/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:07:28,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:07:28,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:07:28,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:07:28,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:07:28,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:07:28,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:07:28,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:07:28,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:07:28,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:07:28,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:07:28,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:07:28,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:07:28,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:07:28,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:07:28,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:07:28,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:07:28,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:07:28,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:07:28,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:07:28,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:07:28,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:07:28,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:07:28,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:07:28,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:07:28,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:07:28,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:07:28,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:07:28,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:07:28,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:07:28,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:07:28,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:07:28,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:07:28,530 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:07:28,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:07:28,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:07:28,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:07:28,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:07:28,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:07:28,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:07:28,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:07:28,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:07:28,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:07:28,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:07:28,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:07:28,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:07:28,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:07:28,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:07:28,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:07:28,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:07:28,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:07:28,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:07:28,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:07:28,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:07:28,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:07:28,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:07:28,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:07:28,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:07:28,535 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=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 06:07:28,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:07:28,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:07:28,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:07:28,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:07:28,852 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:07:28,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-08-19 06:07:28,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e992c25b6/2054dae558b84d48bb3498ae3c531d58/FLAGfc9a3f643 [2020-08-19 06:07:29,370 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:07:29,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-1.i [2020-08-19 06:07:29,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e992c25b6/2054dae558b84d48bb3498ae3c531d58/FLAGfc9a3f643 [2020-08-19 06:07:29,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e992c25b6/2054dae558b84d48bb3498ae3c531d58 [2020-08-19 06:07:29,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:07:29,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:07:29,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:07:29,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:07:29,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:07:29,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:07:29" (1/1) ... [2020-08-19 06:07:29,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ae2273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:29, skipping insertion in model container [2020-08-19 06:07:29,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:07:29" (1/1) ... [2020-08-19 06:07:29,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:07:29,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:07:30,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:07:30,038 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:07:30,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:07:30,198 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:07:30,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30 WrapperNode [2020-08-19 06:07:30,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:07:30,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:07:30,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:07:30,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:07:30,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... [2020-08-19 06:07:30,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:07:30,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:07:30,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:07:30,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:07:30,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:07:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:07:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:07:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 06:07:30,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:07:30,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:07:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:07:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 06:07:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 06:07:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:07:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:07:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:07:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 06:07:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 06:07:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 06:07:30,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 06:07:30,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:07:30,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:07:30,617 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:07:30,618 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-19 06:07:30,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:07:30 BoogieIcfgContainer [2020-08-19 06:07:30,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:07:30,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:07:30,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:07:30,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:07:30,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:07:29" (1/3) ... [2020-08-19 06:07:30,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97dca9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:07:30, skipping insertion in model container [2020-08-19 06:07:30,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:07:30" (2/3) ... [2020-08-19 06:07:30,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97dca9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:07:30, skipping insertion in model container [2020-08-19 06:07:30,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:07:30" (3/3) ... [2020-08-19 06:07:30,634 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-08-19 06:07:30,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:07:30,658 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:07:30,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:07:30,704 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:07:30,705 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:07:30,705 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:07:30,705 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:07:30,705 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:07:30,705 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:07:30,705 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:07:30,706 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:07:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-19 06:07:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:07:30,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:30,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:30,738 