/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:17:32,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:17:32,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:17:32,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:17:32,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:17:32,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:17:32,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:17:32,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:17:32,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:17:32,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:17:32,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:17:32,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:17:32,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:17:32,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:17:32,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:17:32,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:17:32,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:17:32,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:17:32,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:17:32,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:17:32,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:17:32,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:17:32,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:17:32,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:17:32,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:17:32,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:17:32,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:17:32,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:17:32,700 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 [2020-09-21 10:17:32,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:17:32,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:17:32,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:17:32,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:17:32,726 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:17:32,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:17:32,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:17:32,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:17:32,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:17:32,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:17:32,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:17:32,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:17:32,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:17:32,728 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:17:32,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:17:32,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:17:32,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:17:32,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:17:32,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:17:32,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:17:32,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:17:32,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:17:32,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:17:32,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:17:32,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:17:32,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:17:32,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:17:32,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:17:32,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:17:32,731 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 [2020-09-21 10:17:33,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:17:33,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:17:33,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:17:33,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:17:33,215 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:17:33,217 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-21 10:17:33,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccbe1e283/e0cc2c00c5de4a5aa4000ec2b5034b0c/FLAG45b13d341 [2020-09-21 10:17:33,874 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:17:33,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-21 10:17:33,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccbe1e283/e0cc2c00c5de4a5aa4000ec2b5034b0c/FLAG45b13d341 [2020-09-21 10:17:34,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccbe1e283/e0cc2c00c5de4a5aa4000ec2b5034b0c [2020-09-21 10:17:34,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:17:34,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:17:34,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:34,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:17:34,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:17:34,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34, skipping insertion in model container [2020-09-21 10:17:34,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:17:34,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:17:34,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:34,510 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:17:34,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:34,551 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:17:34,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34 WrapperNode [2020-09-21 10:17:34,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:34,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:17:34,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:17:34,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:17:34,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (1/1) ... [2020-09-21 10:17:34,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:17:34,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:17:34,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:17:34,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:17:34,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (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 [2020-09-21 10:17:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:17:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:17:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-09-21 10:17:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:17:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:17:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:17:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-09-21 10:17:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:17:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:17:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:17:34,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:17:34,982 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:17:34,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:34 BoogieIcfgContainer [2020-09-21 10:17:34,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:17:34,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:17:34,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:17:34,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:17:34,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:17:34" (1/3) ... [2020-09-21 10:17:34,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636e535d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:34, skipping insertion in model container [2020-09-21 10:17:34,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:34" (2/3) ... [2020-09-21 10:17:34,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636e535d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:34, skipping insertion in model container [2020-09-21 10:17:34,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:34" (3/3) ... [2020-09-21 10:17:35,000 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-09-21 10:17:35,016 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:17:35,029 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:17:35,089 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:17:35,141 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:17:35,142 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:17:35,143 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:17:35,143 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:17:35,144 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:17:35,144 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:17:35,145 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:17:35,145 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:17:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-21 10:17:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:17:35,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:35,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:35,177 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:35,184 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-09-21 10:17:35,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:35,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617556165] [2020-09-21 10:17:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:17:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:17:35,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617556165] [2020-09-21 10:17:35,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:35,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:17:35,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719451562] [2020-09-21 10:17:35,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:17:35,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:35,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:17:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:17:35,522 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-21 10:17:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:35,700 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-09-21 10:17:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:17:35,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 10:17:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:35,730 INFO L225 Difference]: With dead ends: 41 [2020-09-21 10:17:35,730 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 10:17:35,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:17:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 10:17:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 10:17:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 10:17:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-09-21 10:17:35,795 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-09-21 10:17:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:35,795 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-09-21 10:17:35,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:17:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-09-21 10:17:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:17:35,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:35,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:35,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:17:35,803 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-09-21 10:17:35,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:35,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113673320] [2020-09-21 10:17:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:17:35,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113673320] [2020-09-21 10:17:35,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:35,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:17:35,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623348663] [2020-09-21 10:17:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:17:35,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:17:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:17:35,941 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-09-21 10:17:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:36,032 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-09-21 10:17:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:17:36,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-21 10:17:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:36,035 INFO L225 Difference]: With dead ends: 29 [2020-09-21 10:17:36,035 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 10:17:36,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:17:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 10:17:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 10:17:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 10:17:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-09-21 10:17:36,044 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-09-21 