/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:45:51,255 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 19:45:51,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:45:51,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:45:51,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:45:51,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:45:51,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:45:51,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:45:51,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:45:51,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:45:51,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:45:51,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:45:51,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:45:51,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:45:51,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:45:51,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:45:51,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:45:51,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:45:51,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:45:51,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:45:51,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:45:51,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:45:51,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 19:45:51,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:45:51,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:45:51,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:45:51,347 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 19:45:51,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:45:51,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:45:51,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:45:51,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:45:51,369 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:45:51,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:45:51,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:45:51,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:45:51,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:45:51,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:45:51,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:45:51,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:45:51,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:45:51,371 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:45:51,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:45:51,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:45:51,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:45:51,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:45:51,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:45:51,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:45:51,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:45:51,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:51,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:45:51,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:45:51,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:45:51,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:45:51,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:45:51,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:45:51,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:45:51,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:45:51,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:45:51,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:45:51,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:45:51,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:45:51,696 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:45:51,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 19:45:51,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b47e2ec0b/763c9304452a40d4bd81375da6ab799c/FLAG199307f9f [2020-08-21 19:45:52,201 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:45:52,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 19:45:52,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b47e2ec0b/763c9304452a40d4bd81375da6ab799c/FLAG199307f9f [2020-08-21 19:45:52,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b47e2ec0b/763c9304452a40d4bd81375da6ab799c [2020-08-21 19:45:52,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:45:52,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:45:52,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:52,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:45:52,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:45:52,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52, skipping insertion in model container [2020-08-21 19:45:52,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:45:52,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:45:52,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:52,805 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:45:52,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:52,837 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:45:52,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52 WrapperNode [2020-08-21 19:45:52,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:52,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:45:52,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:45:52,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:45:52,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (1/1) ... [2020-08-21 19:45:52,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:45:52,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:45:52,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:45:52,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:45:52,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (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 19:45:53,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:45:53,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:45:53,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:45:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:45:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:45:53,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:45:53,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:45:53,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:45:53,291 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:45:53,291 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:45:53,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:53 BoogieIcfgContainer [2020-08-21 19:45:53,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:45:53,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:45:53,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:45:53,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:45:53,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:45:52" (1/3) ... [2020-08-21 19:45:53,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc43140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:53, skipping insertion in model container [2020-08-21 19:45:53,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:52" (2/3) ... [2020-08-21 19:45:53,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc43140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:53, skipping insertion in model container [2020-08-21 19:45:53,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:53" (3/3) ... [2020-08-21 19:45:53,304 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-21 19:45:53,316 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:45:53,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:45:53,338 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:45:53,363 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:45:53,364 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:45:53,364 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:45:53,364 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:45:53,364 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:45:53,364 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:45:53,365 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:45:53,365 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:45:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 19:45:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:45:53,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:53,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:53,393 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:53,400 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-21 19:45:53,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:53,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898589153] [2020-08-21 19:45:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,619 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 19:45:53,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898589153] [2020-08-21 19:45:53,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:53,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:53,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163155598] [2020-08-21 19:45:53,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:53,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:53,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:53,646 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 19:45:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:53,713 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-21 19:45:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:53,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 19:45:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:53,728 INFO L225 Difference]: With dead ends: 75 [2020-08-21 19:45:53,728 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 19:45:53,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 19:45:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-21 19:45:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 19:45:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-21 19:45:53,778 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-21 19:45:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:53,779 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-21 19:45:53,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-21 19:45:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:45:53,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:53,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:53,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:45:53,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-21 19:45:53,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:53,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705605148] [2020-08-21 