/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:30:10,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:30:10,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:30:10,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:30:10,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:30:10,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:30:10,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:30:10,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:30:10,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:30:10,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:30:10,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:30:10,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:30:10,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:30:10,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:30:10,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:30:10,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:30:10,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:30:10,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:30:10,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:30:10,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:30:10,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:30:10,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:30:10,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:30:10,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:30:10,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:30:10,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:30:10,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:30:10,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:30:10,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:30:10,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:30:10,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:30:10,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:30:10,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:30:10,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:30:10,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:30:10,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:30:10,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:30:10,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:30:10,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:30:10,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:30:10,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:30:10,414 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 [2020-09-21 10:30:10,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:30:10,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:30:10,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:30:10,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:30:10,463 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:30:10,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:30:10,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:30:10,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:30:10,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:30:10,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:30:10,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:30:10,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:30:10,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:30:10,466 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:30:10,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:30:10,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:30:10,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:30:10,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:30:10,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:30:10,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:30:10,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:30:10,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:30:10,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:30:10,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:30:10,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:30:10,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:30:10,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:30:10,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:30:10,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:30:10,469 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 -> false [2020-09-21 10:30:10,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:30:10,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:30:10,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:30:10,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:30:10,997 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:30:10,998 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-21 10:30:11,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24f069206/bc4b80b9f9de463599bfcc48a139af3b/FLAGd89401c41 [2020-09-21 10:30:11,653 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:30:11,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-21 10:30:11,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24f069206/bc4b80b9f9de463599bfcc48a139af3b/FLAGd89401c41 [2020-09-21 10:30:11,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24f069206/bc4b80b9f9de463599bfcc48a139af3b [2020-09-21 10:30:11,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:30:11,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:30:11,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:11,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:30:11,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:30:11,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:11" (1/1) ... [2020-09-21 10:30:11,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55833e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:11, skipping insertion in model container [2020-09-21 10:30:11,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:11" (1/1) ... [2020-09-21 10:30:11,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:30:12,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:30:12,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:12,368 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:30:12,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:12,574 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:30:12,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12 WrapperNode [2020-09-21 10:30:12,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:12,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:30:12,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:30:12,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:30:12,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (1/1) ... [2020-09-21 10:30:12,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:30:12,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:30:12,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:30:12,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:30:12,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (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 [2020-09-21 10:30:12,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:30:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:30:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:30:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:30:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-21 10:30:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 10:30:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:30:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:30:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:30:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:30:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:30:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:30:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:30:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:30:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:30:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:30:15,667 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:30:15,667 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:30:15,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:15 BoogieIcfgContainer [2020-09-21 10:30:15,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:30:15,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:30:15,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:30:15,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:30:15,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:30:11" (1/3) ... [2020-09-21 10:30:15,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505f641e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:15, skipping insertion in model container [2020-09-21 10:30:15,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:12" (2/3) ... [2020-09-21 10:30:15,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505f641e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:15, skipping insertion in model container [2020-09-21 10:30:15,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:15" (3/3) ... [2020-09-21 10:30:15,690 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-21 10:30:15,703 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:30:15,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:30:15,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:30:15,771 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:30:15,771 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:30:15,771 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:30:15,771 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:30:15,771 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:30:15,771 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:30:15,771 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:30:15,772 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:30:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 10:30:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:30:15,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:15,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:15,800 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:15,808 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2020-09-21 10:30:15,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:15,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080927198] [2020-09-21 10:30:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:16,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:16,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080927198] [2020-09-21 10:30:16,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:16,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:30:16,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104945355] [2020-09-21 10:30:16,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:30:16,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:16,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:30:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:30:16,384 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-09-21 10:30:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:18,656 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-09-21 10:30:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:30:18,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:30:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:18,682 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:30:18,682 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 10:30:18,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 10:30:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-09-21 10:30:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:30:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 10:30:18,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 10:30:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:18,732 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 10:30:18,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:30:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 10:30:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:30:18,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:18,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:18,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:30:18,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2020-09-21 10:30:18,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:18,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207147448] [2020-09-21 10:30:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:18,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:18,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207147448] [2020-09-21 10:30:18,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:18,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:30:18,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776206577] [2020-09-21 10:30:18,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:30:18,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:18,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:30:18,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:30:18,985 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-09-21 10:30:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:21,130 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-09-21 10:30:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:30:21,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:30:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:21,132 INFO L225 Difference]: With dead ends: 28 [2020-09-21 10:30:21,132 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:30:21,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:30:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:30:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-09-21 10:30:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 10:30:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 10:30:21,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-09-21 10:30:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:21,140 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 10:30:21,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:30:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 10:30:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:30:21,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:21,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:21,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:30:21,142 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2020-09-21 10:30:21,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:21,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686414781] [2020-09-21 10:30:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:21,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686414781] [2020-09-21 10:30:21,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:21,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:30:21,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368208756] [2020-09-21 10:30:21,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:30:21,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:21,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:30:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:30:21,351 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-09-21 10:30:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:25,588 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-21 10:30:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:30:25,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 10:30:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:25,590 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:30:25,590 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 10:30:25,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:30:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 10:30:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-09-21 10:30:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 10:30:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-21 10:30:25,611 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-09-21 10:30:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:25,611 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-21 10:30:25,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:30:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-21 10:30:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:30:25,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:25,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:25,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:30:25,614 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:25,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1878874992, now seen corresponding path program 2 times [2020-09-21 10:30:25,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:25,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638033419] [2020-09-21 10:30:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:25,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:25,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638033419] [2020-09-21 10:30:25,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:25,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:30:25,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379309419] [2020-09-21 10:30:25,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:30:25,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:25,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:30:25,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:25,922 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-21 10:30:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:32,215 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-21 10:30:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:30:32,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 10:30:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:32,217 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:30:32,218 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:30:32,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:30:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:30:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-09-21 10:30:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:30:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-21 10:30:32,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-09-21 10:30:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:32,236 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-21 10:30:32,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:30:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-21 10:30:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:30:32,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:32,239 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:32,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:30:32,239 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:32,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1460832712, now seen corresponding path program 3 times [2020-09-21 10:30:32,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:32,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256797616] [2020-09-21 10:30:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:32,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:32,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256797616] [2020-09-21 10:30:32,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:32,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:30:32,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319976628] [2020-09-21 10:30:32,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:30:32,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:30:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:30:32,511 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2020-09-21 10:30:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:40,865 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-09-21 10:30:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:30:40,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 10:30:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:40,867 INFO L225 Difference]: With dead ends: 52 [2020-09-21 10:30:40,867 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 10:30:40,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:30:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 10:30:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-21 10:30:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 10:30:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-21 10:30:40,882 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-09-21 10:30:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:40,883 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-21 10:30:40,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:30:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-21 10:30:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:30:40,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:40,886 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:40,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:30:40,887 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 599808768, now seen corresponding path program 4 times [2020-09-21 10:30:40,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:40,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96479127] [2020-09-21 10:30:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:41,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96479127] [2020-09-21 10:30:41,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:41,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:30:41,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244823987] [2020-09-21 10:30:41,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:30:41,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:30:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:30:41,170 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-09-21 10:30:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:51,585 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-09-21 10:30:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:30:51,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-21 10:30:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:51,587 INFO L225 Difference]: With dead ends: 58 [2020-09-21 10:30:51,587 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 10:30:51,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:30:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 10:30:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 10:30:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 10:30:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-09-21 10:30:51,595 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-09-21 10:30:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:51,596 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-09-21 10:30:51,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:30:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-09-21 10:30:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 10:30:51,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:51,598 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:51,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:30:51,598 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 431393224, now seen corresponding path program 5 times [2020-09-21 10:30:51,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:51,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404897621] [2020-09-21 10:30:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:51,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404897621] [2020-09-21 10:30:51,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:51,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:30:51,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829533339] [2020-09-21 10:30:51,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:30:51,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:30:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:30:51,868 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 10 states. [2020-09-21 10:31:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:04,323 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-09-21 10:31:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:31:04,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-21 10:31:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:04,325 INFO L225 Difference]: With dead ends: 64 [2020-09-21 10:31:04,325 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 10:31:04,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:31:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 10:31:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-21 10:31:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 10:31:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-21 10:31:04,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2020-09-21 10:31:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:04,345 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-21 10:31:04,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:31:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-21 10:31:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:31:04,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:04,349 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:04,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:31:04,349 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:04,350 INFO L82 PathProgramCache]: Analyzing trace with hash -240090480, now seen corresponding path program 6 times [2020-09-21 10:31:04,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:04,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197132838] [2020-09-21 10:31:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:04,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:04,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197132838] [2020-09-21 10:31:04,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:04,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:31:04,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786020774] [2020-09-21 10:31:04,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:31:04,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:31:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:31:04,666 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-09-21 10:31:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:19,198 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-09-21 10:31:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:31:19,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-21 10:31:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:19,200 INFO L225 Difference]: With dead ends: 70 [2020-09-21 10:31:19,201 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 10:31:19,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:31:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 10:31:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-21 10:31:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 10:31:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-09-21 10:31:19,217 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2020-09-21 10:31:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:19,218 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-09-21 10:31:19,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:31:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-09-21 10:31:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 10:31:19,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:19,223 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:19,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:31:19,223 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2010200744, now seen corresponding path program 7 times [2020-09-21 10:31:19,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:19,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74203219] [2020-09-21 10:31:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:19,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:19,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74203219] [2020-09-21 10:31:19,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:19,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:31:19,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799384424] [2020-09-21 10:31:19,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:31:19,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:31:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:31:19,597 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states.