10:17:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:36,045 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-09-21 10:17:36,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:17:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-09-21 10:17:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:17:36,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:36,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:36,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:17:36,048 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-09-21 10:17:36,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:36,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504777874] [2020-09-21 10:17:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-21 10:17:36,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504777874] [2020-09-21 10:17:36,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:36,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:17:36,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742085674] [2020-09-21 10:17:36,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:17:36,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:17:36,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:17:36,574 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-09-21 10:17:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:36,966 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-09-21 10:17:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:17:36,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-09-21 10:17:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:36,969 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:17:36,969 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 10:17:36,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:17:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 10:17:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-09-21 10:17:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:17:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-09-21 10:17:36,988 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-09-21 10:17:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:36,991 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-09-21 10:17:36,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:17:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-09-21 10:17:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 10:17:36,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:36,994 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:36,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:17:36,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-09-21 10:17:36,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:36,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543455382] [2020-09-21 10:17:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:17:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 10:17:37,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543455382] [2020-09-21 10:17:37,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:37,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:17:37,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199198006] [2020-09-21 10:17:37,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:17:37,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:17:37,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:17:37,170 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-09-21 10:17:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:37,247 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-09-21 10:17:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:17:37,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-09-21 10:17:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:37,249 INFO L225 Difference]: With dead ends: 54 [2020-09-21 10:17:37,250 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 10:17:37,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:17:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 10:17:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-21 10:17:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:17:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-09-21 10:17:37,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-09-21 10:17:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:37,260 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-09-21 10:17:37,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:17:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-09-21 10:17:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 10:17:37,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:37,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:37,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:17:37,263 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-09-21 10:17:37,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:37,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695839303] [2020-09-21 10:17:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 10:17:37,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695839303] [2020-09-21 10:17:37,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:37,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:17:37,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211650287] [2020-09-21 10:17:37,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:17:37,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:17:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:17:37,814 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-09-21 10:17:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:38,316 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-09-21 10:17:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:17:38,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-09-21 10:17:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:38,318 INFO L225 Difference]: With dead ends: 39 [2020-09-21 10:17:38,318 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 10:17:38,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 10:17:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-09-21 10:17:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 10:17:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-09-21 10:17:38,328 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-09-21 10:17:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:38,328 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-09-21 10:17:38,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:17:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-09-21 10:17:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:17:38,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:38,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:38,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:17:38,331 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-09-21 10:17:38,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:38,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825158940] [2020-09-21 10:17:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-21 10:17:38,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825158940] [2020-09-21 10:17:38,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:38,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:17:38,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671064033] [2020-09-21 10:17:38,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:17:38,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:17:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:17:38,900 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-09-21 10:17:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:39,555 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-09-21 10:17:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:39,555 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-09-21 10:17:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:39,557 INFO L225 Difference]: With dead ends: 42 [2020-09-21 10:17:39,558 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 10:17:39,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:17:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 10:17:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-21 10:17:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 10:17:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-09-21 10:17:39,568 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-09-21 10:17:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:39,568 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-09-21 10:17:39,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:17:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-09-21 10:17:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 10:17:39,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:39,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:39,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:17:39,570 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-09-21 10:17:39,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:39,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476022982] [2020-09-21 10:17:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-09-21 10:17:40,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476022982] [2020-09-21 10:17:40,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:40,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:17:40,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101479103] [2020-09-21 10:17:40,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:17:40,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:17:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:17:40,182 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-09-21 10:17:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:41,058 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 10:17:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:17:41,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-09-21 10:17:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:41,060 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:17:41,060 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 10:17:41,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 10:17:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 10:17:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-21 10:17:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 10:17:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-21 10:17:41,078 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-09-21 10:17:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:41,083 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-21 10:17:41,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:17:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-21 10:17:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 10:17:41,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:41,084 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:41,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:17:41,085 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-09-21 10:17:41,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:41,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236583356] [2020-09-21 10:17:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:17:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-21 10:17:41,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236583356] [2020-09-21 10:17:41,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:41,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:17:41,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120273938] [2020-09-21 10:17:41,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:17:41,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:41,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:17:41,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:17:41,480 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-09-21 10:17:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:42,034 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-09-21 10:17:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:17:42,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-21 10:17:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:42,036 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:17:42,036 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:17:42,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:17:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:17:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-09-21 