/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:07:46,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:46,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:46,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:07:46,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:07:46,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:07:46,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:07:46,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:07:46,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:07:46,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:07:46,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:07:46,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:07:46,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:46,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:46,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:47,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:47,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:47,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:47,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:47,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:47,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:47,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:47,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:47,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:47,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:07:47,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:47,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:47,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:47,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:07:47,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:47,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:47,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:47,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:47,048 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:47,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:47,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:47,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:47,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:47,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:47,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:47,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:47,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:47,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:47,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:47,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:47,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:47,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:47,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:47,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:47,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:47,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:47,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:47,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:47,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:47,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:47,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:47,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:47,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:47,052 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 -> log-additional-information=true; [2020-08-21 14:07:47,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:47,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:47,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:47,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:47,415 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:47,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 14:07:47,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f918408ca/ac45d41205b840f886ecadd5c9a6ac54/FLAG6a911b47e [2020-08-21 14:07:47,972 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:47,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 14:07:47,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f918408ca/ac45d41205b840f886ecadd5c9a6ac54/FLAG6a911b47e [2020-08-21 14:07:48,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f918408ca/ac45d41205b840f886ecadd5c9a6ac54 [2020-08-21 14:07:48,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:48,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:48,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:48,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:48,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:48,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab12f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48, skipping insertion in model container [2020-08-21 14:07:48,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:48,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:48,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:48,622 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:48,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:48,706 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:48,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48 WrapperNode [2020-08-21 14:07:48,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:48,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:48,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:48,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:48,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... [2020-08-21 14:07:48,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:48,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:48,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:48,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:48,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:48,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:07:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:49,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:49,271 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:07:49,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:49 BoogieIcfgContainer [2020-08-21 14:07:49,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:49,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:49,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:49,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:49,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:48" (1/3) ... [2020-08-21 14:07:49,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1328ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:49, skipping insertion in model container [2020-08-21 14:07:49,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:48" (2/3) ... [2020-08-21 14:07:49,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1328ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:49, skipping insertion in model container [2020-08-21 14:07:49,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:49" (3/3) ... [2020-08-21 14:07:49,285 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 14:07:49,296 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:49,305 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:49,321 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:49,353 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:49,353 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:49,353 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:49,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:49,354 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:49,355 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:49,355 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:49,355 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 14:07:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:07:49,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:49,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:49,398 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:49,408 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 14:07:49,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:49,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288152444] [2020-08-21 14:07:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:49,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288152444] [2020-08-21 14:07:49,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:49,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:49,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374359923] [2020-08-21 14:07:49,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:49,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:49,674 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 14:07:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:49,749 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 14:07:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:49,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:07:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:49,765 INFO L225 Difference]: With dead ends: 81 [2020-08-21 14:07:49,765 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 14:07:49,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 14:07:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 14:07:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 14:07:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 14:07:49,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 14:07:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:49,820 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 14:07:49,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 14:07:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:07:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:49,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:49,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:49,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 14:07:49,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:49,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487974732] [2020-08-21 14:07:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:49,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487974732] [2020-08-21 14:07:49,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:49,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:49,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567641978] [2020-08-21 14:07:49,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:49,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:49,923 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 14:07:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:49,957 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 14:07:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:49,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:07:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:49,960 INFO L225 Difference]: With dead ends: 107 [2020-08-21 14:07:49,960 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 14:07:49,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 14:07:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 14:07:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 14:07:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 14:07:49,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 14:07:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:49,973 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 14:07:49,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 14:07:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:07:49,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:49,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:49,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:49,976 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 14:07:49,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:49,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140310790] [2020-08-21 14:07:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140310790] [2020-08-21 14:07:50,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971708065] [2020-08-21 14:07:50,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,038 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 14:07:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,064 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 14:07:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:07:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,067 INFO L225 Difference]: With dead ends: 99 [2020-08-21 14:07:50,067 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 14:07:50,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 14:07:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 14:07:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 14:07:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 14:07:50,078 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 14:07:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,079 