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-08-19 06:07:30,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:30,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113659849] [2020-08-19 06:07:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:30,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113659849] [2020-08-19 06:07:30,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:07:30,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:07:30,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817976546] [2020-08-19 06:07:30,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:07:30,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:07:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:07:31,003 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-08-19 06:07:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:31,219 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-08-19 06:07:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:07:31,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-19 06:07:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:31,233 INFO L225 Difference]: With dead ends: 73 [2020-08-19 06:07:31,234 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 06:07:31,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:07:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 06:07:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-08-19 06:07:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:07:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-08-19 06:07:31,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-08-19 06:07:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:31,280 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-08-19 06:07:31,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:07:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-08-19 06:07:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 06:07:31,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:31,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:31,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:07:31,283 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-08-19 06:07:31,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:31,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751097388] [2020-08-19 06:07:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:31,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:07:31,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751097388] [2020-08-19 06:07:31,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:31,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:07:31,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876865234] [2020-08-19 06:07:31,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:07:31,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:31,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:07:31,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:07:31,370 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-08-19 06:07:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:31,490 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-08-19 06:07:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:07:31,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-19 06:07:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:31,492 INFO L225 Difference]: With dead ends: 65 [2020-08-19 06:07:31,493 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 06:07:31,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:07:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 06:07:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-08-19 06:07:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 06:07:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-19 06:07:31,502 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2020-08-19 06:07:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:31,503 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-19 06:07:31,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:07:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-19 06:07:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 06:07:31,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:31,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:31,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:07:31,506 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:31,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1067646812, now seen corresponding path program 2 times [2020-08-19 06:07:31,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:31,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472064774] [2020-08-19 06:07:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:31,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 06:07:31,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472064774] [2020-08-19 06:07:31,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:31,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:07:31,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538080515] [2020-08-19 06:07:31,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:07:31,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:07:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:07:31,635 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-08-19 06:07:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:31,775 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-08-19 06:07:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:07:31,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-08-19 06:07:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:31,778 INFO L225 Difference]: With dead ends: 75 [2020-08-19 06:07:31,778 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 06:07:31,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:07:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 06:07:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-08-19 06:07:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 06:07:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-08-19 06:07:31,787 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-08-19 06:07:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:31,787 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-08-19 06:07:31,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:07:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-08-19 06:07:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 06:07:31,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:31,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:31,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:07:31,790 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1245957476, now seen corresponding path program 3 times [2020-08-19 06:07:31,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:31,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571863536] [2020-08-19 06:07:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:31,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-19 06:07:31,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571863536] [2020-08-19 06:07:31,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:31,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:07:31,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101796607] [2020-08-19 06:07:31,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:07:31,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:07:31,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:07:31,913 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2020-08-19 06:07:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:32,041 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-08-19 06:07:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:07:32,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-19 06:07:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:32,043 INFO L225 Difference]: With dead ends: 85 [2020-08-19 06:07:32,043 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 06:07:32,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:07:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 06:07:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-19 06:07:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 06:07:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-08-19 06:07:32,052 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-08-19 06:07:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:32,052 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-08-19 06:07:32,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:07:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-08-19 06:07:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:07:32,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:32,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:32,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:07:32,055 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:32,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 4 times [2020-08-19 06:07:32,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:32,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991034841] [2020-08-19 06:07:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:32,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 06:07:32,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991034841] [2020-08-19 