/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:59:39,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:59:39,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:59:39,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:59:39,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:59:39,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:59:39,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:59:39,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:59:39,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:59:39,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:59:39,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:59:39,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:59:39,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:59:39,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:59:39,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:59:39,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:59:39,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:59:39,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:59:39,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:59:39,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:59:39,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:59:39,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:59:39,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:59:39,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:59:39,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:59:39,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:59:39,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:59:39,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:59:39,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:59:39,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:59:39,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:59:39,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:59:39,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:59:39,282 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:59:39,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:59:39,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:59:39,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:59:39,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:59:39,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:59:39,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:59:39,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:59:39,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:59:39,284 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:59:39,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:59:39,285 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:59:39,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:59:39,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:59:39,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:59:39,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:59:39,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:59:39,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:39,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:59:39,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:59:39,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:59:39,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:59:39,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:59:39,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:59:39,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:59:39,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:59:39,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:59:39,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:59:39,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:59:39,660 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:59:39,660 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:59:39,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-21 22:59:39,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51ceac6cc/8705f7c73aca4bd69d7374262e9dcf77/FLAG951546b70 [2020-08-21 22:59:40,187 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:59:40,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-21 22:59:40,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51ceac6cc/8705f7c73aca4bd69d7374262e9dcf77/FLAG951546b70 [2020-08-21 22:59:40,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51ceac6cc/8705f7c73aca4bd69d7374262e9dcf77 [2020-08-21 22:59:40,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:59:40,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:59:40,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:40,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:59:40,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:59:40,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6381bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40, skipping insertion in model container [2020-08-21 22:59:40,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:59:40,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:59:40,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:40,797 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:59:40,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:40,835 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:59:40,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40 WrapperNode [2020-08-21 22:59:40,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:40,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:59:40,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:59:40,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:59:40,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... [2020-08-21 22:59:40,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:59:40,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:59:40,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:59:40,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:59:40,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:41,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:59:41,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:59:41,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:59:41,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:59:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:59:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:59:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:59:41,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:59:41,274 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:59:41,274 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:59:41,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:41 BoogieIcfgContainer [2020-08-21 22:59:41,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:59:41,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:59:41,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:59:41,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:59:41,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:59:40" (1/3) ... [2020-08-21 22:59:41,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186bf931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:41, skipping insertion in model container [2020-08-21 22:59:41,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:40" (2/3) ... [2020-08-21 22:59:41,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186bf931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:41, skipping insertion in model container [2020-08-21 22:59:41,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:41" (3/3) ... [2020-08-21 22:59:41,289 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-21 22:59:41,304 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:59:41,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:59:41,328 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:59:41,356 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:59:41,356 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:59:41,356 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:59:41,356 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:59:41,357 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:59:41,357 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:59:41,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:59:41,357 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:59:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 22:59:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 22:59:41,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:41,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:41,388 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:41,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-21 22:59:41,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:41,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186762059] [2020-08-21 22:59:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:41,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186762059] [2020-08-21 22:59:41,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:41,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:41,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813931427] [2020-08-21 22:59:41,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:41,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:41,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,641 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 22:59:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:41,730 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-21 22:59:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:41,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 22:59:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:41,745 INFO L225 Difference]: With dead ends: 69 [2020-08-21 22:59:41,745 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 22:59:41,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 22:59:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-21 22:59:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 22:59:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-21 22:59:41,796 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-21 22:59:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:41,797 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-21 22:59:41,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-21 22:59:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 22:59:41,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:41,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:41,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:59:41,799 