/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:49:05,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:49:05,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:49:05,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:49:05,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:49:05,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:49:05,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:49:05,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:49:05,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:49:05,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:49:05,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:49:05,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:49:05,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:49:05,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:49:05,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:49:05,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:49:05,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:49:05,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:49:05,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:49:05,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:49:05,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:49:05,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:49:05,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:49:05,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:49:05,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:49:05,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:49:05,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:49:05,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:49:05,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:49:05,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:49:05,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:49:05,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:49:05,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:49:05,770 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:49:05,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:49:05,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:49:05,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:49:05,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:49:05,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:49:05,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:49:05,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:49:05,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:49:05,774 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:49:05,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:49:05,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:49:05,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:49:05,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:49:05,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:49:05,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:49:05,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:49:05,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:05,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:49:05,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:49:05,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:49:05,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:49:05,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:49:05,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:49:05,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:49:05,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:49:06,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:49:06,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:49:06,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:49:06,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:49:06,142 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:49:06,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 06:49:06,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49f46dbb6/0971248c3bae4e298ad2c48e358da5e0/FLAGd1f20b260 [2020-08-19 06:49:06,708 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:49:06,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 06:49:06,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49f46dbb6/0971248c3bae4e298ad2c48e358da5e0/FLAGd1f20b260 [2020-08-19 06:49:07,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49f46dbb6/0971248c3bae4e298ad2c48e358da5e0 [2020-08-19 06:49:07,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:49:07,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:49:07,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:07,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:49:07,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:49:07,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39315203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07, skipping insertion in model container [2020-08-19 06:49:07,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:49:07,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:49:07,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:07,305 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:49:07,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:07,350 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:49:07,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07 WrapperNode [2020-08-19 06:49:07,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:07,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:49:07,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:49:07,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:49:07,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... [2020-08-19 06:49:07,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:49:07,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:49:07,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:49:07,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:49:07,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:49:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:49:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:49:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:49:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:49:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:49:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:49:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:49:07,876 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:49:07,877 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:49:07,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:07 BoogieIcfgContainer [2020-08-19 06:49:07,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:49:07,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:49:07,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:49:07,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:49:07,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:49:07" (1/3) ... [2020-08-19 06:49:07,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c0af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:07, skipping insertion in model container [2020-08-19 06:49:07,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:07" (2/3) ... [2020-08-19 06:49:07,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422c0af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:07, skipping insertion in model container [2020-08-19 06:49:07,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:07" (3/3) ... [2020-08-19 06:49:07,892 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-19 06:49:07,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:49:07,913 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:49:07,936 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:49:07,973 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:49:07,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:49:07,974 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:49:07,974 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:49:07,974 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:49:07,974 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:49:07,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:49:07,975 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:49:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 06:49:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:08,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,007 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] [2020-08-19 06:49:08,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-19 06:49:08,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052973404] [2020-08-19 06:49:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:08,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052973404] [2020-08-19 06:49:08,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564186451] [2020-08-19 06:49:08,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,251 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-19 06:49:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,331 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-19 06:49:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,348 INFO L225 Difference]: With dead ends: 93 [2020-08-19 06:49:08,348 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 06:49:08,352 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 [2020-08-19 06:49:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 06:49:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-19 06:49:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 06:49:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-19 06:49:08,399 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-19 06:49:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,399 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-19 06:49:08,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-19 06:49:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 06:49:08,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,401 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] [2020-08-19 06:49:08,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:49:08,402 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-19 06:49:08,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230965913] [2020-08-19 06:49:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:08,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230965913] [2020-08-19 06:49:08,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568196079] [2020-08-19 06:49:08,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,496 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-19 06:49:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,526 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-19 06:49:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 06:49:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,529 INFO L225 Difference]: With dead ends: 127 [2020-08-19 06:49:08,529 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 06:49:08,531 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 [2020-08-19 06:49:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 06:49:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 