06:07:32,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:32,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:07:32,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839647800] [2020-08-19 06:07:32,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:07:32,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:07:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:07:32,207 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2020-08-19 06:07:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:32,373 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-08-19 06:07:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:07:32,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 06:07:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:32,375 INFO L225 Difference]: With dead ends: 93 [2020-08-19 06:07:32,375 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 06:07:32,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:07:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 06:07:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-19 06:07:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 06:07:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-08-19 06:07:32,384 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-08-19 06:07:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:32,384 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-08-19 06:07:32,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:07:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-08-19 06:07:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 06:07:32,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:32,386 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:32,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:07:32,387 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 5 times [2020-08-19 06:07:32,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:32,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531373612] [2020-08-19 06:07:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:32,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-19 06:07:32,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531373612] [2020-08-19 06:07:32,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:07:32,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:07:32,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49429121] [2020-08-19 06:07:32,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:07:32,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:07:32,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:07:32,523 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-08-19 06:07:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:32,653 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-19 06:07:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:07:32,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-08-19 06:07:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:32,658 INFO L225 Difference]: With dead ends: 62 [2020-08-19 06:07:32,659 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 06:07:32,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:07:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 06:07:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 06:07:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:07:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-08-19 06:07:32,676 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-08-19 06:07:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:32,678 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-08-19 06:07:32,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:07:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-08-19 06:07:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 06:07:32,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:32,681 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:32,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:07:32,682 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-08-19 06:07:32,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:32,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763849092] [2020-08-19 06:07:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:32,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-19 06:07:32,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763849092] [2020-08-19 06:07:32,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:32,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:07:32,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500589719] [2020-08-19 06:07:32,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:07:32,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:07:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:07:32,887 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 9 states. [2020-08-19 06:07:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:33,048 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-08-19 06:07:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:07:33,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-08-19 06:07:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:33,050 INFO L225 Difference]: With dead ends: 55 [2020-08-19 06:07:33,050 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 06:07:33,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:07:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 06:07:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-19 06:07:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-19 06:07:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-19 06:07:33,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-08-19 06:07:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:33,057 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-19 06:07:33,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:07:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-19 06:07:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 06:07:33,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:33,059 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:33,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:07:33,059 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-08-19 06:07:33,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:33,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132082331] [2020-08-19 06:07:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:33,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-08-19 06:07:33,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132082331] [2020-08-19 06:07:33,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:07:33,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:07:33,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626967804] [2020-08-19 06:07:33,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:07:33,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:33,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:07:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:07:33,152 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-19 06:07:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:33,215 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-08-19 06:07:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:07:33,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-08-19 06:07:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:33,218 INFO L225 Difference]: With dead ends: 67 [2020-08-19 06:07:33,218 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 06:07:33,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:07:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 06:07:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 06:07:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 06:07:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-08-19 06:07:33,225 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-08-19 06:07:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:33,226 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-08-19 06:07:33,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:07:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-08-19 06:07:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 06:07:33,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:33,227 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:33,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:07:33,228 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-08-19 06:07:33,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:33,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491955901] [2020-08-19 06:07:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:33,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-08-19 06:07:33,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491955901] [2020-08-19 06:07:33,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:33,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:07:33,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843836287] [2020-08-19 06:07:33,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:07:33,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:07:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:07:33,355 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2020-08-19 06:07:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:33,532 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-08-19 06:07:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:07:33,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-08-19 06:07:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:33,536 INFO L225 Difference]: With dead ends: 70 [2020-08-19 06:07:33,536 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 06:07:33,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:07:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 06:07:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-19 06:07:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-19 06:07:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-08-19 06:07:33,544 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 50 [2020-08-19 06:07:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:33,545 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-08-19 06:07:33,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:07:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-08-19 06:07:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 06:07:33,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:33,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:33,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:07:33,550 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1926047290, now seen corresponding path program 2 times [2020-08-19 06:07:33,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:33,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288109138] [2020-08-19 06:07:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-08-19 06:07:33,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288109138] [2020-08-19 06:07:33,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:33,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:07:33,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81403826] [2020-08-19 06:07:33,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:07:33,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:33,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:07:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:07:33,717 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2020-08-19 06:07:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:33,932 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-08-19 06:07:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:07:33,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-08-19 06:07:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:33,933 INFO L225 Difference]: With dead ends: 61 [2020-08-19 06:07:33,933 INFO L226 Difference]: Without dead ends: 55 [2020-08-19 06:07:33,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:07:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-19 06:07:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-19 06:07:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 06:07:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-08-19 06:07:33,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 52 [2020-08-19 06:07:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:33,948 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-08-19 06:07:33,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:07:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-08-19 06:07:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 06:07:33,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:33,950 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:33,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:07:33,950 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:33,951 INFO L82 PathProgramCache]: Analyzing trace with hash 477761629, now seen corresponding path program 3 times [2020-08-19 06:07:33,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:33,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585808598] [2020-08-19 06:07:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-08-19 06:07:34,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585808598] [2020-08-19 06:07:34,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:34,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:07:34,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158344686] [2020-08-19 06:07:34,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:07:34,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:34,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:07:34,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:07:34,013 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 7 states. [2020-08-19 06:07:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:34,097 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-08-19 06:07:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:07:34,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-08-19 06:07:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:34,099 INFO L225 Difference]: With dead ends: 86 [2020-08-19 06:07:34,099 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 06:07:34,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:07:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 06:07:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-08-19 06:07:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 06:07:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-08-19 06:07:34,107 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 54 [2020-08-19 06:07:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:34,108 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-08-19 06:07:34,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:07:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-08-19 06:07:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:07:34,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:34,109 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:34,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:07:34,110 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash 945709890, now seen corresponding path program 1 times [2020-08-19 06:07:34,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:34,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359032734] [2020-08-19 06:07:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-08-19 06:07:34,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359032734] [2020-08-19 06:07:34,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:34,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:07:34,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636980408] [2020-08-19 06:07:34,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:07:34,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:07:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:07:34,189 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 8 states. [2020-08-19 06:07:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:34,293 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-19 06:07:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:07:34,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-08-19 06:07:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:34,295 INFO L225 Difference]: With dead ends: 79 [2020-08-19 06:07:34,295 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:07:34,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:07:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:07:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 06:07:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 06:07:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-08-19 06:07:34,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 56 [2020-08-19 06:07:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:34,302 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-08-19 06:07:34,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:07:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-08-19 06:07:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:07:34,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:34,303 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:34,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:07:34,304 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1888314782, now seen corresponding path program 4 times [2020-08-19 06:07:34,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:34,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493946234] [2020-08-19 06:07:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-08-19 06:07:34,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493946234] [2020-08-19 06:07:34,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:34,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:07:34,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021276569] [2020-08-19 06:07:34,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:07:34,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:07:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:07:34,435 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 12 states. [2020-08-19 06:07:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:34,661 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-08-19 06:07:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:07:34,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-08-19 06:07:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:34,663 INFO L225 Difference]: With dead ends: 80 [2020-08-19 06:07:34,663 INFO L226 Difference]: Without dead ends: 59 [2020-08-19 06:07:34,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:07:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-19 06:07:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-19 06:07:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 06:07:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-08-19 06:07:34,669 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 56 [2020-08-19 06:07:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:34,669 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-08-19 06:07:34,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:07:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-08-19 06:07:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 06:07:34,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:34,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:34,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:07:34,671 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:34,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1242276355, now seen corresponding path program 5 times [2020-08-19 06:07:34,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:34,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098525417] [2020-08-19 06:07:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-08-19 06:07:34,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098525417] [2020-08-19 06:07:34,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:34,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:07:34,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987859780] [2020-08-19 06:07:34,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:07:34,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:07:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:07:34,800 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 13 states. [2020-08-19 06:07:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:35,080 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-08-19 06:07:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:07:35,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-08-19 06:07:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:35,082 INFO L225 Difference]: With dead ends: 67 [2020-08-19 06:07:35,082 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 06:07:35,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:07:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 06:07:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-19 06:07:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 06:07:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-08-19 06:07:35,089 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-08-19 06:07:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:35,089 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-08-19 06:07:35,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:07:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-08-19 06:07:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 06:07:35,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:35,090 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:35,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:07:35,091 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash 850551648, now seen corresponding path program 6 times [2020-08-19 06:07:35,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:35,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78485007] [2020-08-19 06:07:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:35,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-19 06:07:35,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78485007] [2020-08-19 06:07:35,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:35,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:07:35,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861338242] [2020-08-19 06:07:35,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:07:35,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:07:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:07:35,168 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 9 states. [2020-08-19 06:07:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:35,305 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-08-19 06:07:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:07:35,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-08-19 06:07:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:35,306 INFO L225 Difference]: With dead ends: 100 [2020-08-19 06:07:35,307 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 06:07:35,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:07:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 06:07:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2020-08-19 06:07:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-19 06:07:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-19 06:07:35,315 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 60 [2020-08-19 06:07:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:35,315 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-19 06:07:35,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:07:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-19 06:07:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 06:07:35,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:35,317 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:35,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:07:35,317 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1426761989, now seen corresponding path program 2 times [2020-08-19 06:07:35,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:35,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642234920] [2020-08-19 06:07:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:35,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-19 06:07:35,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642234920] [2020-08-19 06:07:35,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:35,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:07:35,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022539874] [2020-08-19 06:07:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:07:35,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:35,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:07:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:07:35,437 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 10 states. [2020-08-19 06:07:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:35,561 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2020-08-19 06:07:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:07:35,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-08-19 06:07:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:35,562 INFO L225 Difference]: With dead ends: 102 [2020-08-19 06:07:35,563 INFO L226 Difference]: Without dead ends: 88 [2020-08-19 06:07:35,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:07:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-19 06:07:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-08-19 06:07:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 06:07:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-19 06:07:35,570 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 62 [2020-08-19 06:07:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:35,571 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-19 06:07:35,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:07:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-19 06:07:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 06:07:35,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:35,572 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:35,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:07:35,572 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1340435035, now seen corresponding path program 7 times [2020-08-19 06:07:35,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:35,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30539613] [2020-08-19 06:07:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:35,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-19 06:07:35,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30539613] [2020-08-19 06:07:35,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:35,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:07:35,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588484355] [2020-08-19 06:07:35,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:07:35,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:07:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:07:35,717 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 14 states. [2020-08-19 06:07:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:35,960 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-08-19 06:07:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:07:35,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-08-19 06:07:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:35,961 INFO L225 Difference]: With dead ends: 115 [2020-08-19 06:07:35,962 INFO L226 Difference]: Without dead ends: 83 [2020-08-19 06:07:35,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:07:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-19 06:07:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-08-19 06:07:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 06:07:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-08-19 06:07:35,969 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 62 [2020-08-19 06:07:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:35,969 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-08-19 06:07:35,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:07:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-08-19 06:07:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-19 06:07:35,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:35,970 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:35,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:07:35,971 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1186490752, now seen corresponding path program 8 times [2020-08-19 06:07:35,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:35,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189671174] [2020-08-19 06:07:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:36,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-19 06:07:36,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189671174] [2020-08-19 06:07:36,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:36,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:07:36,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847551038] [2020-08-19 06:07:36,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:07:36,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:07:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:07:36,128 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 15 states. [2020-08-19 06:07:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:36,470 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-08-19 06:07:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:07:36,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-08-19 06:07:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:36,471 INFO L225 Difference]: With dead ends: 91 [2020-08-19 06:07:36,471 INFO L226 Difference]: Without dead ends: 85 [2020-08-19 06:07:36,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:07:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-19 06:07:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-08-19 06:07:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 06:07:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-19 06:07:36,478 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 64 [2020-08-19 06:07:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:36,478 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-19 06:07:36,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:07:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-19 06:07:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:07:36,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:36,479 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:36,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:07:36,480 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1374058717, now seen corresponding path program 9 times [2020-08-19 06:07:36,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:36,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695783503] [2020-08-19 06:07:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-19 06:07:36,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695783503] [2020-08-19 06:07:36,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:36,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:07:36,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633368507] [2020-08-19 06:07:36,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:07:36,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:07:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:07:36,583 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 11 states. [2020-08-19 06:07:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:36,780 INFO L93 Difference]: Finished difference Result 143 states and 173 transitions. [2020-08-19 06:07:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:07:36,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-08-19 06:07:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:36,782 INFO L225 Difference]: With dead ends: 143 [2020-08-19 06:07:36,782 INFO L226 Difference]: Without dead ends: 127 [2020-08-19 06:07:36,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:07:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-19 06:07:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 103. [2020-08-19 06:07:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 06:07:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-08-19 06:07:36,791 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 66 [2020-08-19 06:07:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:36,792 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-08-19 06:07:36,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:07:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-08-19 06:07:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 06:07:36,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:36,793 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:36,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:07:36,793 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2063125144, now seen corresponding path program 3 times [2020-08-19 06:07:36,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:36,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514479758] [2020-08-19 06:07:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:36,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-19 06:07:36,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514479758] [2020-08-19 06:07:36,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:36,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:07:36,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658704713] [2020-08-19 06:07:36,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:07:36,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:07:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:07:36,883 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 10 states. [2020-08-19 06:07:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:37,018 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-08-19 06:07:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:07:37,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-19 06:07:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:37,019 INFO L225 Difference]: With dead ends: 121 [2020-08-19 06:07:37,019 INFO L226 Difference]: Without dead ends: 87 [2020-08-19 06:07:37,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:07:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-19 06:07:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-19 06:07:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 06:07:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-19 06:07:37,026 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 68 [2020-08-19 06:07:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:37,026 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-19 06:07:37,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:07:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-19 06:07:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 06:07:37,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:37,027 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:37,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:07:37,028 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1776856968, now seen corresponding path program 4 times [2020-08-19 06:07:37,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:37,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85144519] [2020-08-19 06:07:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:37,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-19 06:07:37,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85144519] [2020-08-19 06:07:37,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:37,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:07:37,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838067957] [2020-08-19 06:07:37,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:07:37,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:07:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:07:37,114 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 11 states. [2020-08-19 06:07:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:37,256 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2020-08-19 06:07:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:07:37,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-08-19 06:07:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:37,258 INFO L225 Difference]: With dead ends: 118 [2020-08-19 06:07:37,258 INFO L226 Difference]: Without dead ends: 102 [2020-08-19 06:07:37,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:07:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-19 06:07:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-08-19 06:07:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 06:07:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-08-19 06:07:37,274 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 68 [2020-08-19 