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:41,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-21 22:59:41,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:41,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675426972] [2020-08-21 22:59:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:41,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675426972] [2020-08-21 22:59:41,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:41,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:41,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282904962] [2020-08-21 22:59:41,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:41,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:41,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,879 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-21 22:59:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:41,919 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-21 22:59:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:41,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 22:59:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:41,922 INFO L225 Difference]: With dead ends: 87 [2020-08-21 22:59:41,922 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 22:59:41,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 22:59:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-21 22:59:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 22:59:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-21 22:59:41,934 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-21 22:59:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:41,935 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-21 22:59:41,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-21 22:59:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 22:59:41,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:41,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:41,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:59:41,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-21 22:59:41,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:41,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959195341] [2020-08-21 22:59:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:41,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959195341] [2020-08-21 22:59:41,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:41,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:41,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647154238] [2020-08-21 22:59:41,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:41,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,991 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-21 22:59:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,012 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-21 22:59:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 22:59:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,014 INFO L225 Difference]: With dead ends: 81 [2020-08-21 22:59:42,014 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 22:59:42,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 22:59:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-21 22:59:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 22:59:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-21 22:59:42,026 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-21 22:59:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,027 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-21 22:59:42,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-21 22:59:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 22:59:42,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:59:42,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-21 22:59:42,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18729840] [2020-08-21 22:59:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18729840] [2020-08-21 22:59:42,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962067517] [2020-08-21 22:59:42,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,106 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-21 22:59:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,130 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-21 22:59:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 22:59:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,136 INFO L225 Difference]: With dead ends: 100 [2020-08-21 22:59:42,136 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 22:59:42,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 22:59:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-21 22:59:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 22:59:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-21 22:59:42,149 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-21 22:59:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,150 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-21 22:59:42,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-21 22:59:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 22:59:42,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:59:42,152 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-21 22:59:42,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190940009] [2020-08-21 22:59:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190940009] [2020-08-21 22:59:42,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977834487] [2020-08-21 22:59:42,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,189 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-21 22:59:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,214 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-21 22:59:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 22:59:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,216 INFO L225 Difference]: With dead ends: 164 [2020-08-21 22:59:42,216 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 22:59:42,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 22:59:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-21 22:59:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 22:59:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-21 22:59:42,230 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-21 22:59:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,231 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-21 22:59:42,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-21 22:59:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:42,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:59:42,233 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-21 22:59:42,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656203810] [2020-08-21 22:59:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656203810] [2020-08-21 22:59:42,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779860089] [2020-08-21 22:59:42,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,273 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-21 22:59:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,295 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-21 22:59:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,297 INFO L225 Difference]: With dead ends: 147 [2020-08-21 22:59:42,298 INFO L226 Difference]: Without dead ends: 102 [2020-08-21 22:59:42,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-21 22:59:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-21 22:59:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 22:59:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-21 22:59:42,311 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-21 22:59:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,312 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-21 22:59:42,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-21 22:59:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:42,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:59:42,314 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-21 22:59:42,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850315538] [2020-08-21 22:59:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850315538] [2020-08-21 22:59:42,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184654688] [2020-08-21 22:59:42,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,365 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-21 22:59:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,383 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-21 22:59:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,386 INFO L225 Difference]: With dead ends: 180 [2020-08-21 22:59:42,386 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 22:59:42,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 22:59:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-21 22:59:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 22:59:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-21 22:59:42,407 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-21 22:59:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,407 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-21 22:59:42,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-21 22:59:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:42,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:59:42,410 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-21 22:59:42,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980796399] [2020-08-21 22:59:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980796399] [2020-08-21 22:59:42,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082822577] [2020-08-21 22:59:42,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,473 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-21 22:59:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,494 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 22:59:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,496 INFO L225 Difference]: With dead ends: 312 [2020-08-21 22:59:42,497 INFO L226 Difference]: Without dead ends: 186 [2020-08-21 22:59:42,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-21 22:59:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-21 22:59:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 22:59:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-21 22:59:42,514 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-21 