10:17:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:17:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-09-21 10:17:42,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-09-21 10:17:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:42,060 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-09-21 10:17:42,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:17:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-09-21 10:17:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:17:42,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:42,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:42,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:17:42,063 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-09-21 10:17:42,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:42,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411354488] [2020-09-21 10:17:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:17:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-21 10:17:42,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411354488] [2020-09-21 10:17:42,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:42,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:17:42,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930229059] [2020-09-21 10:17:42,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:17:42,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:17:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:17:42,456 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-09-21 10:17:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:42,863 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-09-21 10:17:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:17:42,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-09-21 10:17:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:42,865 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:17:42,865 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:17:42,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:17:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-09-21 10:17:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:17:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-09-21 10:17:42,874 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-09-21 10:17:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:42,875 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-09-21 10:17:42,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:17:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-09-21 10:17:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 10:17:42,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:42,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:42,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:17:42,877 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-09-21 10:17:42,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:42,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795256237] [2020-09-21 10:17:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:17:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-21 10:17:43,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795256237] [2020-09-21 10:17:43,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:43,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:17:43,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999854656] [2020-09-21 10:17:43,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:17:43,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:17:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:43,499 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-09-21 10:17:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:44,223 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-09-21 10:17:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:44,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-21 10:17:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:44,226 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:17:44,226 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:17:44,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:17:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:17:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-09-21 10:17:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:17:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-09-21 10:17:44,236 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-09-21 10:17:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:44,237 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-09-21 10:17:44,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:17:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-09-21 10:17:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:17:44,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:44,238 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:44,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:17:44,239 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-09-21 10:17:44,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:44,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854649437] [2020-09-21 10:17:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:17:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-09-21 10:17:45,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854649437] [2020-09-21 10:17:45,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:45,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 10:17:45,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239516788] [2020-09-21 10:17:45,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 10:17:45,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 10:17:45,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:17:45,033 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-09-21 10:17:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:46,104 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-09-21 10:17:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:17:46,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-09-21 10:17:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:46,106 INFO L225 Difference]: With dead ends: 47 [2020-09-21 10:17:46,107 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:17:46,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 10:17:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:17:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-09-21 10:17:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 10:17:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-21 10:17:46,117 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-09-21 10:17:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:46,118 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-21 10:17:46,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 10:17:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-21 10:17:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:17:46,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:46,120 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:46,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:17:46,120 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:46,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-09-21 10:17:46,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:46,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093254489] [2020-09-21 10:17:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 10:17:46,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093254489] [2020-09-21 10:17:46,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:46,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:17:46,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189172619] [2020-09-21 10:17:46,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:17:46,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:17:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:17:46,954 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-09-21 10:17:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:48,021 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-09-21 10:17:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:17:48,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-09-21 10:17:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:48,025 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:48,025 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:48,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 10:17:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-21 10:17:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:17:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-09-21 10:17:48,050 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-09-21 10:17:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:48,051 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-09-21 10:17:48,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:17:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-09-21 10:17:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 10:17:48,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:48,055 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:48,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:17:48,056 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-09-21 10:17:48,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:48,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070973812] [2020-09-21 10:17:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:17:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 10:17:48,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070973812] [2020-09-21 10:17:48,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:48,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:17:48,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391382463] [2020-09-21 10:17:48,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:17:48,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:17:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:48,884 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-09-21 10:17:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:50,149 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-09-21 10:17:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:17:50,149 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-09-21 10:17:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:50,151 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:50,151 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:50,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 10:17:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 10:17:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:17:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-09-21 10:17:50,159 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-09-21 10:17:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:50,159 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-09-21 10:17:50,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:17:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-09-21 10:17:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 10:17:50,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:50,161 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:50,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:17:50,161 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:50,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-09-21 10:17:50,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:50,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562860675] [2020-09-21 10:17:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:17:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:50,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 10:17:51,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562860675] [2020-09-21 10:17:51,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:51,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:17:51,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058972211] [2020-09-21 10:17:51,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:17:51,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:51,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:17:51,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:51,013 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-09-21 10:17:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:52,313 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-09-21 