19:45:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,840 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 19:45:53,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705605148] [2020-08-21 19:45:53,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:53,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:53,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237906917] [2020-08-21 19:45:53,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:53,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:53,844 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-21 19:45:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:53,874 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-21 19:45:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:53,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 19:45:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:53,877 INFO L225 Difference]: With dead ends: 97 [2020-08-21 19:45:53,877 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 19:45:53,879 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 19:45:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 19:45:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-21 19:45:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 19:45:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-21 19:45:53,891 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-21 19:45:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:53,893 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-21 19:45:53,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-21 19:45:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:53,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:53,895 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 19:45:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:45:53,897 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-21 19:45:53,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:53,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046102945] [2020-08-21 19:45:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:53,986 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 19:45:53,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046102945] [2020-08-21 19:45:53,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:53,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:53,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595890283] [2020-08-21 19:45:53,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:53,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:53,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:53,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:53,994 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-21 19:45:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,027 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-21 19:45:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,030 INFO L225 Difference]: With dead ends: 90 [2020-08-21 19:45:54,030 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 19:45:54,031 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 19:45:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 19:45:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 19:45:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 19:45:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-21 19:45:54,045 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-21 19:45:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,046 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-21 19:45:54,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-21 19:45:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:54,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,049 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 19:45:54,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:45:54,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-21 19:45:54,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483708391] [2020-08-21 19:45:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,127 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 19:45:54,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483708391] [2020-08-21 19:45:54,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575831184] [2020-08-21 19:45:54,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,129 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-21 19:45:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,148 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-21 19:45:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,151 INFO L225 Difference]: With dead ends: 112 [2020-08-21 19:45:54,151 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 19:45:54,151 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 19:45:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 19:45:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-21 19:45:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 19:45:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-21 19:45:54,163 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-21 19:45:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,164 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-21 19:45:54,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-21 19:45:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:54,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,165 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 19:45:54,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:45:54,166 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-21 19:45:54,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147940718] [2020-08-21 19:45:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,197 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 19:45:54,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147940718] [2020-08-21 19:45:54,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536749506] [2020-08-21 19:45:54,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,200 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-21 19:45:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,220 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-21 19:45:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,223 INFO L225 Difference]: With dead ends: 184 [2020-08-21 19:45:54,223 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 19:45:54,224 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 19:45:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 19:45:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-21 19:45:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 19:45:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-21 19:45:54,235 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-21 19:45:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,236 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-21 19:45:54,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-21 19:45:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:45:54,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,238 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 19:45:54,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:45:54,238 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-21 19:45:54,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202227599] [2020-08-21 19:45:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,285 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 19:45:54,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202227599] [2020-08-21 19:45:54,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440861591] [2020-08-21 19:45:54,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,288 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-21 19:45:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,310 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-21 19:45:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 19:45:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,312 INFO L225 Difference]: With dead ends: 165 [2020-08-21 19:45:54,313 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 19:45:54,313 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 19:45:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 19:45:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-21 19:45:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 19:45:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-21 19:45:54,325 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-21 19:45:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,325 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-21 19:45:54,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-21 19:45:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:45:54,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,327 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 19:45:54,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:45:54,328 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-21 19:45:54,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255522313] [2020-08-21 19:45:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,360 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 19:45:54,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255522313] [2020-08-21 19:45:54,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797131420] [2020-08-21 19:45:54,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,363 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-21 19:45:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,381 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-21 19:45:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 19:45:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,384 INFO L225 Difference]: With dead ends: 204 [2020-08-21 19:45:54,384 INFO L226 Difference]: Without dead ends: 202 [2020-08-21 19:45:54,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-21 19:45:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-21 19:45:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 19:45:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-21 19:45:54,404 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-21 19:45:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,404 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-21 19:45:54,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-21 19:45:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:45:54,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,406 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 19:45:54,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:45:54,407 