06:49:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 06:49:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-19 06:49:08,544 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-19 06:49:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,545 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-19 06:49:08,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-19 06:49:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:08,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,547 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] [2020-08-19 06:49:08,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:49:08,547 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-19 06:49:08,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960282783] [2020-08-19 06:49:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:08,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960282783] [2020-08-19 06:49:08,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240734764] [2020-08-19 06:49:08,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,610 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-19 06:49:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,635 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-19 06:49:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,637 INFO L225 Difference]: With dead ends: 117 [2020-08-19 06:49:08,638 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 06:49:08,639 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 [2020-08-19 06:49:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 06:49:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-19 06:49:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 06:49:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-19 06:49:08,651 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-19 06:49:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,652 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-19 06:49:08,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-19 06:49:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:08,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,653 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] [2020-08-19 06:49:08,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:49:08,654 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-19 06:49:08,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913167219] [2020-08-19 06:49:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:08,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913167219] [2020-08-19 06:49:08,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553510942] [2020-08-19 06:49:08,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,707 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-19 06:49:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,729 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-19 06:49:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,732 INFO L225 Difference]: With dead ends: 148 [2020-08-19 06:49:08,732 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 06:49:08,732 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 [2020-08-19 06:49:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 06:49:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-19 06:49:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 06:49:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-19 06:49:08,748 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-19 06:49:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,749 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-19 06:49:08,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-19 06:49:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:49:08,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,751 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] [2020-08-19 06:49:08,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:49:08,752 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-19 06:49:08,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734299155] [2020-08-19 06:49:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:08,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734299155] [2020-08-19 06:49:08,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422136748] [2020-08-19 06:49:08,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,816 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-19 06:49:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,845 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-19 06:49:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 06:49:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,848 INFO L225 Difference]: With dead ends: 244 [2020-08-19 06:49:08,848 INFO L226 Difference]: Without dead ends: 148 [2020-08-19 06:49:08,849 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 [2020-08-19 06:49:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-19 06:49:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-19 06:49:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 06:49:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-19 06:49:08,865 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-19 06:49:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,865 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-19 06:49:08,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-19 06:49:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:08,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,868 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] [2020-08-19 06:49:08,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:49:08,868 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-19 06:49:08,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997872247] [2020-08-19 06:49:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:08,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997872247] [2020-08-19 06:49:08,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:08,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:08,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68748199] [2020-08-19 06:49:08,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:08,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:08,943 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-19 06:49:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:08,962 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-19 06:49:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:08,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:08,965 INFO L225 Difference]: With dead ends: 219 [2020-08-19 06:49:08,965 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 06:49:08,966 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 [2020-08-19 06:49:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 06:49:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-19 06:49:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-19 06:49:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-19 06:49:08,981 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-19 06:49:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:08,981 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-19 06:49:08,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-19 06:49:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:08,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:08,983 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] [2020-08-19 06:49:08,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:49:08,983 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:08,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-19 06:49:08,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:08,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595044490] [2020-08-19 06:49:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595044490] [2020-08-19 06:49:09,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347909595] [2020-08-19 06:49:09,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,026 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-19 06:49:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,045 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-19 06:49:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,048 INFO L225 Difference]: With dead ends: 276 [2020-08-19 06:49:09,048 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 06:49:09,049 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 [2020-08-19 06:49:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 06:49:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-19 06:49:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 06:49:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-19 06:49:09,071 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-19 06:49:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,072 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-19 06:49:09,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-19 06:49:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 06:49:09,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,073 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] [2020-08-19 06:49:09,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:49:09,079 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-19 06:49:09,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490317786] [2020-08-19 06:49:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490317786] [2020-08-19 06:49:09,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238995565] [2020-08-19 06:49:09,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,114 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-19 06:49:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,137 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-19 06:49:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 06:49:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,140 INFO L225 Difference]: With dead ends: 472 [2020-08-19 06:49:09,140 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 06:49:09,142 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 [2020-08-19 06:49:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 06:49:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-19 06:49:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-19 06:49:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-19 06:49:09,165 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-19 06:49:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,165 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-19 06:49:09,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-19 06:49:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:09,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,168 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, 1] [2020-08-19 06:49:09,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:49:09,168 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-19 06:49:09,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194863858] [2020-08-19 06:49:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194863858] [2020-08-19 06:49:09,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065542534] [2020-08-19 