/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=DEEPEST -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 [2020-08-18 21:07:37,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:37,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:37,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 21:07:37,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:37,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:37,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:37,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:37,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:37,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:37,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:37,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:37,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:37,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:37,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:37,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:37,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:07:37,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:37,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:37,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:37,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:07:37,948 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:37,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:37,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:37,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:37,950 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:37,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:37,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:37,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:37,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:37,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:37,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:37,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:37,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:37,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:37,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:37,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:37,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:37,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:37,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:37,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:37,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:37,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:37,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:37,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:37,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:37,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:37,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:37,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:37,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:37,955 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:38,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:38,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:38,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:38,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:38,288 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:38,288 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 21:07:38,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3b010fa0/d5c57752a57c4701a0dea1907f47d6cc/FLAG7f4f6c0e0 [2020-08-18 21:07:38,875 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:38,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 21:07:38,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3b010fa0/d5c57752a57c4701a0dea1907f47d6cc/FLAG7f4f6c0e0 [2020-08-18 21:07:39,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3b010fa0/d5c57752a57c4701a0dea1907f47d6cc [2020-08-18 21:07:39,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:39,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:39,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:39,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:39,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:39,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1aada5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39, skipping insertion in model container [2020-08-18 21:07:39,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:39,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:39,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:39,502 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:39,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:39,629 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:39,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39 WrapperNode [2020-08-18 21:07:39,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:39,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:39,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:39,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:39,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... [2020-08-18 21:07:39,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:39,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:39,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:39,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:39,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:39,724 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-18 21:07:39,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:39,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:39,726 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 21:07:39,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:07:39,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:39,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:07:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:07:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:07:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:39,988 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:39,988 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 21:07:39,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:39 BoogieIcfgContainer [2020-08-18 21:07:39,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:39,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:39,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:39,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:39,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:39" (1/3) ... [2020-08-18 21:07:39,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c27e25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:39, skipping insertion in model container [2020-08-18 21:07:39,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:39" (2/3) ... [2020-08-18 21:07:39,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c27e25d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:39, skipping insertion in model container [2020-08-18 21:07:39,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:39" (3/3) ... [2020-08-18 21:07:40,001 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-18 21:07:40,012 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:40,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:40,037 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:40,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:40,062 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:40,062 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:40,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:40,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:40,063 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:40,063 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:40,063 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-18 21:07:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:07:40,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:40,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:40,102 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-18 21:07:40,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:40,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861530813] [2020-08-18 21:07:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 21:07:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:40,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861530813] [2020-08-18 21:07:40,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:40,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:40,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375764278] [2020-08-18 21:07:40,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:40,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:40,328 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-18 21:07:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:40,428 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-18 21:07:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:40,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:07:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:40,441 INFO L225 Difference]: With dead ends: 42 [2020-08-18 21:07:40,442 INFO L226 Difference]: Without dead ends: 20 [2020-08-18 21:07:40,446 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 [2020-08-18 21:07:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-18 21:07:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-18 21:07:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 21:07:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 21:07:40,484 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-18 21:07:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:40,484 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 21:07:40,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 21:07:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:07:40,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:40,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:40,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:40,487 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-18 21:07:40,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:40,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373572817] [2020-08-18 21:07:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 21:07:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:40,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373572817] [2020-08-18 21:07:40,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:40,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:40,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669365427] [2020-08-18 21:07:40,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:40,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:40,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:40,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:40,580 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-18 21:07:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:40,647 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-18 21:07:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:40,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 21:07:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:40,649 INFO L225 Difference]: With dead ends: 34 [2020-08-18 21:07:40,649 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 21:07:40,650 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 [2020-08-18 21:07:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 