/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=SHALLOWEST -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 [2020-08-18 20:18:32,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:18:32,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:18:32,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:18:32,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:18:32,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:18:32,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:18:32,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:18:32,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:18:32,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:18:32,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:18:32,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:18:32,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:18:32,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:18:32,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:18:32,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:18:32,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:18:32,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:18:32,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:18:32,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:18:32,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:18:32,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:18:32,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:18:32,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:18:32,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:18:32,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:18:32,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:18:32,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:18:32,559 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 [2020-08-18 20:18:32,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:18:32,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:18:32,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:18:32,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:18:32,584 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:18:32,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:18:32,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:18:32,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:18:32,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:18:32,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:18:32,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:18:32,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:18:32,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:18:32,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:18:32,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:18:32,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:18:32,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:18:32,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:18:32,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:18:32,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:18:32,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:18:32,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:18:32,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:18:32,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:18:32,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:18:32,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:18:32,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:18:32,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:18:32,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:18:32,589 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:18:32,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:18:32,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:18:32,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:18:32,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:18:32,934 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:18:32,934 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 20:18:32,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2ceb16b3/99e2e148ecb344ad92d8d1d9965d2001/FLAGa8542dcfd [2020-08-18 20:18:33,484 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:18:33,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 20:18:33,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2ceb16b3/99e2e148ecb344ad92d8d1d9965d2001/FLAGa8542dcfd [2020-08-18 20:18:33,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2ceb16b3/99e2e148ecb344ad92d8d1d9965d2001 [2020-08-18 20:18:33,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:18:33,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:18:33,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:33,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:18:33,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:18:33,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:33" (1/1) ... [2020-08-18 20:18:33,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b0c8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:33, skipping insertion in model container [2020-08-18 20:18:33,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:33" (1/1) ... [2020-08-18 20:18:33,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:18:33,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:18:34,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:34,211 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:18:34,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:34,255 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:18:34,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34 WrapperNode [2020-08-18 20:18:34,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:34,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:18:34,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:18:34,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:18:34,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... [2020-08-18 20:18:34,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:18:34,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:18:34,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:18:34,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:18:34,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:18:34,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:18:34,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:18:34,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:18:34,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:18:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:18:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:18:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:18:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:18:34,794 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:18:34,794 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 20:18:34,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:34 BoogieIcfgContainer [2020-08-18 20:18:34,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:18:34,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:18:34,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:18:34,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:18:34,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:18:33" (1/3) ... [2020-08-18 20:18:34,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3821bba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:34, skipping insertion in model container [2020-08-18 20:18:34,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:34" (2/3) ... [2020-08-18 20:18:34,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3821bba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:34, skipping insertion in model container [2020-08-18 20:18:34,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:34" (3/3) ... [2020-08-18 20:18:34,821 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 20:18:34,840 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:18:34,861 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:18:34,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:18:34,905 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:18:34,905 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:18:34,905 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:18:34,905 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:18:34,906 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:18:34,906 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:18:34,906 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:18:34,906 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:18:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 20:18:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 20:18:34,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:34,931 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] [2020-08-18 20:18:34,931 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 20:18:34,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:34,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698476484] [2020-08-18 20:18:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:35,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698476484] [2020-08-18 20:18:35,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:35,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:35,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039816514] [2020-08-18 20:18:35,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:35,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,227 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 20:18:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:35,281 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 20:18:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:35,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 20:18:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:35,296 INFO L225 Difference]: With dead ends: 93 [2020-08-18 20:18:35,296 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 20:18:35,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 20:18:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 20:18:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 20:18:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 20:18:35,344 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 20:18:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:35,345 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 20:18:35,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 20:18:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 20:18:35,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:35,346 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] [2020-08-18 20:18:35,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:18:35,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 20:18:35,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:35,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321688509] [2020-08-18 20:18:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:35,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321688509] [2020-08-18 20:18:35,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:35,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:35,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17986798] [2020-08-18 20:18:35,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:35,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,447 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 20:18:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:35,495 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 20:18:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:35,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 20:18:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:35,498 INFO L225 Difference]: With dead ends: 127 [2020-08-18 20:18:35,498 