06:49:09,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,208 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-19 06:49:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,228 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-19 06:49:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,231 INFO L225 Difference]: With dead ends: 420 [2020-08-19 06:49:09,231 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 06:49:09,232 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 [2020-08-19 06:49:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 06:49:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-19 06:49:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-19 06:49:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-19 06:49:09,245 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-19 06:49:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,246 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-19 06:49:09,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-19 06:49:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:09,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,248 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, 1] [2020-08-19 06:49:09,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:49:09,248 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-19 06:49:09,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782848153] [2020-08-19 06:49:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782848153] [2020-08-19 06:49:09,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112623449] [2020-08-19 06:49:09,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,301 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-19 06:49:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,336 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-19 06:49:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,340 INFO L225 Difference]: With dead ends: 524 [2020-08-19 06:49:09,340 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 06:49:09,341 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 [2020-08-19 06:49:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 06:49:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-19 06:49:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 06:49:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-19 06:49:09,364 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-19 06:49:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,366 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-19 06:49:09,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-19 06:49:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 06:49:09,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,372 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, 1] [2020-08-19 06:49:09,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:49:09,373 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-19 06:49:09,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614541127] [2020-08-19 06:49:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614541127] [2020-08-19 06:49:09,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142757902] [2020-08-19 06:49:09,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,429 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-19 06:49:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,470 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-19 06:49:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 06:49:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,476 INFO L225 Difference]: With dead ends: 924 [2020-08-19 06:49:09,476 INFO L226 Difference]: Without dead ends: 546 [2020-08-19 06:49:09,477 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 [2020-08-19 06:49:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-19 06:49:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-19 06:49:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-19 06:49:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-19 06:49:09,503 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-19 06:49:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,504 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-19 06:49:09,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-19 06:49:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:09,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,509 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, 1, 1] [2020-08-19 06:49:09,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:49:09,510 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-19 06:49:09,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088817543] [2020-08-19 06:49:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088817543] [2020-08-19 06:49:09,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086132577] [2020-08-19 06:49:09,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,548 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-19 06:49:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,573 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-19 06:49:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,578 INFO L225 Difference]: With dead ends: 816 [2020-08-19 06:49:09,578 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 06:49:09,580 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 [2020-08-19 06:49:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 06:49:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-19 06:49:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-19 06:49:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-19 06:49:09,598 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-19 06:49:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,598 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-19 06:49:09,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-19 06:49:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:09,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,600 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, 1, 1] [2020-08-19 06:49:09,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:49:09,603 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-19 06:49:09,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621201061] [2020-08-19 06:49:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621201061] [2020-08-19 06:49:09,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887848181] [2020-08-19 06:49:09,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,661 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-19 06:49:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,690 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-19 06:49:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,697 INFO L225 Difference]: With dead ends: 1004 [2020-08-19 06:49:09,697 INFO L226 Difference]: Without dead ends: 1002 [2020-08-19 06:49:09,698 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 [2020-08-19 06:49:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-19 06:49:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-19 06:49:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 06:49:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-19 06:49:09,725 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-19 06:49:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,725 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-19 06:49:09,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-19 06:49:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 06:49:09,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,727 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, 1, 1] [2020-08-19 06:49:09,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:49:09,728 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-19 06:49:09,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410925430] [2020-08-19 06:49:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410925430] [2020-08-19 06:49:09,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816895903] [2020-08-19 06:49:09,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,776 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-19 06:49:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,840 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-19 06:49:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 06:49:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,846 INFO L225 Difference]: With dead ends: 1820 [2020-08-19 06:49:09,847 INFO L226 Difference]: Without dead ends: 1066 [2020-08-19 06:49:09,849 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 [2020-08-19 06:49:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-19 06:49:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-19 06:49:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-19 06:49:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-19 06:49:09,887 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-19 06:49:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,887 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-19 06:49:09,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-19 06:49:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:49:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,890 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, 1, 1, 1] [2020-08-19 06:49:09,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:49:09,891 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-19 06:49:09,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118906406] [2020-08-19 06:49:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:09,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118906406] [2020-08-19 06:49:09,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:09,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:09,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481995098] [2020-08-19 06:49:09,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:09,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:09,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:09,918 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-19 06:49:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:09,949 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-19 06:49:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:09,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 06:49:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:09,955 INFO L225 Difference]: With dead ends: 1596 [2020-08-19 06:49:09,955 INFO L226 Difference]: Without dead ends: 1082 [2020-08-19 06:49:09,958 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 [2020-08-19 06:49:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-19 06:49:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-19 06:49:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-19 06:49:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-19 06:49:09,993 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-19 06:49:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:09,994 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-19 06:49:09,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-19 06:49:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:49:09,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:09,996 