21:07:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 21:07:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 21:07:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 21:07:40,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-18 21:07:40,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:40,658 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 21:07:40,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 21:07:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:07:40,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:40,660 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] [2020-08-18 21:07:40,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:40,660 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-18 21:07:40,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:40,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650588461] [2020-08-18 21:07:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 21:07:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:40,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650588461] [2020-08-18 21:07:40,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:40,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:07:40,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928690208] [2020-08-18 21:07:40,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:40,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:40,736 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-18 21:07:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:40,805 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-18 21:07:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:40,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 21:07:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:40,807 INFO L225 Difference]: With dead ends: 36 [2020-08-18 21:07:40,807 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 21:07:40,808 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 [2020-08-18 21:07:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 21:07:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 21:07:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 21:07:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-18 21:07:40,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-18 21:07:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:40,815 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-18 21:07:40,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-18 21:07:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:40,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:40,816 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] [2020-08-18 21:07:40,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:40,817 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-18 21:07:40,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:40,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089302042] [2020-08-18 21:07:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:07:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:40,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089302042] [2020-08-18 21:07:40,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:40,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:07:40,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691097305] [2020-08-18 21:07:40,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:40,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:40,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:40,960 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-18 21:07:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:41,045 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-18 21:07:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:07:41,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 21:07:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:41,047 INFO L225 Difference]: With dead ends: 38 [2020-08-18 21:07:41,048 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 21:07:41,048 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 [2020-08-18 21:07:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 21:07:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-18 21:07:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 21:07:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-18 21:07:41,055 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-18 21:07:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:41,056 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-18 21:07:41,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:07:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-18 21:07:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:41,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:41,058 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] [2020-08-18 21:07:41,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:41,058 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:41,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-18 21:07:41,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:41,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652479919] [2020-08-18 21:07:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 21:07:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:41,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652479919] [2020-08-18 21:07:41,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:41,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:07:41,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48918382] [2020-08-18 21:07:41,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:07:41,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:41,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:07:41,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:07:41,217 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-18 21:07:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:41,279 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-18 21:07:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:07:41,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 21:07:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:41,281 INFO L225 Difference]: With dead ends: 40 [2020-08-18 21:07:41,281 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 21:07:41,282 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 [2020-08-18 21:07:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 21:07:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 21:07:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 21:07:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 21:07:41,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-18 21:07:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:41,288 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 21:07:41,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:07:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 21:07:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:41,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:41,290 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] [2020-08-18 21:07:41,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:41,290 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-18 21:07:41,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:41,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048759873] [2020-08-18 21:07:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:07:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:41,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048759873] [2020-08-18 21:07:41,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:41,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:07:41,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211252701] [2020-08-18 21:07:41,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:07:41,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:07:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:07:41,430 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-18 21:07:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:41,502 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-18 21:07:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:07:41,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-18 21:07:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:41,505 INFO L225 Difference]: With dead ends: 42 [2020-08-18 21:07:41,505 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 21:07:41,506 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 [2020-08-18 21:07:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 21:07:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 21:07:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 21:07:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-18 21:07:41,517 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-18 21:07:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:41,518 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-18 21:07:41,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:07:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-18 21:07:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:07:41,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:41,520 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] [2020-08-18 21:07:41,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:41,520 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:41,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-18 21:07:41,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:41,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926477822] [2020-08-18 21:07:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 21:07:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:41,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926477822] [2020-08-18 21:07:41,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:41,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:07:41,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980912675] [2020-08-18 21:07:41,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:07:41,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:41,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:07:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:07:41,679 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-18 21:07:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:41,768 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-18 21:07:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:07:41,768 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 21:07:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:41,769 INFO L225 Difference]: With dead ends: 44 [2020-08-18 21:07:41,769 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 21:07:41,770 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 [2020-08-18 21:07:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 21:07:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-18 21:07:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 21:07:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-18 21:07:41,776 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-18 21:07:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:41,776 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-18 21:07:41,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:07:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-18 