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 20:18:35,500 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 [2020-08-18 20:18:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 20:18:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 20:18:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 20:18:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 20:18:35,512 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 20:18:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:35,513 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 20:18:35,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 20:18:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:18:35,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:35,514 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] [2020-08-18 20:18:35,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:18:35,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 20:18:35,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:35,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303614125] [2020-08-18 20:18:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:35,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303614125] [2020-08-18 20:18:35,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:35,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:35,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413212710] [2020-08-18 20:18:35,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:35,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:35,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,571 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 20:18:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:35,597 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 20:18:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:35,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:18:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:35,599 INFO L225 Difference]: With dead ends: 117 [2020-08-18 20:18:35,599 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 20:18:35,600 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 [2020-08-18 20:18:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 20:18:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 20:18:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 20:18:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 20:18:35,610 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 20:18:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:35,610 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 20:18:35,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 20:18:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:18:35,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:35,612 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] [2020-08-18 20:18:35,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:18:35,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 20:18:35,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:35,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386880146] [2020-08-18 20:18:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:35,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386880146] [2020-08-18 20:18:35,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:35,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:35,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227693871] [2020-08-18 20:18:35,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:35,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,670 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 20:18:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:35,708 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 20:18:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:35,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:18:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:35,710 INFO L225 Difference]: With dead ends: 148 [2020-08-18 20:18:35,711 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 20:18:35,713 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 [2020-08-18 20:18:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 20:18:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 20:18:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 20:18:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 20:18:35,737 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 20:18:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:35,740 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 20:18:35,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 20:18:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:18:35,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:35,742 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] [2020-08-18 20:18:35,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:18:35,742 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 20:18:35,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:35,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072489842] [2020-08-18 20:18:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:35,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072489842] [2020-08-18 20:18:35,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:35,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:35,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624428007] [2020-08-18 20:18:35,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:35,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,839 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 20:18:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:35,861 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 20:18:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:35,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:18:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:35,864 INFO L225 Difference]: With dead ends: 244 [2020-08-18 20:18:35,864 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 20:18:35,866 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 [2020-08-18 20:18:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 20:18:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 20:18:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 20:18:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 20:18:35,879 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 20:18:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:35,879 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 20:18:35,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 20:18:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:18:35,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:35,881 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] [2020-08-18 20:18:35,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:18:35,882 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 20:18:35,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:35,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327847734] [2020-08-18 20:18:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:35,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327847734] [2020-08-18 20:18:35,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:35,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:35,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634296369] [2020-08-18 20:18:35,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:35,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:35,936 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 20:18:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:35,969 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 20:18:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:35,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 20:18:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:35,972 INFO L225 Difference]: With dead ends: 219 [2020-08-18 20:18:35,972 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 20:18:35,973 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 [2020-08-18 20:18:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 20:18:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 20:18:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 20:18:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 20:18:35,984 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 20:18:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:35,984 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 20:18:35,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 20:18:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:18:35,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:35,986 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] [2020-08-18 20:18:35,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:18:35,987 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 20:18:35,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:35,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254293698] [2020-08-18 20:18:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254293698] [2020-08-18 20:18:36,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073352266] [2020-08-18 20:18:36,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,026 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 20:18:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,044 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 20:18:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 20:18:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,048 INFO L225 Difference]: With dead ends: 276 [2020-08-18 20:18:36,048 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 20:18:36,049 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 [2020-08-18 20:18:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 20:18:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 20:18:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 20:18:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 20:18:36,068 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 20:18:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,068 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 20:18:36,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 20:18:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:18:36,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,070 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] [2020-08-18 20:18:36,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:18:36,074 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 20:18:36,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779128509] [2020-08-18 20:18:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779128509] [2020-08-18 20:18:36,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625569416] [2020-08-18 20:18:36,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,141 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 20:18:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,178 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 20:18:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 20:18:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,181 INFO L225 Difference]: With dead ends: 472 [2020-08-18 20:18:36,181 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 20:18:36,182 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 [2020-08-18 20:18:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 20:18:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 20:18:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 20:18:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 20:18:36,196 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 20:18:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,197 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 20:18:36,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 