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, 1, 1, 1] [2020-08-19 06:49:09,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:49:09,996 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-19 06:49:09,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:09,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144743364] [2020-08-19 06:49:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:10,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144743364] [2020-08-19 06:49:10,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149449448] [2020-08-19 06:49:10,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,022 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-19 06:49:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,057 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-19 06:49:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 06:49:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,067 INFO L225 Difference]: With dead ends: 1932 [2020-08-19 06:49:10,068 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 06:49:10,069 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 [2020-08-19 06:49:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 06:49:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-19 06:49:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 06:49:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-19 06:49:10,126 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-19 06:49:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,127 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-19 06:49:10,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-19 06:49:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:49:10,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,131 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, 1, 1, 1] [2020-08-19 06:49:10,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:49:10,131 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-19 06:49:10,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583384586] [2020-08-19 06:49:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:10,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583384586] [2020-08-19 06:49:10,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957243355] [2020-08-19 06:49:10,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,158 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-19 06:49:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,224 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-19 06:49:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 06:49:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,236 INFO L225 Difference]: With dead ends: 3596 [2020-08-19 06:49:10,237 INFO L226 Difference]: Without dead ends: 2090 [2020-08-19 06:49:10,241 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 [2020-08-19 06:49:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-19 06:49:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-19 06:49:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-19 06:49:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-19 06:49:10,327 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-19 06:49:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,328 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-19 06:49:10,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-19 06:49:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:49:10,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,332 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, 1, 1, 1, 1] [2020-08-19 06:49:10,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:49:10,333 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-19 06:49:10,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378475652] [2020-08-19 06:49:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:10,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378475652] [2020-08-19 06:49:10,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596188021] [2020-08-19 06:49:10,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,360 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-19 06:49:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,453 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-19 06:49:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 06:49:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,468 INFO L225 Difference]: With dead ends: 3132 [2020-08-19 06:49:10,468 INFO L226 Difference]: Without dead ends: 2122 [2020-08-19 06:49:10,472 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 [2020-08-19 06:49:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-19 06:49:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-19 06:49:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-19 06:49:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-19 06:49:10,549 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-19 06:49:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,549 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-19 06:49:10,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-19 06:49:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:49:10,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,552 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, 1, 1, 1, 1] [2020-08-19 06:49:10,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:49:10,552 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-19 06:49:10,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985279886] [2020-08-19 06:49:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:10,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985279886] [2020-08-19 06:49:10,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963674612] [2020-08-19 06:49:10,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,575 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-19 06:49:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,636 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-19 06:49:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 06:49:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,656 INFO L225 Difference]: With dead ends: 3724 [2020-08-19 06:49:10,656 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 06:49:10,658 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 [2020-08-19 06:49:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 06:49:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-19 06:49:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-19 06:49:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-19 06:49:10,742 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-19 06:49:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:10,742 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-19 06:49:10,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-19 06:49:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:49:10,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:10,748 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, 1, 1, 1, 1] [2020-08-19 06:49:10,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:49:10,748 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-19 06:49:10,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:10,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789539221] [2020-08-19 06:49:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:10,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789539221] [2020-08-19 06:49:10,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:10,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:10,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649020417] [2020-08-19 06:49:10,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:10,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:10,774 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-19 06:49:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:10,847 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-19 06:49:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:10,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 06:49:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:10,868 INFO L225 Difference]: With dead ends: 7116 [2020-08-19 06:49:10,868 INFO L226 Difference]: Without dead ends: 4106 [2020-08-19 06:49:10,875 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 [2020-08-19 06:49:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-19 06:49:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-19 06:49:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-19 06:49:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-19 06:49:11,030 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-19 06:49:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,030 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-19 06:49:11,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-19 06:49:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:49:11,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,036 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, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:49:11,039 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-19 06:49:11,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102510996] [2020-08-19 06:49:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102510996] [2020-08-19 06:49:11,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822180341] [2020-08-19 06:49:11,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,062 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-19 06:49:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,128 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-19 06:49:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 06:49:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,172 INFO L225 Difference]: With dead ends: 6156 [2020-08-19 06:49:11,172 INFO L226 Difference]: Without dead ends: 4170 [2020-08-19 06:49:11,188 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 [2020-08-19 06:49:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-19 06:49:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-19 06:49:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-19 06:49:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-19 06:49:11,326 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-19 06:49:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,326 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-19 06:49:11,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-19 06:49:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:49:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,332 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, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:49:11,332 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-19 06:49:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715150644] [2020-08-19 06:49:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715150644] [2020-08-19 06:49:11,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701377503] [2020-08-19 06:49:11,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,360 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-19 