10:17:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:17:52,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-09-21 10:17:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:52,314 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:52,315 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:52,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:17:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-21 10:17:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:17:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-09-21 10:17:52,330 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-09-21 10:17:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:52,331 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-09-21 10:17:52,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:17:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-09-21 10:17:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 10:17:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:52,333 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:17:52,333 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-09-21 10:17:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850222206] [2020-09-21 10:17:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:17:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-21 10:17:53,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850222206] [2020-09-21 10:17:53,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:53,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:17:53,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490731205] [2020-09-21 10:17:53,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:17:53,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:17:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:53,090 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-09-21 10:17:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:53,893 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-09-21 10:17:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:53,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-21 10:17:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:53,896 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:53,896 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:53,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:17:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-21 10:17:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:17:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-09-21 10:17:53,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-09-21 10:17:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:53,904 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-09-21 10:17:53,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:17:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-09-21 10:17:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:17:53,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:53,905 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:53,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:17:53,906 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-09-21 10:17:53,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:53,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772823324] [2020-09-21 10:17:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:53,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:53,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:17:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-21 10:17:54,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772823324] [2020-09-21 10:17:54,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:54,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:17:54,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281007619] [2020-09-21 10:17:54,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:17:54,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:54,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:17:54,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:17:54,386 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-09-21 10:17:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:54,905 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-09-21 10:17:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:54,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-09-21 10:17:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:54,907 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:54,907 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:54,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-21 10:17:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:17:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-09-21 10:17:54,915 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-09-21 10:17:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:54,915 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-09-21 10:17:54,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:17:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-09-21 10:17:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:17:54,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:54,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:54,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:17:54,917 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 15 times [2020-09-21 10:17:54,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:54,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37260161] [2020-09-21 10:17:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:17:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-21 10:17:55,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37260161] [2020-09-21 10:17:55,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:55,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:17:55,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63460959] [2020-09-21 10:17:55,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:17:55,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:17:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:17:55,434 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 19 states. [2020-09-21 10:17:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:56,130 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-09-21 10:17:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:17:56,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-09-21 10:17:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:56,134 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:56,135 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:56,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:17:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-21 10:17:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:17:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-09-21 10:17:56,151 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 51 [2020-09-21 10:17:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:56,152 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-09-21 10:17:56,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:17:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-09-21 10:17:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 10:17:56,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:56,156 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:56,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:17:56,157 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 16 times [2020-09-21 10:17:56,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:56,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807526246] [2020-09-21 10:17:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:17:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-09-21 10:17:57,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807526246] [2020-09-21 10:17:57,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:57,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 10:17:57,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506890748] [2020-09-21 10:17:57,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 10:17:57,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 10:17:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:17:57,141 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 28 states. [2020-09-21 10:17:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:58,534 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-09-21 10:17:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:17:58,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-09-21 10:17:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:58,537 INFO L225 Difference]: With dead ends: 50 [2020-09-21 10:17:58,537 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:58,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 10:17:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 10:17:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:17:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-09-21 10:17:58,544 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-09-21 10:17:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:58,545 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-09-21 10:17:58,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 10:17:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-09-21 10:17:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 10:17:58,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:58,546 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:58,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:17:58,546 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-09-21 10:17:58,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:58,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277342852] [2020-09-21 10:17:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:17:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:17:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-09-21 10:17:59,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277342852] [2020-09-21 10:17:59,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:59,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 10:17:59,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879441740] [2020-09-21 10:17:59,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 10:17:59,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:59,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 10:17:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:17:59,437 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-09-21 10:18:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:00,785 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-09-21 10:18:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:18:00,785 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-09-21 10:18:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:00,786 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:00,786 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:00,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 10:18:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:18:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-09-21 10:18:00,794 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-09-21 10:18:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:00,795 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-09-21 10:18:00,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 10:18:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-09-21 10:18:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 10:18:00,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:00,796 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:00,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:18:00,796 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:00,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:00,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-09-21 10:18:00,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:00,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62085847] [2020-09-21 10:18:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:18:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-09-21 10:18:01,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62085847] [2020-09-21 10:18:01,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:01,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 10:18:01,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322952472] [2020-09-21 10:18:01,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 