21:07:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 21:07:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:41,778 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] [2020-08-18 21:07:41,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:07:41,778 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-18 21:07:41,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:41,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323135552] [2020-08-18 21:07:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 21:07:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:41,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323135552] [2020-08-18 21:07:41,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:41,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:07:41,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603537325] [2020-08-18 21:07:41,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:07:41,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:41,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:07:41,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:07:41,910 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-18 21:07:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:41,993 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-18 21:07:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:07:41,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-18 21:07:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:41,994 INFO L225 Difference]: With dead ends: 46 [2020-08-18 21:07:41,994 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 21:07:41,996 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 [2020-08-18 21:07:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 21:07:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 21:07:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 21:07:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 21:07:42,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-18 21:07:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:42,008 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 21:07:42,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:07:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 21:07:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 21:07:42,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:42,012 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] [2020-08-18 21:07:42,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:07:42,012 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-18 21:07:42,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:42,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317813580] [2020-08-18 21:07:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 21:07:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317813580] [2020-08-18 21:07:42,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:42,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:07:42,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74474017] [2020-08-18 21:07:42,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:07:42,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:07:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:07:42,126 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 21:07:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:42,209 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-18 21:07:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:07:42,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-18 21:07:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:42,211 INFO L225 Difference]: With dead ends: 48 [2020-08-18 21:07:42,211 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 21:07:42,212 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 [2020-08-18 21:07:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 21:07:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-18 21:07:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 21:07:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-18 21:07:42,218 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-18 21:07:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:42,218 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-18 21:07:42,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:07:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-18 21:07:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 21:07:42,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:42,220 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] [2020-08-18 21:07:42,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:07:42,221 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-18 21:07:42,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:42,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207317937] [2020-08-18 21:07:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 21:07:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:42,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207317937] [2020-08-18 21:07:42,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:42,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:07:42,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441514390] [2020-08-18 21:07:42,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:07:42,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:07:42,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:07:42,381 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-18 21:07:42,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:42,476 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-18 21:07:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:07:42,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-18 21:07:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:42,478 INFO L225 Difference]: With dead ends: 50 [2020-08-18 21:07:42,478 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 21:07:42,479 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 [2020-08-18 21:07:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 21:07:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-18 21:07:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 21:07:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-18 21:07:42,487 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-18 21:07:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:42,489 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-18 21:07:42,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:07:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-18 21:07:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 21:07:42,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:42,493 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] [2020-08-18 21:07:42,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:07:42,494 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-18 21:07:42,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:42,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765846551] [2020-08-18 21:07:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 21:07:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:42,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765846551] [2020-08-18 21:07:42,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:42,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:07:42,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257721062] [2020-08-18 21:07:42,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:07:42,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:07:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:07:42,665 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-18 21:07:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:42,756 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-18 21:07:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:07:42,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-18 21:07:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:42,758 INFO L225 Difference]: With dead ends: 52 [2020-08-18 21:07:42,758 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 21:07:42,759 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 [2020-08-18 21:07:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 21:07:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 21:07:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 21:07:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 21:07:42,770 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-18 21:07:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:42,771 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 21:07:42,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:07:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 21:07:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 21:07:42,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:42,773 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] [2020-08-18 21:07:42,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:07:42,773 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-18 21:07:42,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:42,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428948498] [2020-08-18 21:07:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:07:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:42,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428948498] [2020-08-18 21:07:42,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:42,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:07:42,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780958215] [2020-08-18 21:07:42,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:07:42,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:07:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:07:42,956 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-18 21:07:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:43,069 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-18 21:07:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:07:43,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-18 21:07:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:43,070 INFO L225 Difference]: With dead ends: 54 [2020-08-18 21:07:43,071 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 21:07:43,071 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 [2020-08-18 21:07:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 21:07:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 21:07:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 21:07:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-18 21:07:43,077 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-18 21:07:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:43,077 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-18 21:07:43,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:07:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-18 21:07:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 21:07:43,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:43,078 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] [2020-08-18 21:07:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:07:43,079 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-18 21:07:43,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:43,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080689513] [2020-08-18 