06:49:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,473 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-19 06:49:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 06:49:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,493 INFO L225 Difference]: With dead ends: 12108 [2020-08-19 06:49:11,493 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 06:49:11,504 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 [2020-08-19 06:49:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 06:49:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-19 06:49:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 06:49:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-19 06:49:11,743 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-19 06:49:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,743 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-19 06:49:11,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-19 06:49:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:49:11,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,752 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, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:49:11,753 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-19 06:49:11,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517189340] [2020-08-19 06:49:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517189340] [2020-08-19 06:49:11,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615667038] [2020-08-19 06:49:11,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,808 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-19 06:49:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,916 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-19 06:49:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 06:49:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,933 INFO L225 Difference]: With dead ends: 9100 [2020-08-19 06:49:11,933 INFO L226 Difference]: Without dead ends: 9098 [2020-08-19 06:49:11,937 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 [2020-08-19 06:49:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-19 06:49:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-19 06:49:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 06:49:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-19 06:49:12,154 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-19 06:49:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,154 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-19 06:49:12,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-19 06:49:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:49:12,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,166 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, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:49:12,167 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-19 06:49:12,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024388982] [2020-08-19 06:49:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024388982] [2020-08-19 06:49:12,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658706990] [2020-08-19 06:49:12,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,189 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-19 06:49:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,314 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-19 06:49:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 06:49:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,338 INFO L225 Difference]: With dead ends: 13708 [2020-08-19 06:49:12,338 INFO L226 Difference]: Without dead ends: 13706 [2020-08-19 06:49:12,344 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 [2020-08-19 06:49:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-19 06:49:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-19 06:49:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-19 06:49:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-19 06:49:12,715 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-19 06:49:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,715 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-19 06:49:12,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-19 06:49:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:49:12,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,737 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, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 06:49:12,737 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-19 06:49:12,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539580717] [2020-08-19 06:49:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539580717] [2020-08-19 06:49:12,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527063087] [2020-08-19 06:49:12,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,768 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-19 06:49:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,948 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-19 06:49:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 06:49:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,977 INFO L225 Difference]: With dead ends: 27788 [2020-08-19 06:49:12,977 INFO L226 Difference]: Without dead ends: 15754 [2020-08-19 06:49:13,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-19 06:49:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-19 06:49:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-19 06:49:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-19 06:49:13,520 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-19 06:49:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:13,521 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-19 06:49:13,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-19 06:49:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 06:49:13,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:13,539 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:13,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 06:49:13,540 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:13,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-19 06:49:13,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:13,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938713814] [2020-08-19 06:49:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:13,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:13,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938713814] [2020-08-19 06:49:13,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:13,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:13,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713779035] [2020-08-19 06:49:13,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:13,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:13,575 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-19 06:49:13,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:13,735 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-19 06:49:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:13,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 06:49:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:13,766 INFO L225 Difference]: With dead ends: 23820 [2020-08-19 06:49:13,766 INFO L226 Difference]: Without dead ends: 16138 [2020-08-19 06:49:13,784 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 [2020-08-19 06:49:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-19 06:49:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-19 06:49:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-19 06:49:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-19 06:49:14,639 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-19 06:49:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:14,639 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-19 06:49:14,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-19 06:49:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 06:49:14,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:14,660 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:14,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 06:49:14,660 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-19 06:49:14,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:14,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880125691] [2020-08-19 06:49:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:14,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:14,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880125691] [2020-08-19 06:49:14,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:14,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:14,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303774734] [2020-08-19 06:49:14,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:14,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:14,686 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-19 06:49:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:14,932 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-19 06:49:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:14,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 06:49:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:14,983 INFO L225 Difference]: With dead ends: 26636 [2020-08-19 06:49:14,984 INFO L226 Difference]: Without dead ends: 26634 [2020-08-19 06:49:14,995 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 [2020-08-19 06:49:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-19 06:49:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-19 06:49:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-19 06:49:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-19 06:49:15,585 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-19 06:49:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:15,585 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-19 06:49:15,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-19 06:49:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 06:49:15,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:15,627 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:15,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 06:49:15,628 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-19 06:49:15,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:15,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061327095] [2020-08-19 06:49:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:15,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061327095] [2020-08-19 06:49:15,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:15,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:15,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567898522] [2020-08-19 06:49:15,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:15,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:15,657 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-19 06:49:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:15,971 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-19 06:49:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:15,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 