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 14:07:50,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 14:07:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:07:50,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:07:50,081 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 14:07:50,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913825492] [2020-08-21 14:07:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913825492] [2020-08-21 14:07:50,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577890740] [2020-08-21 14:07:50,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,132 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 14:07:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,160 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 14:07:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:07:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,163 INFO L225 Difference]: With dead ends: 124 [2020-08-21 14:07:50,163 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 14:07:50,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 14:07:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 14:07:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 14:07:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 14:07:50,178 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 14:07:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,178 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 14:07:50,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 14:07:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:07:50,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:07:50,180 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 14:07:50,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473610599] [2020-08-21 14:07:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473610599] [2020-08-21 14:07:50,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441483023] [2020-08-21 14:07:50,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,244 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 14:07:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,280 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 14:07:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:07:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,282 INFO L225 Difference]: With dead ends: 204 [2020-08-21 14:07:50,282 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 14:07:50,283 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 [2020-08-21 14:07:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 14:07:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 14:07:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 14:07:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 14:07:50,303 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 14:07:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,303 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 14:07:50,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 14:07:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:50,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:07:50,306 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 14:07:50,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132380670] [2020-08-21 14:07:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132380670] [2020-08-21 14:07:50,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508792138] [2020-08-21 14:07:50,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,346 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 14:07:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,367 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 14:07:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,369 INFO L225 Difference]: With dead ends: 183 [2020-08-21 14:07:50,370 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 14:07:50,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 14:07:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 14:07:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 14:07:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 14:07:50,384 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 14:07:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,385 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 14:07:50,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 14:07:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:50,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:07:50,387 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 14:07:50,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522397346] [2020-08-21 14:07:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522397346] [2020-08-21 14:07:50,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062122124] [2020-08-21 14:07:50,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,453 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 14:07:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,481 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 14:07:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,483 INFO L225 Difference]: With dead ends: 228 [2020-08-21 14:07:50,484 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 14:07:50,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 14:07:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 14:07:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 14:07:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 14:07:50,499 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 14:07:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,499 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 14:07:50,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 14:07:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:07:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:07:50,502 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 14:07:50,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715454660] [2020-08-21 14:07:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715454660] [2020-08-21 14:07:50,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065152671] [2020-08-21 14:07:50,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,535 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 14:07:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,558 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 14:07:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:07:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,561 INFO L225 Difference]: With dead ends: 392 [2020-08-21 14:07:50,561 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 14:07:50,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 14:07:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 14:07:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 14:07:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 14:07:50,578 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 14:07:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,579 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 14:07:50,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 14:07:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:50,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:07:50,582 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 14:07:50,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363327956] [2020-08-21 14:07:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363327956] [2020-08-21 14:07:50,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220652880] [2020-08-21 14:07:50,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,620 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 14:07:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,639 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 14:07:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,642 INFO L225 Difference]: With dead ends: 348 [2020-08-21 14:07:50,642 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 14:07:50,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 14:07:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 14:07:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 14:07:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 14:07:50,657 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 14:07:50,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,657 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 14:07:50,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 14:07:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:50,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:07:50,660 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 14:07:50,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048907922] [2020-08-21 14:07:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048907922] [2020-08-21 14:07:50,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728202410] [2020-08-21 14:07:50,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,718 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 14:07:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,739 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 14:07:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,743 INFO L225 Difference]: With dead ends: 428 [2020-08-21 14:07:50,743 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 14:07:50,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 14:07:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 14:07:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 14:07:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 14:07:50,760 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 14:07:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,762 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 14:07:50,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 14:07:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:07:50,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:07:50,773 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 14:07:50,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283450837] [2020-08-21 14:07:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283450837] [2020-08-21 14:07:50,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166621251] [2020-08-21 14:07:50,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,822 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 14:07:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,868 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 14:07:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:07:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,874 INFO L225 Difference]: With dead ends: 764 [2020-08-21 14:07:50,874 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 14:07:50,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 14:07:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 14:07:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 14:07:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 14:07:50,905 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 14:07:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:50,906 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 14:07:50,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 14:07:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:50,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:50,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:50,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:07:50,909 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 14:07:50,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:50,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582066607] [2020-08-21 14:07:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:50,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582066607] [2020-08-21 14:07:50,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:50,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:50,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717889143] [2020-08-21 14:07:50,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:50,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:50,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:50,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,962 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 14:07:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:50,989 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 14:07:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:50,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:50,993 INFO L225 Difference]: With dead ends: 672 [2020-08-21 14:07:50,993 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 14:07:50,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 14:07:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 14:07:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 14:07:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 