20:18:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:18:36,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,199 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] [2020-08-18 20:18:36,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:18:36,199 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 20:18:36,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841323665] [2020-08-18 20:18:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841323665] [2020-08-18 20:18:36,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975728125] [2020-08-18 20:18:36,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,257 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 20:18:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,279 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 20:18:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 20:18:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,282 INFO L225 Difference]: With dead ends: 420 [2020-08-18 20:18:36,282 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 20:18:36,283 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 [2020-08-18 20:18:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 20:18:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 20:18:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 20:18:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 20:18:36,295 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 20:18:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,295 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 20:18:36,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 20:18:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:18:36,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,298 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] [2020-08-18 20:18:36,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:18:36,298 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,299 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 20:18:36,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289544138] [2020-08-18 20:18:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289544138] [2020-08-18 20:18:36,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844617155] [2020-08-18 20:18:36,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,336 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 20:18:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,357 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 20:18:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 20:18:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,361 INFO L225 Difference]: With dead ends: 524 [2020-08-18 20:18:36,361 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 20:18:36,362 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 [2020-08-18 20:18:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 20:18:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 20:18:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 20:18:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 20:18:36,376 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 20:18:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,377 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 20:18:36,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 20:18:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:18:36,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,379 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] [2020-08-18 20:18:36,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:18:36,379 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 20:18:36,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089342221] [2020-08-18 20:18:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089342221] [2020-08-18 20:18:36,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220561363] [2020-08-18 20:18:36,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,409 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 20:18:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,447 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 20:18:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 20:18:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,452 INFO L225 Difference]: With dead ends: 924 [2020-08-18 20:18:36,452 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 20:18:36,454 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 [2020-08-18 20:18:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 20:18:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 20:18:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 20:18:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 20:18:36,472 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 20:18:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,473 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 20:18:36,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 20:18:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:36,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,475 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] [2020-08-18 20:18:36,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:18:36,475 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 20:18:36,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12606016] [2020-08-18 20:18:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12606016] [2020-08-18 20:18:36,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270472306] [2020-08-18 20:18:36,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,507 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 20:18:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,529 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 20:18:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 20:18:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,533 INFO L225 Difference]: With dead ends: 816 [2020-08-18 20:18:36,533 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 20:18:36,534 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 [2020-08-18 20:18:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 20:18:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 20:18:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 20:18:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 20:18:36,552 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 20:18:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,553 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 20:18:36,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 20:18:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:36,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,555 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] [2020-08-18 20:18:36,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 20:18:36,555 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 20:18:36,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191644802] [2020-08-18 20:18:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191644802] [2020-08-18 20:18:36,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655263564] [2020-08-18 20:18:36,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,585 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 20:18:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,616 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 20:18:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 20:18:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,622 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 20:18:36,622 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 20:18:36,623 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 [2020-08-18 20:18:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 20:18:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 20:18:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 20:18:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 20:18:36,652 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 20:18:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,652 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 20:18:36,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 20:18:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:36,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,655 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] [2020-08-18 20:18:36,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 20:18:36,655 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 20:18:36,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342701029] [2020-08-18 20:18:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342701029] [2020-08-18 20:18:36,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501980704] [2020-08-18 20:18:36,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,689 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 20:18:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,724 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 20:18:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 20:18:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,731 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 20:18:36,732 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 20:18:36,734 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 [2020-08-18 20:18:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 20:18:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 20:18:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 20:18:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 20:18:36,780 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 20:18:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,781 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 20:18:36,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 20:18:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:18:36,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,783 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] [2020-08-18 20:18:36,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 20:18:36,783 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 20:18:36,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015756064] [2020-08-18 20:18:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015756064] [2020-08-18 20:18:36,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146121427] [2020-08-18 20:18:36,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,807 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 20:18:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,834 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 20:18:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 20:18:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,840 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 20:18:36,840 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 20:18:36,842 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 [2020-08-18 20:18:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 20:18:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 20:18:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 20:18:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 20:18:36,873 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 20:18:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,874 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 20:18:36,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 20:18:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:18:36,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,876 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] [2020-08-18 20:18:36,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 20:18:36,876 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 20:18:36,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658259470] [2020-08-18 