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-21 19:45:54,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874898494] [2020-08-21 19:45:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:45:54,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874898494] [2020-08-21 19:45:54,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081326937] [2020-08-21 19:45:54,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,472 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-21 19:45:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,496 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-21 19:45:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 19:45:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,498 INFO L225 Difference]: With dead ends: 352 [2020-08-21 19:45:54,498 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 19:45:54,501 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 19:45:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 19:45:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-21 19:45:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 19:45:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-21 19:45:54,521 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-21 19:45:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,522 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-21 19:45:54,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-21 19:45:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:45:54,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,524 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 19:45:54,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:45:54,524 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-21 19:45:54,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716281315] [2020-08-21 19:45:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,548 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 19:45:54,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716281315] [2020-08-21 19:45:54,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040083192] [2020-08-21 19:45:54,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,550 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-21 19:45:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,572 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 19:45:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:45:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,574 INFO L225 Difference]: With dead ends: 312 [2020-08-21 19:45:54,574 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 19:45:54,575 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 19:45:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 19:45:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-21 19:45:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-21 19:45:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-21 19:45:54,593 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-21 19:45:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,594 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-21 19:45:54,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-21 19:45:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:45:54,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:54,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:45:54,600 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-21 19:45:54,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683828967] [2020-08-21 19:45:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,648 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 19:45:54,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683828967] [2020-08-21 19:45:54,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562457229] [2020-08-21 19:45:54,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,651 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-21 19:45:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,674 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-21 19:45:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:45:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,681 INFO L225 Difference]: With dead ends: 380 [2020-08-21 19:45:54,681 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 19:45:54,684 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 19:45:54,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 19:45:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-21 19:45:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 19:45:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-21 19:45:54,700 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-21 19:45:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,701 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-21 19:45:54,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-21 19:45:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:45:54,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:54,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:45:54,708 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-21 19:45:54,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819154844] [2020-08-21 19:45:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,748 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 19:45:54,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819154844] [2020-08-21 19:45:54,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946830370] [2020-08-21 19:45:54,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,751 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-21 19:45:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,795 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-21 19:45:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:45:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,799 INFO L225 Difference]: With dead ends: 684 [2020-08-21 19:45:54,799 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 19:45:54,801 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 19:45:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 19:45:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-21 19:45:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-21 19:45:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-21 19:45:54,826 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-21 19:45:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,826 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-21 19:45:54,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-21 19:45:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:45:54,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:54,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:45:54,831 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-21 19:45:54,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493663509] [2020-08-21 19:45:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,872 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 19:45:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493663509] [2020-08-21 19:45:54,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275836589] [2020-08-21 19:45:54,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,875 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-21 19:45:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:54,899 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-21 19:45:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:54,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 19:45:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:54,902 INFO L225 Difference]: With dead ends: 600 [2020-08-21 19:45:54,903 INFO L226 Difference]: Without dead ends: 410 [2020-08-21 19:45:54,904 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 19:45:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-21 19:45:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-21 19:45:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-21 19:45:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-21 19:45:54,919 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-21 19:45:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:54,921 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-21 19:45:54,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-21 19:45:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:45:54,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:54,924 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 19:45:54,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:45:54,925 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-21 19:45:54,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:54,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738347739] [2020-08-21 19:45:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:54,964 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 19:45:54,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738347739] [2020-08-21 19:45:54,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:54,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:54,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116330684] [2020-08-21 19:45:54,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:54,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:54,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:54,968 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-21 19:45:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,001 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-21 19:45:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 19:45:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,007 INFO L225 Difference]: With dead ends: 716 [2020-08-21 19:45:55,007 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 19:45:55,008 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 19:45:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 19:45:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-21 19:45:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 19:45:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-21 19:45:55,027 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-21 19:45:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,027 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-21 19:45:55,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-21 19:45:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:45:55,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,029 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 19:45:55,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:45:55,029 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-21 19:45:55,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498272199] [2020-08-21 