14:07:51,015 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 14:07:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,016 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 14:07:51,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 14:07:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:51,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:07:51,021 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 14:07:51,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920534705] [2020-08-21 14:07:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920534705] [2020-08-21 14:07:51,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326031564] [2020-08-21 14:07:51,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,071 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 14:07:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,100 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 14:07:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,106 INFO L225 Difference]: With dead ends: 812 [2020-08-21 14:07:51,106 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 14:07:51,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 14:07:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 14:07:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 14:07:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 14:07:51,127 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 14:07:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,127 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 14:07:51,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 14:07:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:07:51,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:51,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:07:51,130 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 14:07:51,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501118502] [2020-08-21 14:07:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501118502] [2020-08-21 14:07:51,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920975017] [2020-08-21 14:07:51,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,190 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 14:07:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,219 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 14:07:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:07:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,226 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 14:07:51,226 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 14:07:51,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 14:07:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 14:07:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 14:07:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 14:07:51,259 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 14:07:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,259 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 14:07:51,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 14:07:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:51,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,261 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] [2020-08-21 14:07:51,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:07:51,262 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 14:07:51,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662023618] [2020-08-21 14:07:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662023618] [2020-08-21 14:07:51,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197707291] [2020-08-21 14:07:51,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,297 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 14:07:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,331 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 14:07:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,336 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 14:07:51,336 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 14:07:51,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 14:07:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 14:07:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 14:07:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 14:07:51,369 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 14:07:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,369 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 14:07:51,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 14:07:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:51,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,371 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] [2020-08-21 14:07:51,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:07:51,385 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 14:07:51,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140010616] [2020-08-21 14:07:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140010616] [2020-08-21 14:07:51,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760306655] [2020-08-21 14:07:51,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,410 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 14:07:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,443 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 14:07:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,451 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 14:07:51,451 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 14:07:51,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 14:07:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 14:07:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 14:07:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 14:07:51,487 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 14:07:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,487 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 14:07:51,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 14:07:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:07:51,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,490 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] [2020-08-21 14:07:51,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:07:51,491 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,491 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 14:07:51,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107568657] [2020-08-21 14:07:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107568657] [2020-08-21 14:07:51,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751750297] [2020-08-21 14:07:51,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,514 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 14:07:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,556 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 14:07:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:07:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,565 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 14:07:51,566 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 14:07:51,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 14:07:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 14:07:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 14:07:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 14:07:51,617 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 14:07:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,617 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 14:07:51,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 14:07:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:51,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,620 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] [2020-08-21 14:07:51,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:07:51,621 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 14:07:51,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052964021] [2020-08-21 14:07:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052964021] [2020-08-21 14:07:51,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560210148] [2020-08-21 14:07:51,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,643 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 14:07:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,698 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 14:07:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,706 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 14:07:51,706 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 14:07:51,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 14:07:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 14:07:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 14:07:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 14:07:51,779 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 14:07:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:51,780 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 14:07:51,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 14:07:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:51,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:51,784 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] [2020-08-21 14:07:51,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:07:51,785 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 14:07:51,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:51,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039908050] [2020-08-21 14:07:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:51,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039908050] [2020-08-21 14:07:51,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:51,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:51,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669444976] [2020-08-21 14:07:51,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:51,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,815 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 14:07:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:51,882 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 14:07:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:51,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:51,899 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 14:07:51,899 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 14:07:51,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 14:07:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 14:07:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 14:07:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 14:07:52,035 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 14:07:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:52,035 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 14:07:52,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 14:07:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:07:52,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:52,042 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] [2020-08-21 14:07:52,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:07:52,043 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:52,043 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 14:07:52,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:52,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707111409] [2020-08-21 14:07:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:52,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707111409] [2020-08-21 14:07:52,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:52,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:52,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433615311] [2020-08-21 14:07:52,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:52,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:52,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:52,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,079 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 14:07:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:52,147 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 14:07:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:52,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:07:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:52,162 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 14:07:52,162 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 14:07:52,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 14:07:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 14:07:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 14:07:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 14:07:52,269 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 14:07:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:52,269 