22:59:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,515 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-21 22:59:42,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-21 22:59:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:42,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:59:42,517 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-21 22:59:42,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300567354] [2020-08-21 22:59:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300567354] [2020-08-21 22:59:42,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463063496] [2020-08-21 22:59:42,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,546 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-21 22:59:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,565 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-21 22:59:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,568 INFO L225 Difference]: With dead ends: 276 [2020-08-21 22:59:42,568 INFO L226 Difference]: Without dead ends: 190 [2020-08-21 22:59:42,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-21 22:59:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-21 22:59:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-21 22:59:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-21 22:59:42,594 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-21 22:59:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,595 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-21 22:59:42,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-21 22:59:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:42,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:59:42,599 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-21 22:59:42,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092481423] [2020-08-21 22:59:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092481423] [2020-08-21 22:59:42,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789297714] [2020-08-21 22:59:42,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,663 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-21 22:59:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,686 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-21 22:59:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,689 INFO L225 Difference]: With dead ends: 332 [2020-08-21 22:59:42,689 INFO L226 Difference]: Without dead ends: 330 [2020-08-21 22:59:42,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-21 22:59:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-21 22:59:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 22:59:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-21 22:59:42,704 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-21 22:59:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,704 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-21 22:59:42,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-21 22:59:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:42,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:59:42,707 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-21 22:59:42,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136102171] [2020-08-21 22:59:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136102171] [2020-08-21 22:59:42,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503325513] [2020-08-21 22:59:42,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,735 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-21 22:59:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,758 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-21 22:59:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,761 INFO L225 Difference]: With dead ends: 604 [2020-08-21 22:59:42,761 INFO L226 Difference]: Without dead ends: 354 [2020-08-21 22:59:42,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-21 22:59:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-21 22:59:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-21 22:59:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-21 22:59:42,778 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-21 22:59:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,778 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-21 22:59:42,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-21 22:59:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:42,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:59:42,782 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-21 22:59:42,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408061138] [2020-08-21 22:59:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408061138] [2020-08-21 22:59:42,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426615683] [2020-08-21 22:59:42,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,806 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-21 22:59:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,826 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-21 22:59:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,829 INFO L225 Difference]: With dead ends: 528 [2020-08-21 22:59:42,829 INFO L226 Difference]: Without dead ends: 362 [2020-08-21 22:59:42,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-21 22:59:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-21 22:59:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 22:59:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-21 22:59:42,844 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-21 22:59:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,844 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-21 22:59:42,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-21 22:59:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:42,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:59:42,847 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-21 22:59:42,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323391346] [2020-08-21 22:59:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323391346] [2020-08-21 22:59:42,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597569495] [2020-08-21 22:59:42,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,870 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-21 22:59:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,891 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-21 22:59:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,895 INFO L225 Difference]: With dead ends: 620 [2020-08-21 22:59:42,895 INFO L226 Difference]: Without dead ends: 618 [2020-08-21 22:59:42,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-21 22:59:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-21 22:59:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-21 22:59:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-21 22:59:42,913 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-21 22:59:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,913 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-21 22:59:42,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-21 22:59:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:42,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:59:42,916 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-21 22:59:42,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334003009] [2020-08-21 22:59:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:42,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334003009] [2020-08-21 22:59:42,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147694770] [2020-08-21 22:59:42,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,939 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-21 22:59:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,968 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-21 22:59:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,972 INFO L225 Difference]: With dead ends: 1180 [2020-08-21 22:59:42,972 INFO L226 Difference]: Without dead ends: 682 [2020-08-21 22:59:42,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-21 22:59:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-21 22:59:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-21 22:59:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-21 22:59:43,000 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-21 22:59:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,001 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-21 22:59:43,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-21 22:59:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:43,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:59:43,003 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,004 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-21 22:59:43,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435935236] [2020-08-21 22:59:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435935236] [2020-08-21 22:59:43,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160240695] [2020-08-21 22:59:43,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,032 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-21 22:59:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,059 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-21 22:59:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,064 INFO L225 Difference]: With dead ends: 1020 [2020-08-21 22:59:43,064 INFO L226 Difference]: Without dead ends: 698 [2020-08-21 22:59:43,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-21 22:59:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-21 22:59:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-21 22:59:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-21 22:59:43,095 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-21 22:59:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,096 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-21 22:59:43,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-21 22:59:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:43,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:59:43,098 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,098 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-21 22:59:43,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420728599] [2020-08-21 22:59:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420728599] [2020-08-21 22:59:43,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303547448] [2020-08-21 