19:45:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,071 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 19:45:55,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498272199] [2020-08-21 19:45:55,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929985282] [2020-08-21 19:45:55,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,074 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-21 19:45:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,113 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-21 19:45:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 19:45:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,120 INFO L225 Difference]: With dead ends: 1340 [2020-08-21 19:45:55,120 INFO L226 Difference]: Without dead ends: 778 [2020-08-21 19:45:55,123 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 19:45:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-21 19:45:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-21 19:45:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 19:45:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-21 19:45:55,156 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-21 19:45:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,156 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-21 19:45:55,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-21 19:45:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:45:55,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,159 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 19:45:55,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:45:55,159 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-21 19:45:55,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531176016] [2020-08-21 19:45:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,197 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 19:45:55,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531176016] [2020-08-21 19:45:55,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340419420] [2020-08-21 19:45:55,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,199 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-21 19:45:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,228 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-21 19:45:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:45:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,233 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 19:45:55,234 INFO L226 Difference]: Without dead ends: 794 [2020-08-21 19:45:55,237 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 19:45:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-21 19:45:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-21 19:45:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 19:45:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-21 19:45:55,267 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-21 19:45:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,268 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-21 19:45:55,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-21 19:45:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:45:55,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,270 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 19:45:55,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 19:45:55,270 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-21 19:45:55,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913746026] [2020-08-21 19:45:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,307 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 19:45:55,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913746026] [2020-08-21 19:45:55,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741395410] [2020-08-21 19:45:55,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,312 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-21 19:45:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,349 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-21 19:45:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:45:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,357 INFO L225 Difference]: With dead ends: 1356 [2020-08-21 19:45:55,357 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 19:45:55,358 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 19:45:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 19:45:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-21 19:45:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-21 19:45:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-21 19:45:55,410 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-21 19:45:55,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,411 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-21 19:45:55,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-21 19:45:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:45:55,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,413 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 19:45:55,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 19:45:55,414 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-21 19:45:55,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692365550] [2020-08-21 19:45:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,437 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 19:45:55,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692365550] [2020-08-21 19:45:55,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428997072] [2020-08-21 19:45:55,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,441 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-21 19:45:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,478 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-21 19:45:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:45:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,485 INFO L225 Difference]: With dead ends: 2636 [2020-08-21 19:45:55,485 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 19:45:55,488 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 19:45:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 19:45:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-21 19:45:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-21 19:45:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-21 19:45:55,533 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-21 19:45:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,534 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-21 19:45:55,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-21 19:45:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:45:55,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,537 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 19:45:55,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 19:45:55,537 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-21 19:45:55,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734318940] [2020-08-21 19:45:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,562 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 19:45:55,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734318940] [2020-08-21 19:45:55,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837996579] [2020-08-21 19:45:55,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,564 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-21 19:45:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,599 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-21 19:45:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:45:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,607 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 19:45:55,607 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 19:45:55,609 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 19:45:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 19:45:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-21 19:45:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 19:45:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-21 19:45:55,651 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-21 19:45:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,652 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-21 19:45:55,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-21 19:45:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:45:55,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,654 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 19:45:55,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 19:45:55,655 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-21 19:45:55,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146111126] [2020-08-21 19:45:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,674 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 19:45:55,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146111126] [2020-08-21 19:45:55,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474859589] [2020-08-21 19:45:55,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,676 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-21 19:45:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,725 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-21 19:45:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:45:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,736 INFO L225 Difference]: With dead ends: 2572 [2020-08-21 19:45:55,736 INFO L226 Difference]: Without dead ends: 2570 [2020-08-21 19:45:55,737 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 19:45:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-21 19:45:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-21 19:45:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-21 19:45:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-21 19:45:55,809 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-21 19:45:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:55,810 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-21 19:45:55,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-21 19:45:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:45:55,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:55,816 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 19:45:55,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 19:45:55,817 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:55,817 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-21 19:45:55,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:55,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237956601] [2020-08-21 