06:49:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:16,010 INFO L225 Difference]: With dead ends: 55308 [2020-08-19 06:49:16,010 INFO L226 Difference]: Without dead ends: 31242 [2020-08-19 06:49:16,054 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 [2020-08-19 06:49:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-19 06:49:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-19 06:49:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-19 06:49:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-19 06:49:16,796 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-19 06:49:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:16,796 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-19 06:49:16,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-19 06:49:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:49:16,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:16,830 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:16,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 06:49:16,830 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:16,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-19 06:49:16,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:16,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476163032] [2020-08-19 06:49:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:16,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:16,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476163032] [2020-08-19 06:49:16,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:16,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:16,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806054738] [2020-08-19 06:49:16,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:16,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:16,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:16,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:16,863 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-19 06:49:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:17,486 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-19 06:49:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:17,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 06:49:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:17,521 INFO L225 Difference]: With dead ends: 46860 [2020-08-19 06:49:17,522 INFO L226 Difference]: Without dead ends: 31754 [2020-08-19 06:49:17,548 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 [2020-08-19 06:49:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-19 06:49:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-19 06:49:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-19 06:49:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-19 06:49:18,066 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-19 06:49:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:18,066 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-19 06:49:18,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-19 06:49:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:49:18,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:18,109 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:18,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 06:49:18,110 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-19 06:49:18,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:18,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344753555] [2020-08-19 06:49:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:18,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344753555] [2020-08-19 06:49:18,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:18,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:18,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780450894] [2020-08-19 06:49:18,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:18,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:18,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:18,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:18,131 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-19 06:49:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:18,798 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-19 06:49:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:18,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 06:49:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:18,859 INFO L225 Difference]: With dead ends: 51210 [2020-08-19 06:49:18,859 INFO L226 Difference]: Without dead ends: 51208 [2020-08-19 06:49:18,869 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 [2020-08-19 06:49:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-19 06:49:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-19 06:49:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-19 06:49:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-19 06:49:19,504 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-19 06:49:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:19,504 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-19 06:49:19,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-19 06:49:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 06:49:19,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:19,578 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:19,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 06:49:19,578 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-19 06:49:19,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:19,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384124312] [2020-08-19 06:49:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:19,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384124312] [2020-08-19 06:49:20,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:20,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:20,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590953483] [2020-08-19 06:49:20,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:20,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:20,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:20,443 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-19 06:49:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:21,122 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-19 06:49:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:21,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 06:49:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:21,123 INFO L225 Difference]: With dead ends: 109576 [2020-08-19 06:49:21,123 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:49:21,211 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 [2020-08-19 06:49:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:49:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:49:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:49:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:49:21,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-19 06:49:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:21,213 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:49:21,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:49:21,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:49:21,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 06:49:21,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:49:21,246 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:49:21,246 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:21,246 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:21,246 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:49:21,246 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:49:21,246 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:49:21,246 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-19 06:49:21,247 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,248 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,249 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-19 06:49:21,250 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,252 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,253 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-19 06:49:21,253 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-19 06:49:21,253 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-19 06:49:21,253 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-19 06:49:21,253 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,253 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,253 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,254 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,255 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,255 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-19 06:49:21,255 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-19 06:49:21,255 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,255 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 06:49:21,255 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-19 06:49:21,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:49:21 BoogieIcfgContainer [2020-08-19 06:49:21,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:49:21,278 INFO L168 Benchmark]: Toolchain (without parser) took 14187.00 ms. Allocated memory was 148.9 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 104.8 MB in the beginning and 633.8 MB in the end (delta: -529.1 MB). Peak memory consumption was 476.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:21,286 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 06:49:21,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.03 ms. Allocated memory is still 148.9 MB. Free memory was 104.5 MB in the beginning and 93.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:21,287 INFO L168 Benchmark]: Boogie Preprocessor took 156.47 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 93.5 MB in the beginning and 181.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:21,287 INFO L168 Benchmark]: RCFGBuilder took 374.74 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 162.2 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:21,287 INFO L168 Benchmark]: TraceAbstraction took 13390.34 ms. Allocated memory was 204.5 MB in the beginning and 1.2 GB in the end (delta: 949.5 MB). Free memory was 161.5 MB in the beginning and 633.8 MB in the end (delta: -472.3 MB). Peak memory consumption was 477.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:21,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.03 ms. Allocated memory is still 148.9 MB. Free memory was 104.5 MB in the beginning and 93.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.47 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 93.5 MB in the beginning and 181.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.74 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 162.2 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13390.34 ms. Allocated memory was 204.5 MB in the beginning and 1.2 GB in the end (delta: 949.5 MB). Free memory was 161.5 MB in the beginning and 633.8 MB in the end (delta: -472.3 MB). Peak memory consumption was 477.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...