21:07:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:07:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:43,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080689513] [2020-08-18 21:07:43,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:43,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 21:07:43,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948344830] [2020-08-18 21:07:43,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 21:07:43,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 21:07:43,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:07:43,253 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-18 21:07:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:43,345 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-18 21:07:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:07:43,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-18 21:07:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:43,347 INFO L225 Difference]: With dead ends: 56 [2020-08-18 21:07:43,347 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 21:07:43,348 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 [2020-08-18 21:07:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 21:07:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-18 21:07:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 21:07:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-18 21:07:43,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-18 21:07:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:43,355 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-18 21:07:43,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 21:07:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-18 21:07:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 21:07:43,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:43,356 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] [2020-08-18 21:07:43,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:07:43,356 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-18 21:07:43,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:43,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640903238] [2020-08-18 21:07:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 21:07:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:43,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640903238] [2020-08-18 21:07:43,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:43,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 21:07:43,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630694184] [2020-08-18 21:07:43,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 21:07:43,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:43,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 21:07:43,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 21:07:43,536 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-18 21:07:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:43,616 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-18 21:07:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:07:43,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-18 21:07:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:43,617 INFO L225 Difference]: With dead ends: 58 [2020-08-18 21:07:43,617 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 21:07:43,618 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 [2020-08-18 21:07:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 21:07:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-18 21:07:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 21:07:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 21:07:43,623 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-18 21:07:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:43,623 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 21:07:43,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 21:07:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 21:07:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 21:07:43,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:43,624 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] [2020-08-18 21:07:43,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:07:43,625 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-18 21:07:43,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:43,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232084766] [2020-08-18 21:07:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:07:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:43,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232084766] [2020-08-18 21:07:43,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:43,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 21:07:43,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119401489] [2020-08-18 21:07:43,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 21:07:43,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 21:07:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:07:43,808 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-18 21:07:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:43,917 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-18 21:07:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 21:07:43,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-18 21:07:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:43,920 INFO L225 Difference]: With dead ends: 60 [2020-08-18 21:07:43,920 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 21:07:43,921 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 [2020-08-18 21:07:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 21:07:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-18 21:07:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 21:07:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-18 21:07:43,933 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-18 21:07:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:43,933 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-18 21:07:43,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 21:07:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-18 21:07:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 21:07:43,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:43,950 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] [2020-08-18 21:07:43,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:07:43,951 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-18 21:07:43,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:43,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80155844] [2020-08-18 21:07:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:07:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:44,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80155844] [2020-08-18 21:07:44,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:44,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 21:07:44,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67773142] [2020-08-18 21:07:44,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 21:07:44,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 21:07:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:07:44,151 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-18 21:07:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:44,245 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-18 21:07:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 21:07:44,245 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-18 21:07:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:44,246 INFO L225 Difference]: With dead ends: 62 [2020-08-18 21:07:44,246 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 21:07:44,247 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 [2020-08-18 21:07:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 21:07:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-18 21:07:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 21:07:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-18 21:07:44,255 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-18 21:07:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:44,256 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-18 21:07:44,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 21:07:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-18 21:07:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 21:07:44,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:44,257 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] [2020-08-18 21:07:44,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:07:44,257 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-18 21:07:44,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:44,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435461783] [2020-08-18 21:07:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 21:07:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:44,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435461783] [2020-08-18 21:07:44,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:44,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 21:07:44,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370985003] [2020-08-18 21:07:44,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 21:07:44,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 21:07:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:07:44,504 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-18 21:07:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:44,594 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-18 21:07:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:07:44,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-18 21:07:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:44,595 INFO L225 Difference]: With dead ends: 64 [2020-08-18 21:07:44,595 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 21:07:44,596 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 [2020-08-18 21:07:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 21:07:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-18 21:07:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 21:07:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 21:07:44,601 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-18 21:07:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:44,602 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 21:07:44,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 21:07:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 21:07:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 21:07:44,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:44,603 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] [2020-08-18 21:07:44,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:07:44,603 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-18 21:07:44,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:44,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710526606] [2020-08-18 21:07:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:07:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:44,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710526606] [2020-08-18 21:07:44,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:44,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 21:07:44,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935433182] [2020-08-18 21:07:44,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 21:07:44,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:44,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 21:07:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 21:07:44,884 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-18 21:07:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:44,980 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-18 21:07:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 21:07:44,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-18 21:07:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:44,981 INFO L225 Difference]: With dead ends: 66 [2020-08-18 21:07:44,981 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 21:07:44,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 21:07:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 21:07:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-18 21:07:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-18 21:07:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-18 21:07:44,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-18 21:07:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:44,987 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-18 21:07:44,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 21:07:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-18 21:07:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 21:07:44,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:44,988 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] [2020-08-18 21:07:44,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:07:44,988 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-18 21:07:44,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:44,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247699104] [2020-08-18 21:07:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:45,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 21:07:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:45,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247699104] [2020-08-18 21:07:45,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:45,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 21:07:45,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066024878] [2020-08-18 21:07:45,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 21:07:45,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 21:07:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:07:45,245 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-18 21:07:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:45,375 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-18 21:07:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 21:07:45,376 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-18 21:07:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:45,377 INFO L225 Difference]: With dead ends: 68 [2020-08-18 21:07:45,378 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 21:07:45,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:07:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 21:07:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 21:07:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 21:07:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-18 21:07:45,384 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-18 21:07:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:45,384 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-18 21:07:45,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 21:07:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-18 21:07:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 21:07:45,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:45,385 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] [2020-08-18 21:07:45,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:07:45,386 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-18 21:07:45,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:45,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153795416] [2020-08-18 21:07:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:45,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:45,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:07:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:45,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153795416] [2020-08-18 21:07:45,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:45,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 21:07:45,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963630776] [2020-08-18 21:07:45,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 21:07:45,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:45,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 21:07:45,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:07:45,669 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-18 21:07:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:45,764 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-18 21:07:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:07:45,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-18 21:07:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:45,766 INFO L225 Difference]: With dead ends: 70 [2020-08-18 21:07:45,766 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 21:07:45,766 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 [2020-08-18 21:07:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 21:07:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-18 21:07:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 21:07:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 21:07:45,772 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-18 21:07:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:45,774 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 21:07:45,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 21:07:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 21:07:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 21:07:45,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:45,775 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] [2020-08-18 21:07:45,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:07:45,775 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-18 21:07:45,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:45,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038052284] [2020-08-18 21:07:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:46,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:46,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:07:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:46,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038052284] [2020-08-18 21:07:46,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:46,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 21:07:46,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359948238] [2020-08-18 21:07:46,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 21:07:46,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:46,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 21:07:46,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:07:46,082 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-18 21:07:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:46,217 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-18 21:07:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 21:07:46,217 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-18 21:07:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:46,218 INFO L225 Difference]: With dead ends: 71 [2020-08-18 21:07:46,218 INFO L226 Difference]: Without dead ends: 59 [2020-08-18 21:07:46,219 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 [2020-08-18 21:07:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-18 21:07:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-18 21:07:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 21:07:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-18 21:07:46,223 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-18 21:07:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:46,224 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-18 21:07:46,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 21:07:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-18 21:07:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 21:07:46,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:46,224 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] [2020-08-18 21:07:46,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:07:46,225 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-18 21:07:46,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:46,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402349649] [2020-08-18 21:07:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:07:46,322 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:07:46,323 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:07:46,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:07:46,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:46 BoogieIcfgContainer [2020-08-18 21:07:46,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:46,357 INFO L168 Benchmark]: Toolchain (without parser) took 7069.83 ms. Allocated memory was 140.5 MB in the beginning and 305.1 MB in the end (delta: 164.6 MB). Free memory was 103.8 MB in the beginning and 171.9 MB in the end (delta: -68.1 MB). Peak memory consumption was 96.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:46,358 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:07:46,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.17 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.4 MB in the beginning and 182.4 MB in the end (delta: -79.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:46,359 INFO L168 Benchmark]: Boogie Preprocessor took 38.90 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:46,360 INFO L168 Benchmark]: RCFGBuilder took 322.86 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 164.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:46,361 INFO L168 Benchmark]: TraceAbstraction took 6361.00 ms. Allocated memory was 203.4 MB in the beginning and 305.1 MB in the end (delta: 101.7 MB). Free memory was 164.1 MB in the beginning and 171.9 MB in the end (delta: -7.8 MB). Peak memory consumption was 93.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:46,364 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.17 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 103.4 MB in the beginning and 182.4 MB in the end (delta: -79.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.90 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 322.86 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 164.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6361.00 ms. Allocated memory was 203.4 MB in the beginning and 305.1 MB in the end (delta: 101.7 MB). Free memory was 164.1 MB in the beginning and 171.9 MB in the end (delta: -7.8 MB). Peak memory consumption was 93.9 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: 6.2s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.0s, 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, 2.3s 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, 3.1s 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...