19:45:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:55,843 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 19:45:55,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237956601] [2020-08-21 19:45:55,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:55,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:55,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870064470] [2020-08-21 19:45:55,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:55,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:55,847 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-21 19:45:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:55,978 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-21 19:45:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:55,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:45:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:55,995 INFO L225 Difference]: With dead ends: 5196 [2020-08-21 19:45:55,996 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 19:45:56,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 19:45:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-21 19:45:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-21 19:45:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-21 19:45:56,115 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-21 19:45:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,116 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-21 19:45:56,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-21 19:45:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:56,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,123 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 19:45:56,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 19:45:56,124 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,124 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-21 19:45:56,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066393506] [2020-08-21 19:45:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,145 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 19:45:56,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066393506] [2020-08-21 19:45:56,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182836507] [2020-08-21 19:45:56,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,147 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-21 19:45:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,231 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-21 19:45:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 19:45:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,247 INFO L225 Difference]: With dead ends: 4428 [2020-08-21 19:45:56,247 INFO L226 Difference]: Without dead ends: 3018 [2020-08-21 19:45:56,252 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 19:45:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-21 19:45:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-21 19:45:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 19:45:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-21 19:45:56,373 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-21 19:45:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,373 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-21 19:45:56,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-21 19:45:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:56,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,377 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 19:45:56,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 19:45:56,378 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-21 19:45:56,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580205968] [2020-08-21 19:45:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,396 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 19:45:56,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580205968] [2020-08-21 19:45:56,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261172124] [2020-08-21 19:45:56,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,398 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-21 19:45:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,524 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-21 19:45:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 19:45:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,536 INFO L225 Difference]: With dead ends: 8650 [2020-08-21 19:45:56,536 INFO L226 Difference]: Without dead ends: 3016 [2020-08-21 19:45:56,545 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 19:45:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-21 19:45:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-21 19:45:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 19:45:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-21 19:45:56,630 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-21 19:45:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,630 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-21 19:45:56,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-21 19:45:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 19:45:56,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:56,634 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 19:45:56,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 19:45:56,635 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-21 19:45:56,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:56,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204085775] [2020-08-21 19:45:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:56,656 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 19:45:56,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204085775] [2020-08-21 19:45:56,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:56,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:56,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673575869] [2020-08-21 19:45:56,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:56,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:56,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:56,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:56,657 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-21 19:45:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:56,703 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-21 19:45:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:56,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 19:45:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:56,704 INFO L225 Difference]: With dead ends: 3016 [2020-08-21 19:45:56,704 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:45:56,709 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 19:45:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:45:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:45:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:45:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:45:56,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 19:45:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:56,710 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:45:56,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:45:56,711 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:45:56,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 19:45:56,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:45:56,733 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 19:45:56,733 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:56,733 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:56,733 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:45:56,733 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:45:56,733 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:45:56,733 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-21 19:45:56,734 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-21 19:45:56,735 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-21 19:45:56,735 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-21 19:45:56,735 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-21 19:45:56,735 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,735 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,735 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,735 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,736 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-21 19:45:56,737 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,737 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,737 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-21 19:45:56,737 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-21 19:45:56,737 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 19:45:56,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:45:56 BoogieIcfgContainer [2020-08-21 19:45:56,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:45:56,750 INFO L168 Benchmark]: Toolchain (without parser) took 4140.11 ms. Allocated memory was 138.9 MB in the beginning and 303.0 MB in the end (delta: 164.1 MB). Free memory was 101.7 MB in the beginning and 199.5 MB in the end (delta: -97.8 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,751 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:45:56,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.84 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,752 INFO L168 Benchmark]: Boogie Preprocessor took 108.24 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 179.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,752 INFO L168 Benchmark]: RCFGBuilder took 348.79 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 161.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,753 INFO L168 Benchmark]: TraceAbstraction took 3450.85 ms. Allocated memory was 201.3 MB in the beginning and 303.0 MB in the end (delta: 101.7 MB). Free memory was 160.3 MB in the beginning and 199.5 MB in the end (delta: -39.2 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:56,755 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.84 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.24 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 179.2 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.79 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 161.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3450.85 ms. Allocated memory was 201.3 MB in the beginning and 303.0 MB in the end (delta: 101.7 MB). Free memory was 160.3 MB in the beginning and 199.5 MB in the end (delta: -39.2 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 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, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...