22:59:43,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,122 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-21 22:59:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,150 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-21 22:59:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,157 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 22:59:43,157 INFO L226 Difference]: Without dead ends: 1162 [2020-08-21 22:59:43,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-21 22:59:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-21 22:59:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-21 22:59:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-21 22:59:43,190 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-21 22:59:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,190 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-21 22:59:43,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-21 22:59:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:43,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:59:43,193 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-21 22:59:43,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15072565] [2020-08-21 22:59:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15072565] [2020-08-21 22:59:43,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386012003] [2020-08-21 22:59:43,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,216 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-21 22:59:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,253 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-21 22:59:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,259 INFO L225 Difference]: With dead ends: 2316 [2020-08-21 22:59:43,260 INFO L226 Difference]: Without dead ends: 1322 [2020-08-21 22:59:43,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-21 22:59:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-21 22:59:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-21 22:59:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-21 22:59:43,302 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-21 22:59:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,302 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-21 22:59:43,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-21 22:59:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:43,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:59:43,306 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-21 22:59:43,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576762834] [2020-08-21 22:59:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576762834] [2020-08-21 22:59:43,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438217079] [2020-08-21 22:59:43,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,330 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-21 22:59:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,375 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-21 22:59:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,382 INFO L225 Difference]: With dead ends: 1980 [2020-08-21 22:59:43,382 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 22:59:43,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 22:59:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-21 22:59:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-21 22:59:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-21 22:59:43,425 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-21 22:59:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,426 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-21 22:59:43,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-21 22:59:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:43,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:59:43,429 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-21 22:59:43,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447956420] [2020-08-21 22:59:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447956420] [2020-08-21 22:59:43,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450378072] [2020-08-21 22:59:43,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,451 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-21 22:59:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,498 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-21 22:59:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,509 INFO L225 Difference]: With dead ends: 2186 [2020-08-21 22:59:43,509 INFO L226 Difference]: Without dead ends: 2184 [2020-08-21 22:59:43,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-21 22:59:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-21 22:59:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-21 22:59:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-21 22:59:43,587 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-21 22:59:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,587 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-21 22:59:43,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-21 22:59:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:43,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:59:43,592 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-21 22:59:43,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768008527] [2020-08-21 22:59:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:43,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768008527] [2020-08-21 22:59:43,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972622746] [2020-08-21 22:59:43,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,612 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-21 22:59:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,673 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-21 22:59:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,674 INFO L225 Difference]: With dead ends: 4552 [2020-08-21 22:59:43,675 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:59:43,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:59:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:59:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:59:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:59:43,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-21 22:59:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,682 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:59:43,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:59:43,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:59:43,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:59:43,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:59:43,706 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:59:43,706 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:43,706 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:43,707 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:59:43,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:59:43,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:43,707 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-21 22:59:43,707 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-21 22:59:43,707 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,707 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-21 22:59:43,707 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-21 22:59:43,708 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-21 22:59:43,708 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-21 22:59:43,708 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-21 22:59:43,708 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,708 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-21 22:59:43,708 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,708 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-21 22:59:43,709 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-21 22:59:43,710 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,711 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-21 22:59:43,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:59:43 BoogieIcfgContainer [2020-08-21 22:59:43,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:59:43,726 INFO L168 Benchmark]: Toolchain (without parser) took 3147.51 ms. Allocated memory was 145.2 MB in the beginning and 250.1 MB in the end (delta: 104.9 MB). Free memory was 109.0 MB in the beginning and 178.6 MB in the end (delta: -69.6 MB). Peak memory consumption was 35.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:43,726 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 145.2 MB. Free memory was 126.8 MB in the beginning and 126.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:59:43,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.47 ms. Allocated memory is still 145.2 MB. Free memory was 108.8 MB in the beginning and 98.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:43,731 INFO L168 Benchmark]: Boogie Preprocessor took 118.19 ms. Allocated memory was 145.2 MB in the beginning and 206.0 MB in the end (delta: 60.8 MB). Free memory was 98.5 MB in the beginning and 184.9 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:43,731 INFO L168 Benchmark]: RCFGBuilder took 325.44 ms. Allocated memory is still 206.0 MB. Free memory was 184.3 MB in the beginning and 168.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:43,732 INFO L168 Benchmark]: TraceAbstraction took 2440.17 ms. Allocated memory was 206.0 MB in the beginning and 250.1 MB in the end (delta: 44.0 MB). Free memory was 167.6 MB in the beginning and 178.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:43,737 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 145.2 MB. Free memory was 126.8 MB in the beginning and 126.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.47 ms. Allocated memory is still 145.2 MB. Free memory was 108.8 MB in the beginning and 98.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.19 ms. Allocated memory was 145.2 MB in the beginning and 206.0 MB in the end (delta: 60.8 MB). Free memory was 98.5 MB in the beginning and 184.9 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.44 ms. Allocated memory is still 206.0 MB. Free memory was 184.3 MB in the beginning and 168.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2440.17 ms. Allocated memory was 206.0 MB in the beginning and 250.1 MB in the end (delta: 44.0 MB). Free memory was 167.6 MB in the beginning and 178.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...