20:18:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:36,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658259470] [2020-08-18 20:18:36,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:36,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:36,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480992077] [2020-08-18 20:18:36,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:36,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:36,903 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 20:18:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:36,937 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 20:18:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:36,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 20:18:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:36,947 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 20:18:36,947 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 20:18:36,948 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 [2020-08-18 20:18:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 20:18:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 20:18:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 20:18:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 20:18:36,991 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 20:18:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:36,991 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 20:18:36,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 20:18:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:18:36,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:36,995 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] [2020-08-18 20:18:36,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 20:18:36,995 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 20:18:36,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:36,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105362234] [2020-08-18 20:18:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:37,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105362234] [2020-08-18 20:18:37,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:37,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:37,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494422768] [2020-08-18 20:18:37,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:37,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:37,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:37,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:37,017 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 20:18:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:37,066 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 20:18:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:37,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 20:18:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:37,077 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 20:18:37,077 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 20:18:37,080 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 [2020-08-18 20:18:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 20:18:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 20:18:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 20:18:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 20:18:37,139 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 20:18:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:37,140 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 20:18:37,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 20:18:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:18:37,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:37,143 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] [2020-08-18 20:18:37,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 20:18:37,144 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:37,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 20:18:37,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:37,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869185258] [2020-08-18 20:18:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:37,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869185258] [2020-08-18 20:18:37,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:37,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:37,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137101329] [2020-08-18 20:18:37,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:37,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:37,166 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 20:18:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:37,222 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 20:18:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:37,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 20:18:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:37,237 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 20:18:37,237 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 20:18:37,241 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 [2020-08-18 20:18:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 20:18:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 20:18:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 20:18:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 20:18:37,367 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 20:18:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:37,368 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 20:18:37,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 20:18:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:18:37,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:37,372 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, 1, 1, 1] [2020-08-18 20:18:37,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 20:18:37,373 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 20:18:37,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:37,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092329127] [2020-08-18 20:18:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:37,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092329127] [2020-08-18 20:18:37,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:37,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:37,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58429942] [2020-08-18 20:18:37,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:37,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:37,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:37,409 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 20:18:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:37,483 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 20:18:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:37,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 20:18:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:37,505 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 20:18:37,505 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 20:18:37,507 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 [2020-08-18 20:18:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 20:18:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 20:18:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 20:18:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 20:18:37,626 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 20:18:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:37,627 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 20:18:37,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 20:18:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:18:37,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:37,635 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] [2020-08-18 20:18:37,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 20:18:37,636 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 20:18:37,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:37,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252441473] [2020-08-18 20:18:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:37,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252441473] [2020-08-18 20:18:37,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:37,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:37,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990714443] [2020-08-18 20:18:37,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:37,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:37,666 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 20:18:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:37,767 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 20:18:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:37,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 20:18:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:37,788 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 20:18:37,789 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 20:18:37,796 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 [2020-08-18 20:18:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 20:18:37,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 20:18:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 20:18:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 20:18:37,950 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 20:18:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:37,950 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 20:18:37,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:37,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 20:18:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 20:18:37,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:37,956 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] [2020-08-18 20:18:37,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 20:18:37,956 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 20:18:37,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:37,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627856061] [2020-08-18 20:18:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:37,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627856061] [2020-08-18 20:18:37,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:37,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:37,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72543135] [2020-08-18 20:18:37,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:37,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:37,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:37,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:37,980 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 20:18:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:38,052 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 20:18:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:38,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 20:18:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:38,073 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 20:18:38,073 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 20:18:38,078 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 [2020-08-18 20:18:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 20:18:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 20:18:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 20:18:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 20:18:38,195 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 20:18:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:38,196 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 20:18:38,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 