10:18:01,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 10:18:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:18:01,761 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-09-21 10:18:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:03,322 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-09-21 10:18:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:18:03,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-09-21 10:18:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:03,324 INFO L225 Difference]: With dead ends: 55 [2020-09-21 10:18:03,324 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 10:18:03,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 10:18:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 10:18:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-09-21 10:18:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-09-21 10:18:03,331 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-09-21 10:18:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:03,332 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-09-21 10:18:03,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 10:18:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-09-21 10:18:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:18:03,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:03,333 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:03,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:18:03,334 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-09-21 10:18:03,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:03,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542472891] [2020-09-21 10:18:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:18:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:04,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:04,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:04,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:04,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-21 10:18:04,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542472891] [2020-09-21 10:18:04,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:04,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 10:18:04,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568404385] [2020-09-21 10:18:04,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 10:18:04,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 10:18:04,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:18:04,481 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-09-21 10:18:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:06,161 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-09-21 10:18:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:18:06,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-09-21 10:18:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:06,163 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:06,163 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:06,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 10:18:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-21 10:18:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 10:18:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-09-21 10:18:06,170 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-09-21 10:18:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:06,171 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-09-21 10:18:06,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 10:18:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-09-21 10:18:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 10:18:06,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:06,172 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:06,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:18:06,173 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-09-21 10:18:06,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:06,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672211153] [2020-09-21 10:18:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:18:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-09-21 10:18:06,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672211153] [2020-09-21 10:18:06,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:06,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:18:06,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82301237] [2020-09-21 10:18:06,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:18:06,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:18:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:18:06,881 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-09-21 10:18:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:07,697 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-09-21 10:18:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:18:07,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-21 10:18:07,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:07,699 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:07,700 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:07,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:18:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:18:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-09-21 10:18:07,707 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-09-21 10:18:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:07,707 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-09-21 10:18:07,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:18:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-09-21 10:18:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 10:18:07,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:07,709 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:07,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:18:07,709 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-09-21 10:18:07,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:07,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699791312] [2020-09-21 10:18:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:07,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:08,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:08,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:18:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:08,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:08,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:08,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 10:18:08,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699791312] [2020-09-21 10:18:08,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:08,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:18:08,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194479836] [2020-09-21 10:18:08,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:18:08,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:18:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:18:08,550 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-09-21 10:18:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:09,736 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-09-21 10:18:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:18:09,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-09-21 10:18:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:09,738 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:09,738 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:09,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:18:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:18:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-09-21 10:18:09,745 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-09-21 10:18:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:09,745 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-09-21 10:18:09,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:18:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-09-21 10:18:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 10:18:09,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:09,746 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:09,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:18:09,747 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:09,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-09-21 10:18:09,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:09,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545214913] [2020-09-21 10:18:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:09,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:09,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:09,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:18:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-21 10:18:10,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545214913] [2020-09-21 10:18:10,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:10,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:18:10,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147458647] [2020-09-21 10:18:10,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:18:10,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:10,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:18:10,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:18:10,460 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-09-21 10:18:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:11,460 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-09-21 10:18:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:18:11,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-09-21 10:18:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:11,463 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:11,463 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:11,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 10:18:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:18:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-09-21 10:18:11,470 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-09-21 10:18:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:11,470 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-09-21 10:18:11,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:18:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-09-21 10:18:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:18:11,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:11,472 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:11,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:18:11,472 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 23 times [2020-09-21 10:18:11,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:11,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867240323] [2020-09-21 10:18:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:11,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:12,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:18:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:12,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:12,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-09-21 10:18:12,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867240323] [2020-09-21 10:18:12,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:12,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 10:18:12,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870341211] [2020-09-21 10:18:12,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 10:18:12,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 10:18:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:18:12,287 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 24 states. [2020-09-21 10:18:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:13,379 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-09-21 10:18:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:18:13,379 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-09-21 10:18:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:13,380 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:13,381 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:13,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 10:18:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:18:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-09-21 10:18:13,386 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 65 [2020-09-21 10:18:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:13,387 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-09-21 10:18:13,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 