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 14:07:52,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 14:07:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:52,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:52,275 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] [2020-08-21 14:07:52,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:07:52,275 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 14:07:52,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:52,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656512117] [2020-08-21 14:07:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:52,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656512117] [2020-08-21 14:07:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:52,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:52,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899178152] [2020-08-21 14:07:52,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:52,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:52,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:52,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,297 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 14:07:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:52,354 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 14:07:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:52,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:52,370 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 14:07:52,371 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 14:07:52,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 14:07:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 14:07:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 14:07:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 14:07:52,497 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 14:07:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:52,497 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 14:07:52,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 14:07:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:52,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:52,503 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] [2020-08-21 14:07:52,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:07:52,503 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 14:07:52,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:52,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677246418] [2020-08-21 14:07:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:52,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677246418] [2020-08-21 14:07:52,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:52,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:52,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187971075] [2020-08-21 14:07:52,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:52,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:52,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,544 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 14:07:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:52,651 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 14:07:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:52,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:52,698 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 14:07:52,698 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 14:07:52,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 14:07:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 14:07:52,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 14:07:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 14:07:52,895 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 14:07:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:52,896 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 14:07:52,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 14:07:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:07:52,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:52,906 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] [2020-08-21 14:07:52,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:07:52,906 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 14:07:52,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:52,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469968051] [2020-08-21 14:07:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:52,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469968051] [2020-08-21 14:07:52,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:52,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:52,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419338609] [2020-08-21 14:07:52,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:52,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:52,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:52,947 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 14:07:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:53,145 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 14:07:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:53,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 14:07:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:53,159 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 14:07:53,160 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 14:07:53,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 14:07:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 14:07:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 14:07:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 14:07:53,334 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 14:07:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:53,334 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 14:07:53,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 14:07:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:53,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:53,344 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] [2020-08-21 14:07:53,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:07:53,344 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 14:07:53,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:53,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377097869] [2020-08-21 14:07:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:53,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377097869] [2020-08-21 14:07:53,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:53,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:53,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599881684] [2020-08-21 14:07:53,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:53,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:53,367 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 14:07:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:53,522 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 14:07:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:53,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:53,542 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 14:07:53,542 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 14:07:53,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 14:07:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 14:07:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 14:07:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 14:07:53,791 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 14:07:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:53,791 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 14:07:53,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 14:07:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:07:53,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:53,808 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] [2020-08-21 14:07:53,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 14:07:53,808 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 14:07:53,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:53,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024601416] [2020-08-21 14:07:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:53,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024601416] [2020-08-21 14:07:53,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:53,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:53,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522734381] [2020-08-21 14:07:53,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:53,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:53,833 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 14:07:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:54,000 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 14:07:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:54,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 14:07:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:54,001 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 14:07:54,002 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:07:54,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:07:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:07:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:07:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:07:54,035 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 14:07:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:54,035 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:07:54,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:07:54,036 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:07:54,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 14:07:54,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:07:54,064 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:07:54,064 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:54,064 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:54,064 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:07:54,064 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,065 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 14:07:54,066 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,067 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,067 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 14:07:54,067 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 14:07:54,067 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 14:07:54,067 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,067 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 14:07:54,067 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,068 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 14:07:54,068 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 14:07:54,069 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,070 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 14:07:54,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:54 BoogieIcfgContainer [2020-08-21 14:07:54,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:54,094 INFO L168 Benchmark]: Toolchain (without parser) took 5741.92 ms. Allocated memory was 139.5 MB in the beginning and 334.5 MB in the end (delta: 195.0 MB). Free memory was 102.8 MB in the beginning and 113.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 184.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,095 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.39 ms. Allocated memory is still 139.5 MB. Free memory was 102.8 MB in the beginning and 92.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,096 INFO L168 Benchmark]: Boogie Preprocessor took 167.79 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,098 INFO L168 Benchmark]: RCFGBuilder took 399.53 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 162.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,102 INFO L168 Benchmark]: TraceAbstraction took 4813.20 ms. Allocated memory was 202.9 MB in the beginning and 334.5 MB in the end (delta: 131.6 MB). Free memory was 161.1 MB in the beginning and 113.4 MB in the end (delta: 47.7 MB). Peak memory consumption was 179.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:54,105 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 355.39 ms. Allocated memory is still 139.5 MB. Free memory was 102.8 MB in the beginning and 92.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 167.79 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.53 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 162.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4813.20 ms. Allocated memory was 202.9 MB in the beginning and 334.5 MB in the end (delta: 131.6 MB). Free memory was 161.1 MB in the beginning and 113.4 MB in the end (delta: 47.7 MB). Peak memory consumption was 179.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...