20:18:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 20:18:38,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:38,201 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] [2020-08-18 20:18:38,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 20:18:38,201 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 20:18:38,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:38,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459328523] [2020-08-18 20:18:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:38,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:38,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459328523] [2020-08-18 20:18:38,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:38,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:38,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803588376] [2020-08-18 20:18:38,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:38,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:38,224 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 20:18:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:38,341 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 20:18:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:38,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 20:18:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:38,358 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 20:18:38,359 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 20:18:38,367 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 [2020-08-18 20:18:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 20:18:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 20:18:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 20:18:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 20:18:38,615 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 20:18:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:38,615 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 20:18:38,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 20:18:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 20:18:38,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:38,625 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] [2020-08-18 20:18:38,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 20:18:38,625 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 20:18:38,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:38,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497222360] [2020-08-18 20:18:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:38,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:38,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497222360] [2020-08-18 20:18:38,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:38,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:38,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734966217] [2020-08-18 20:18:38,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:38,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:38,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:38,663 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 20:18:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:38,791 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 20:18:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:38,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 20:18:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:38,809 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 20:18:38,809 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 20:18:38,813 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 [2020-08-18 20:18:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 20:18:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 20:18:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 20:18:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 20:18:39,063 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 20:18:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:39,063 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 20:18:39,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 20:18:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 20:18:39,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:39,073 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, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:39,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 20:18:39,074 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 20:18:39,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:39,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777469765] [2020-08-18 20:18:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:39,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:39,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777469765] [2020-08-18 20:18:39,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:39,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:39,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689155504] [2020-08-18 20:18:39,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:39,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:39,106 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 20:18:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:39,252 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 20:18:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:39,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 20:18:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:39,279 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 20:18:39,280 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 20:18:39,286 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 [2020-08-18 20:18:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 20:18:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 20:18:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 20:18:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 20:18:39,556 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 20:18:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:39,556 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 20:18:39,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 20:18:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 20:18:39,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:39,575 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] [2020-08-18 20:18:39,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 20:18:39,575 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 20:18:39,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:39,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191738260] [2020-08-18 20:18:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:39,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:39,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191738260] [2020-08-18 20:18:39,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:39,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:39,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663436589] [2020-08-18 20:18:39,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:39,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:39,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:39,604 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 20:18:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:39,896 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 20:18:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:39,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 20:18:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:39,924 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 20:18:39,924 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 20:18:39,948 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 [2020-08-18 20:18:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 20:18:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 20:18:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 20:18:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 20:18:40,401 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 20:18:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:40,401 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 20:18:40,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 20:18:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 20:18:40,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:40,421 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] [2020-08-18 20:18:40,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 20:18:40,421 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 20:18:40,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:40,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514232702] [2020-08-18 20:18:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:40,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:40,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514232702] [2020-08-18 20:18:40,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:40,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:40,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423883080] [2020-08-18 20:18:40,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:40,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:40,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:40,446 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 20:18:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:40,616 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 20:18:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:40,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 20:18:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:40,644 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 20:18:40,645 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 20:18:40,662 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 [2020-08-18 20:18:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 20:18:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 20:18:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 20:18:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 20:18:40,966 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 20:18:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:40,967 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 20:18:40,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 20:18:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 20:18:40,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:40,991 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] [2020-08-18 20:18:40,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 20:18:40,991 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 20:18:40,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:40,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071516777] [2020-08-18 20:18:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:41,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:41,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071516777] [2020-08-18 20:18:41,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:41,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:41,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767282370] [2020-08-18 20:18:41,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:41,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:41,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:41,016 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 20:18:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:41,656 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 20:18:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:41,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 20:18:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:41,706 