10:18:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-09-21 10:18:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:18:13,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:13,388 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:13,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:18:13,389 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-09-21 10:18:13,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:13,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355748334] [2020-09-21 10:18:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:18:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:13,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-21 10:18:14,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355748334] [2020-09-21 10:18:14,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:14,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 10:18:14,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538727788] [2020-09-21 10:18:14,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 10:18:14,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:14,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 10:18:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:18:14,493 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-09-21 10:18:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:16,196 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-09-21 10:18:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:18:16,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-09-21 10:18:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:16,198 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:16,198 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:16,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 10:18:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-21 10:18:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:18:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-09-21 10:18:16,204 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-09-21 10:18:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:16,204 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-09-21 10:18:16,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 10:18:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-09-21 10:18:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:18:16,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:16,205 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:16,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:18:16,206 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 25 times [2020-09-21 10:18:16,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:16,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194804509] [2020-09-21 10:18:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:18:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:17,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:17,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:17,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:17,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:17,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-21 10:18:17,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194804509] [2020-09-21 10:18:17,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:17,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 10:18:17,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522285244] [2020-09-21 10:18:17,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 10:18:17,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 10:18:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:18:17,601 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 32 states. [2020-09-21 10:18:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:19,564 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-09-21 10:18:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:18:19,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-09-21 10:18:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:19,567 INFO L225 Difference]: With dead ends: 53 [2020-09-21 10:18:19,567 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 10:18:19,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-09-21 10:18:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 10:18:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-21 10:18:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 10:18:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-09-21 10:18:19,573 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-09-21 10:18:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:19,573 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-09-21 10:18:19,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 10:18:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-09-21 10:18:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 10:18:19,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:19,574 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:19,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:18:19,575 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-09-21 10:18:19,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:19,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783791581] [2020-09-21 10:18:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 10:18:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-09-21 10:18:20,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783791581] [2020-09-21 10:18:20,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:20,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 10:18:20,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393322145] [2020-09-21 10:18:20,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 10:18:20,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 10:18:20,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-09-21 10:18:20,658 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-09-21 10:18:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:22,454 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-09-21 10:18:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:18:22,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-09-21 10:18:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:22,456 INFO L225 Difference]: With dead ends: 56 [2020-09-21 10:18:22,457 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 10:18:22,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-09-21 10:18:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 10:18:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-09-21 10:18:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:18:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-21 10:18:22,464 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-09-21 10:18:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:22,464 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-21 10:18:22,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 10:18:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-21 10:18:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:18:22,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:22,465 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:22,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:18:22,466 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:22,466 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-09-21 10:18:22,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:22,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438523240] [2020-09-21 10:18:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:18:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:22,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-21 10:18:23,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438523240] [2020-09-21 10:18:23,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:23,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 10:18:23,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813349629] [2020-09-21 10:18:23,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 10:18:23,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 10:18:23,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-09-21 10:18:23,668 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-09-21 10:18:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:25,587 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-09-21 10:18:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:18:25,588 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-09-21 10:18:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:25,589 INFO L225 Difference]: With dead ends: 58 [2020-09-21 10:18:25,590 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 10:18:25,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-09-21 10:18:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 10:18:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-09-21 10:18:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:18:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-21 10:18:25,597 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-09-21 10:18:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:25,597 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-21 10:18:25,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 10:18:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-21 10:18:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-21 10:18:25,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:25,599 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:25,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 10:18:25,599 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-09-21 10:18:25,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:25,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217840248] [2020-09-21 10:18:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:25,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:18:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-21 10:18:26,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217840248] [2020-09-21 10:18:26,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:26,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 10:18:26,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63828590] [2020-09-21 10:18:26,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 10:18:26,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:26,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 10:18:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-09-21 10:18:26,966 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-09-21 10:18:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:29,040 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-09-21 10:18:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:18:29,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-09-21 10:18:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:29,042 INFO L225 Difference]: With dead ends: 58 [2020-09-21 10:18:29,042 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 10:18:29,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-09-21 10:18:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 10:18:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-09-21 10:18:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:18:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-21 10:18:29,049 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-09-21 10:18:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:29,049 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-21 10:18:29,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 10:18:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-21 10:18:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-21 10:18:29,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:29,050 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:29,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 10:18:29,051 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-09-21 10:18:29,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:29,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113990511] [2020-09-21 10:18:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:29,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:29,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:18:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:29,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:29,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:29,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:29,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat