/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:58:45,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:58:45,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:58:45,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:58:45,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:58:45,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:58:45,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:58:45,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:58:45,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:58:45,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:58:45,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:58:45,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:58:45,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:58:45,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:58:45,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:58:45,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:58:45,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:58:45,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:58:45,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:58:45,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:58:45,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:58:45,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:58:45,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:58:45,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:58:45,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:58:45,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:58:45,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:58:45,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:58:45,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:58:45,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:58:45,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:58:45,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:58:45,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:58:45,634 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:58:45,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:58:45,635 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:58:45,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:58:45,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:58:45,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:58:45,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:58:45,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:58:45,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:58:45,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:58:45,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:58:45,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:58:45,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:58:45,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:58:45,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:58:45,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:58:45,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:58:45,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:58:45,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:58:45,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:58:45,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:58:45,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:58:45,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:58:45,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:58:45,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:58:45,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:58:45,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:58:45,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:58:45,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:58:45,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:58:45,977 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:58:45,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-19 01:58:46,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/333fa9e33/78f6faf81f4241acaa2e1930a970a0fc/FLAGad35cb9f9 [2020-08-19 01:58:46,495 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:58:46,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-19 01:58:46,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/333fa9e33/78f6faf81f4241acaa2e1930a970a0fc/FLAGad35cb9f9 [2020-08-19 01:58:46,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/333fa9e33/78f6faf81f4241acaa2e1930a970a0fc [2020-08-19 01:58:46,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:58:46,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:58:46,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:46,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:58:46,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:58:46,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:46" (1/1) ... [2020-08-19 01:58:46,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122a18af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:46, skipping insertion in model container [2020-08-19 01:58:46,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:46" (1/1) ... [2020-08-19 01:58:46,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:58:46,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:58:47,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:47,163 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:58:47,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:47,194 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:58:47,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47 WrapperNode [2020-08-19 01:58:47,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:47,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:58:47,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:58:47,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:58:47,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... [2020-08-19 01:58:47,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:58:47,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:58:47,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:58:47,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:58:47,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:58:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:58:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:58:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-19 01:58:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:58:47,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:58:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:58:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 01:58:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 01:58:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:58:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 01:58:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 01:58:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:58:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:58:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:58:47,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:58:47,688 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 01:58:47,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:47 BoogieIcfgContainer [2020-08-19 01:58:47,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:58:47,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:58:47,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:58:47,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:58:47,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:58:46" (1/3) ... [2020-08-19 01:58:47,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186857be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:47, skipping insertion in model container [2020-08-19 01:58:47,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:47" (2/3) ... [2020-08-19 01:58:47,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186857be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:47, skipping insertion in model container [2020-08-19 01:58:47,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:47" (3/3) ... [2020-08-19 01:58:47,700 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-19 01:58:47,711 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:58:47,718 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:58:47,732 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:58:47,755 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:58:47,755 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:58:47,755 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:58:47,755 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:58:47,755 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:58:47,756 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:58:47,756 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:58:47,756 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:58:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-19 01:58:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 01:58:47,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:47,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:47,779 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-19 01:58:47,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:47,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418279632] [2020-08-19 01:58:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:47,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 01:58:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:48,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418279632] [2020-08-19 01:58:48,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:48,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:48,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696505985] [2020-08-19 01:58:48,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:48,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:48,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:48,039 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-19 01:58:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:48,132 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-19 01:58:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:48,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 01:58:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:48,145 INFO L225 Difference]: With dead ends: 42 [2020-08-19 01:58:48,145 INFO L226 Difference]: Without dead ends: 20 [2020-08-19 01:58:48,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-19 01:58:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-19 01:58:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-19 01:58:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-19 01:58:48,183 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-19 01:58:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:48,184 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-19 01:58:48,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-19 01:58:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:58:48,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:48,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:48,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:58:48,186 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-19 01:58:48,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:48,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953811285] [2020-08-19 01:58:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 01:58:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:48,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953811285] [2020-08-19 01:58:48,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:48,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:58:48,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363357917] [2020-08-19 01:58:48,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:58:48,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:48,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:58:48,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:58:48,299 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-19 01:58:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:48,396 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-19 01:58:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:58:48,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-19 01:58:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:48,398 INFO L225 Difference]: With dead ends: 34 [2020-08-19 01:58:48,399 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 01:58:48,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:58:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 01:58:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-19 01:58:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 01:58:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 01:58:48,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-19 01:58:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:48,416 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 01:58:48,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:58:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 01:58:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:58:48,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:48,418 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] [2020-08-19 01:58:48,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:58:48,419 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-19 01:58:48,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:48,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681177074] [2020-08-19 01:58:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-19 01:58:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:48,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681177074] [2020-08-19 01:58:48,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:48,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 01:58:48,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774843984] [2020-08-19 01:58:48,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:58:48,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:58:48,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:58:48,523 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-19 01:58:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:48,596 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-19 01:58:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:58:48,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 01:58:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:48,598 INFO L225 Difference]: With dead ends: 36 [2020-08-19 01:58:48,598 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 01:58:48,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:58:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 01:58:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-19 01:58:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-19 01:58:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-19 01:58:48,605 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-19 01:58:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:48,605 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-19 01:58:48,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:58:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-19 01:58:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:48,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:48,607 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:48,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:58:48,607 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-19 01:58:48,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:48,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378703519] [2020-08-19 01:58:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 01:58:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:48,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378703519] [2020-08-19 01:58:48,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:48,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 01:58:48,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394049178] [2020-08-19 01:58:48,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:58:48,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:58:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:58:48,734 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-19 01:58:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:48,809 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-19 01:58:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:58:48,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-19 01:58:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:48,810 INFO L225 Difference]: With dead ends: 38 [2020-08-19 01:58:48,811 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 01:58:48,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:58:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 01:58:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-19 01:58:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-19 01:58:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-19 01:58:48,818 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-19 01:58:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:48,819 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-19 01:58:48,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:58:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-19 01:58:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:58:48,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:48,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:48,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:58:48,821 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-19 01:58:48,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:48,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130219384] [2020-08-19 01:58:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 01:58:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:48,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130219384] [2020-08-19 01:58:48,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:48,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:58:48,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158677723] [2020-08-19 01:58:48,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:58:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:58:48,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:58:48,948 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-19 01:58:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:49,009 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-19 01:58:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:58:49,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-19 01:58:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:49,011 INFO L225 Difference]: With dead ends: 40 [2020-08-19 01:58:49,011 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 01:58:49,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:58:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 01:58:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-19 01:58:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 01:58:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 01:58:49,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-19 01:58:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:49,018 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 01:58:49,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:58:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 01:58:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:58:49,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:49,020 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:49,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:58:49,020 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:49,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-19 01:58:49,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:49,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207258647] [2020-08-19 01:58:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:58:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:49,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207258647] [2020-08-19 01:58:49,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:49,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:58:49,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208212385] [2020-08-19 01:58:49,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:58:49,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:58:49,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:58:49,112 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-19 01:58:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:49,175 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-19 01:58:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:58:49,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-19 01:58:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:49,176 INFO L225 Difference]: With dead ends: 42 [2020-08-19 01:58:49,176 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 01:58:49,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:58:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 01:58:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-19 01:58:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 01:58:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-19 01:58:49,183 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-19 01:58:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:49,183 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-19 01:58:49,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:58:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-19 01:58:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:58:49,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:49,185 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:49,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:58:49,185 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-19 01:58:49,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:49,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991880820] [2020-08-19 01:58:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 01:58:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:49,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991880820] [2020-08-19 01:58:49,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:49,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:58:49,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836404620] [2020-08-19 01:58:49,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:58:49,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:49,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:58:49,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:58:49,284 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-19 01:58:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:49,367 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-19 01:58:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:58:49,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-19 01:58:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:49,369 INFO L225 Difference]: With dead ends: 44 [2020-08-19 01:58:49,369 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 01:58:49,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:58:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 01:58:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-19 01:58:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 01:58:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-19 01:58:49,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-19 01:58:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:49,376 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-19 01:58:49,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:58:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-19 01:58:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 01:58:49,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:49,378 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:49,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:58:49,378 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-19 01:58:49,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:49,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395334678] [2020-08-19 01:58:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 01:58:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:49,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395334678] [2020-08-19 01:58:49,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:49,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:58:49,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014832809] [2020-08-19 01:58:49,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:58:49,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:58:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:58:49,478 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-19 01:58:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:49,545 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-19 01:58:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 01:58:49,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-19 01:58:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:49,547 INFO L225 Difference]: With dead ends: 46 [2020-08-19 01:58:49,547 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 01:58:49,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:58:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 01:58:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-19 01:58:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 01:58:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 01:58:49,553 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-19 01:58:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:49,554 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 01:58:49,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:58:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 01:58:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 01:58:49,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:49,555 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:49,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:58:49,555 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-19 01:58:49,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:49,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204968616] [2020-08-19 01:58:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 01:58:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:49,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204968616] [2020-08-19 01:58:49,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:49,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 01:58:49,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839473450] [2020-08-19 01:58:49,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 01:58:49,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 01:58:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:58:49,689 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 01:58:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:49,787 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-19 01:58:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:58:49,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-19 01:58:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:49,788 INFO L225 Difference]: With dead ends: 48 [2020-08-19 01:58:49,789 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 01:58:49,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:58:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 01:58:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-19 01:58:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-19 01:58:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-19 01:58:49,795 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-19 01:58:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:49,796 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-19 01:58:49,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 01:58:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-19 01:58:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:58:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:49,797 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:49,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:58:49,798 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:49,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-19 01:58:49,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:49,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248173425] [2020-08-19 01:58:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 01:58:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:49,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248173425] [2020-08-19 01:58:49,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:49,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 01:58:49,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650453116] [2020-08-19 01:58:49,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:58:49,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:58:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:58:49,950 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-19 01:58:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:50,040 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-19 01:58:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 01:58:50,041 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-19 01:58:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:50,042 INFO L225 Difference]: With dead ends: 50 [2020-08-19 01:58:50,042 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 01:58:50,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:58:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 01:58:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-19 01:58:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 01:58:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-19 01:58:50,048 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-19 01:58:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:50,048 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-19 01:58:50,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 01:58:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-19 01:58:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 01:58:50,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:50,049 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:50,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:58:50,050 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-19 01:58:50,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:50,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163710321] [2020-08-19 01:58:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 01:58:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:50,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163710321] [2020-08-19 01:58:50,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:50,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 01:58:50,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392848686] [2020-08-19 01:58:50,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 01:58:50,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 01:58:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:58:50,171 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-19 01:58:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:50,248 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-19 01:58:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 01:58:50,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-19 01:58:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:50,249 INFO L225 Difference]: With dead ends: 52 [2020-08-19 01:58:50,249 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 01:58:50,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:58:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 01:58:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-19 01:58:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 01:58:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 01:58:50,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-19 01:58:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:50,256 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 01:58:50,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 01:58:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 01:58:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 01:58:50,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:50,257 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:50,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:58:50,257 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-19 01:58:50,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:50,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562084599] [2020-08-19 01:58:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 01:58:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:50,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562084599] [2020-08-19 01:58:50,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:50,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:58:50,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613768228] [2020-08-19 01:58:50,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:58:50,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:58:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:58:50,435 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-19 01:58:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:50,537 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-19 01:58:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 01:58:50,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-19 01:58:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:50,538 INFO L225 Difference]: With dead ends: 54 [2020-08-19 01:58:50,538 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 01:58:50,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:58:50,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 01:58:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-19 01:58:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-19 01:58:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-19 01:58:50,544 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-19 01:58:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:50,544 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-19 01:58:50,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:58:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-19 01:58:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 01:58:50,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:50,546 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:50,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:58:50,546 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-19 01:58:50,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:50,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509163112] [2020-08-19 01:58:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 01:58:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:50,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509163112] [2020-08-19 01:58:50,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:50,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 01:58:50,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998899868] [2020-08-19 01:58:50,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 01:58:50,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 01:58:50,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-19 01:58:50,720 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-19 01:58:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:50,815 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-19 01:58:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 01:58:50,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-19 01:58:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:50,816 INFO L225 Difference]: With dead ends: 56 [2020-08-19 01:58:50,817 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 01:58:50,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-19 01:58:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 01:58:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-19 01:58:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 01:58:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-19 01:58:50,831 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-19 01:58:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:50,831 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-19 01:58:50,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 01:58:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-19 01:58:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 01:58:50,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:50,835 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:50,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:58:50,836 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-19 01:58:50,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:50,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481881825] [2020-08-19 01:58:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 01:58:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:51,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481881825] [2020-08-19 01:58:51,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:51,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 01:58:51,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404205516] [2020-08-19 01:58:51,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 01:58:51,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 01:58:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-19 01:58:51,027 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-19 01:58:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:51,110 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-19 01:58:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 01:58:51,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-19 01:58:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:51,111 INFO L225 Difference]: With dead ends: 58 [2020-08-19 01:58:51,111 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 01:58:51,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-19 01:58:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 01:58:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-19 01:58:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 01:58:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 01:58:51,120 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-19 01:58:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:51,122 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 01:58:51,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 01:58:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 01:58:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 01:58:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:51,123 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:51,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:58:51,124 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-19 01:58:51,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:51,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530470000] [2020-08-19 01:58:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 01:58:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:51,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530470000] [2020-08-19 01:58:51,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:51,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 01:58:51,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778748181] [2020-08-19 01:58:51,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 01:58:51,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 01:58:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:58:51,346 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-19 01:58:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:51,450 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-19 01:58:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 01:58:51,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-19 01:58:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:51,451 INFO L225 Difference]: With dead ends: 60 [2020-08-19 01:58:51,451 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 01:58:51,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:58:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 01:58:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-19 01:58:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-19 01:58:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-19 01:58:51,456 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-19 01:58:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:51,457 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-19 01:58:51,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 01:58:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-19 01:58:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 01:58:51,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:51,458 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:51,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:58:51,458 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-19 01:58:51,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:51,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769104632] [2020-08-19 01:58:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 01:58:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:51,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769104632] [2020-08-19 01:58:51,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:51,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 01:58:51,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028722888] [2020-08-19 01:58:51,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 01:58:51,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 01:58:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-19 01:58:51,709 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-19 01:58:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:51,819 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-19 01:58:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 01:58:51,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-19 01:58:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:51,821 INFO L225 Difference]: With dead ends: 62 [2020-08-19 01:58:51,821 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 01:58:51,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-19 01:58:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 01:58:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-19 01:58:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 01:58:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-19 01:58:51,833 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-19 01:58:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:51,834 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-19 01:58:51,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 01:58:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-19 01:58:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 01:58:51,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:51,836 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:51,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 01:58:51,836 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-19 01:58:51,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:51,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484301008] [2020-08-19 01:58:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 01:58:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:52,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484301008] [2020-08-19 01:58:52,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:52,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 01:58:52,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79708965] [2020-08-19 01:58:52,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 01:58:52,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 01:58:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-19 01:58:52,055 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-19 01:58:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:52,131 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-19 01:58:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 01:58:52,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-19 01:58:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:52,132 INFO L225 Difference]: With dead ends: 64 [2020-08-19 01:58:52,132 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 01:58:52,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-19 01:58:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 01:58:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-19 01:58:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 01:58:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 01:58:52,139 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-19 01:58:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:52,139 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 01:58:52,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 01:58:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 01:58:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 01:58:52,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:52,141 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:52,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 01:58:52,142 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-19 01:58:52,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:52,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613340800] [2020-08-19 01:58:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 01:58:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:52,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613340800] [2020-08-19 01:58:52,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:52,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 01:58:52,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441177108] [2020-08-19 01:58:52,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 01:58:52,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 01:58:52,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:58:52,406 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-19 01:58:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:52,521 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-19 01:58:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 01:58:52,522 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-19 01:58:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:52,522 INFO L225 Difference]: With dead ends: 66 [2020-08-19 01:58:52,523 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 01:58:52,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:58:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 01:58:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-19 01:58:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-19 01:58:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-19 01:58:52,532 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-19 01:58:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:52,532 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-19 01:58:52,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 01:58:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-19 01:58:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 01:58:52,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:52,536 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:52,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 01:58:52,537 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-19 01:58:52,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:52,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213621671] [2020-08-19 01:58:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 01:58:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:52,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213621671] [2020-08-19 01:58:52,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:52,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 01:58:52,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150453650] [2020-08-19 01:58:52,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 01:58:52,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 01:58:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-19 01:58:52,782 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-19 01:58:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:52,904 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-19 01:58:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 01:58:52,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-19 01:58:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:52,905 INFO L225 Difference]: With dead ends: 68 [2020-08-19 01:58:52,905 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 01:58:52,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-19 01:58:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 01:58:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-19 01:58:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 01:58:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-19 01:58:52,910 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-19 01:58:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:52,910 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-19 01:58:52,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 01:58:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-19 01:58:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 01:58:52,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:52,911 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:52,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 01:58:52,911 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-19 01:58:52,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:52,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630801023] [2020-08-19 01:58:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:53,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:53,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 01:58:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:53,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630801023] [2020-08-19 01:58:53,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:53,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 01:58:53,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856888894] [2020-08-19 01:58:53,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 01:58:53,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 01:58:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-19 01:58:53,177 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-19 01:58:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:53,270 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-19 01:58:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 01:58:53,271 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-19 01:58:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:53,271 INFO L225 Difference]: With dead ends: 70 [2020-08-19 01:58:53,272 INFO L226 Difference]: Without dead ends: 58 [2020-08-19 01:58:53,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-19 01:58:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-19 01:58:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-19 01:58:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 01:58:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 01:58:53,275 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-19 01:58:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:53,276 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 01:58:53,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 01:58:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 01:58:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 01:58:53,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:53,277 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:53,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 01:58:53,277 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-19 01:58:53,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:53,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058933648] [2020-08-19 01:58:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:53,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 01:58:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:53,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058933648] [2020-08-19 01:58:53,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:53,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 01:58:53,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925791030] [2020-08-19 01:58:53,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 01:58:53,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 01:58:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-19 01:58:53,576 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-19 01:58:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:53,706 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-19 01:58:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 01:58:53,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-19 01:58:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:53,708 INFO L225 Difference]: With dead ends: 71 [2020-08-19 01:58:53,708 INFO L226 Difference]: Without dead ends: 59 [2020-08-19 01:58:53,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-19 01:58:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-19 01:58:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-19 01:58:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 01:58:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-19 01:58:53,713 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-19 01:58:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:53,713 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-19 01:58:53,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 01:58:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-19 01:58:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 01:58:53,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:53,714 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:53,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 01:58:53,714 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-19 01:58:53,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:53,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567796680] [2020-08-19 01:58:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:58:53,808 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:58:53,808 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:58:53,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 01:58:53,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:58:53 BoogieIcfgContainer [2020-08-19 01:58:53,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:58:53,840 INFO L168 Benchmark]: Toolchain (without parser) took 6941.42 ms. Allocated memory was 140.0 MB in the beginning and 309.3 MB in the end (delta: 169.3 MB). Free memory was 102.8 MB in the beginning and 183.4 MB in the end (delta: -80.6 MB). Peak memory consumption was 88.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:53,841 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 01:58:53,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.13 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:53,842 INFO L168 Benchmark]: Boogie Preprocessor took 132.79 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 179.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:53,843 INFO L168 Benchmark]: RCFGBuilder took 362.72 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 163.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:53,843 INFO L168 Benchmark]: TraceAbstraction took 6144.04 ms. Allocated memory was 201.9 MB in the beginning and 309.3 MB in the end (delta: 107.5 MB). Free memory was 162.8 MB in the beginning and 183.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:53,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.13 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.79 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 179.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.72 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 163.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6144.04 ms. Allocated memory was 201.9 MB in the beginning and 309.3 MB in the end (delta: 107.5 MB). Free memory was 162.8 MB in the beginning and 183.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred 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: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 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 incorrect! Received shutdown request...