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 20:18:41,706 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 20:18:41,715 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 [2020-08-18 20:18:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 20:18:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 20:18:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 20:18:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 20:18:42,238 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 20:18:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,238 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 20:18:42,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 20:18:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 20:18:42,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,278 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] [2020-08-18 20:18:42,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 20:18:42,278 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 20:18:42,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678400642] [2020-08-18 20:18:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678400642] [2020-08-18 20:18:42,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742563315] [2020-08-18 20:18:42,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,306 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 20:18:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,613 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 20:18:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 20:18:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,671 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 20:18:42,671 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 20:18:42,714 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 [2020-08-18 20:18:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 20:18:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 20:18:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 20:18:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 20:18:43,448 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 20:18:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,448 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 20:18:43,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 20:18:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 20:18:43,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,477 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] [2020-08-18 20:18:43,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 20:18:43,477 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 20:18:43,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795355947] [2020-08-18 20:18:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795355947] [2020-08-18 20:18:43,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393441753] [2020-08-18 20:18:43,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,506 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 20:18:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,790 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 20:18:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 20:18:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,881 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 20:18:43,881 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 20:18:43,916 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 [2020-08-18 20:18:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 20:18:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 20:18:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 20:18:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 20:18:45,501 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 20:18:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:45,501 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 20:18:45,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 20:18:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 20:18:45,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:45,527 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] [2020-08-18 20:18:45,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 20:18:45,527 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:45,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 20:18:45,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:45,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974899019] [2020-08-18 20:18:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:45,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:45,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974899019] [2020-08-18 20:18:45,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:45,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:45,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495823411] [2020-08-18 20:18:45,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:45,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:45,556 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 20:18:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:46,069 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 20:18:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:46,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 20:18:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:46,197 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 20:18:46,197 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 20:18:46,218 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 [2020-08-18 20:18:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 20:18:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 20:18:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 20:18:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 20:18:47,194 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 20:18:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:47,194 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 20:18:47,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 20:18:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 20:18:47,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:47,245 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] [2020-08-18 20:18:47,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 20:18:47,245 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 20:18:47,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:47,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498299888] [2020-08-18 20:18:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:47,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498299888] [2020-08-18 20:18:47,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:47,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:47,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130735012] [2020-08-18 20:18:47,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:47,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:47,278 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 20:18:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:48,304 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 20:18:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:48,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 20:18:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:48,305 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 20:18:48,305 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:18:48,390 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 [2020-08-18 20:18:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:18:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:18:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:18:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:18:48,391 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 20:18:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:48,391 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:18:48,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:18:48,391 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:18:48,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 20:18:48,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:18:48,421 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 20:18:48,421 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:48,421 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:48,421 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:18:48,421 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:18:48,422 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:18:48,422 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 20:18:48,422 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 20:18:48,422 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 20:18:48,422 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 20:18:48,422 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 20:18:48,422 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 20:18:48,423 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,424 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 20:18:48,425 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 20:18:48,425 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 20:18:48,426 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,427 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 20:18:48,427 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 20:18:48,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:18:48 BoogieIcfgContainer [2020-08-18 20:18:48,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:18:48,442 INFO L168 Benchmark]: Toolchain (without parser) took 14567.45 ms. Allocated memory was 141.6 MB in the beginning and 1.1 GB in the end (delta: 945.3 MB). Free memory was 104.7 MB in the beginning and 604.5 MB in the end (delta: -499.8 MB). Peak memory consumption was 445.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:48,442 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 20:18:48,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.62 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:48,443 INFO L168 Benchmark]: Boogie Preprocessor took 125.95 ms. Allocated memory was 141.6 MB in the beginning and 201.9 MB in the end (delta: 60.3 MB). Free memory was 93.1 MB in the beginning and 179.4 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:48,444 INFO L168 Benchmark]: RCFGBuilder took 415.75 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 158.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:48,444 INFO L168 Benchmark]: TraceAbstraction took 13638.60 ms. Allocated memory was 201.9 MB in the beginning and 1.1 GB in the end (delta: 885.0 MB). Free memory was 158.3 MB in the beginning and 604.5 MB in the end (delta: -446.2 MB). Peak memory consumption was 438.8 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:48,447 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 377.62 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.95 ms. Allocated memory was 141.6 MB in the beginning and 201.9 MB in the end (delta: 60.3 MB). Free memory was 93.1 MB in the beginning and 179.4 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.75 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 158.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13638.60 ms. Allocated memory was 201.9 MB in the beginning and 1.1 GB in the end (delta: 885.0 MB). Free memory was 158.3 MB in the beginning and 604.5 MB in the end (delta: -446.2 MB). Peak memory consumption was 438.8 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: 13.4s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.4s, 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, 0.7s 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: 6.2s 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...