06:07:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:37,274 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-08-19 06:07:37,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:07:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-08-19 06:07:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 06:07:37,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:37,275 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:37,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:07:37,276 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:37,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1222495832, now seen corresponding path program 10 times [2020-08-19 06:07:37,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:37,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631053976] [2020-08-19 06:07:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-19 06:07:37,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631053976] [2020-08-19 06:07:37,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:37,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:07:37,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317007303] [2020-08-19 06:07:37,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:07:37,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:37,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:07:37,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:07:37,416 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 16 states. [2020-08-19 06:07:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:37,720 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-08-19 06:07:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:07:37,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-08-19 06:07:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:37,722 INFO L225 Difference]: With dead ends: 135 [2020-08-19 06:07:37,722 INFO L226 Difference]: Without dead ends: 95 [2020-08-19 06:07:37,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:07:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-19 06:07:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-08-19 06:07:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 06:07:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2020-08-19 06:07:37,730 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 68 [2020-08-19 06:07:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:37,730 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2020-08-19 06:07:37,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:07:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2020-08-19 06:07:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-19 06:07:37,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:37,732 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:37,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:07:37,732 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1314701251, now seen corresponding path program 11 times [2020-08-19 06:07:37,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:37,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917909873] [2020-08-19 06:07:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:38,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 06:07:38,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917909873] [2020-08-19 06:07:38,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:38,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:07:38,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294628627] [2020-08-19 06:07:38,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:07:38,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:38,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:07:38,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:07:38,065 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 13 states. [2020-08-19 06:07:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:38,202 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-08-19 06:07:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:07:38,202 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-08-19 06:07:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:38,202 INFO L225 Difference]: With dead ends: 95 [2020-08-19 06:07:38,203 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:07:38,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:07:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:07:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:07:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:07:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:07:38,204 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2020-08-19 06:07:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:38,205 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:07:38,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:07:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:07:38,205 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:07:38,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:07:38,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:07:38,438 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 136 [2020-08-19 06:07:39,767 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 132 DAG size of output: 63 [2020-08-19 06:07:39,879 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2020-08-19 06:07:40,081 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 25 [2020-08-19 06:07:40,087 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:07:40,087 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:07:40,088 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:07:40,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-08-19 06:07:40,088 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-08-19 06:07:40,089 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (let ((.cse0 (<= main_~nc_A~0 2)) (.cse1 (<= 1 main_~nc_B~0)) (.cse4 (= (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4)) 0)) (.cse3 (= main_~nc_B~0 0)) (.cse5 (= |main_~#string_B~0.offset| 0)) (.cse2 (= 0 main_~found~0))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse2) (and .cse4 .cse5 (<= main_~nc_B~0 4) .cse1 .cse2) (and .cse4 .cse3 .cse5 .cse2))) [2020-08-19 06:07:40,089 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-08-19 06:07:40,089 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-08-19 06:07:40,089 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (and (= (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4)) 0) (= |main_~#string_B~0.offset| 0) (= 0 main_~found~0)) [2020-08-19 06:07:40,089 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-08-19 06:07:40,090 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-08-19 06:07:40,090 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-08-19 06:07:40,090 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (let ((.cse13 (+ main_~j~0 1)) (.cse8 (+ main_~j~0 3))) (let ((.cse1 (<= main_~nc_A~0 2)) (.cse2 (<= main_~nc_A~0 (+ main_~i~0 1))) (.cse10 (<= main_~nc_B~0 3)) (.cse7 (= main_~i~0 main_~j~0)) (.cse5 (<= main_~nc_A~0 main_~i~0)) (.cse4 (<= 3 main_~nc_B~0)) (.cse9 (<= .cse8 main_~nc_B~0)) (.cse0 (<= 4 main_~nc_B~0)) (.cse16 (<= main_~nc_B~0 4)) (.cse12 (= main_~i~0 0)) (.cse6 (<= .cse13 main_~nc_B~0)) (.cse14 (<= 1 main_~nc_B~0)) (.cse15 (<= 2 main_~nc_B~0)) (.cse11 (<= main_~nc_B~0 (+ main_~j~0 2))) (.cse3 (= 0 main_~found~0))) (or (and .cse0 (= main_~j~0 0) .cse1 .cse2 .cse3) (and .cse4 .cse5 .cse6 .cse1 .cse3) (and (<= 0 main_~j~0) (= main_~nc_B~0 0)) (and .cse0 .cse6 .cse1 .cse2 .cse7 .cse3) (and .cse4 (<= main_~nc_B~0 .cse8) .cse9 .cse10 .cse3) (and .cse4 .cse0 .cse5 .cse6 (<= main_~nc_A~0 3) .cse3) (and .cse4 .cse11 .cse10 .cse3) (and .cse12 .cse6 .cse7 .cse3 (<= main_~nc_A~0 (+ main_~i~0 2))) (and (<= main_~nc_B~0 1) (<= main_~nc_B~0 .cse13) .cse14 .cse3) (and .cse15 .cse5 .cse6 (<= main_~nc_A~0 1) .cse3) (and (<= main_~nc_B~0 (+ main_~j~0 4)) .cse4 .cse0 .cse9 .cse16 .cse3) (and .cse0 .cse11 .cse16 .cse3) (and (= main_~nc_A~0 0) .cse12 .cse6 .cse14 .cse3) (and .cse15 .cse11 (<= main_~nc_B~0 2) .cse3)))) [2020-08-19 06:07:40,090 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-08-19 06:07:40,090 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-08-19 06:07:40,091 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (+ main_~j~0 1)) (.cse2 (<= 1 main_~nc_B~0)) (.cse3 (<= main_~nc_B~0 main_~j~0)) (.cse1 (= 1 main_~found~0))) (or (and (< main_~nc_B~0 .cse0) (<= main_~nc_B~0 2) .cse1 .cse2) (and (<= 3 main_~nc_B~0) .cse3 (<= main_~nc_B~0 3) .cse1) (and (<= 0 main_~j~0) (= main_~nc_B~0 0) .cse1) (and (<= .cse0 main_~nc_B~0) .cse2 (= 0 main_~found~0)) (and (<= 4 main_~nc_B~0) .cse3 (<= main_~nc_B~0 4) .cse1))) [2020-08-19 06:07:40,091 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-08-19 06:07:40,091 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-08-19 06:07:40,091 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-08-19 06:07:40,091 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-19 06:07:40,091 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-08-19 06:07:40,092 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (and (= |main_~#string_B~0.offset| 0) (= 0 main_~found~0)) [2020-08-19 06:07:40,092 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-08-19 06:07:40,092 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-08-19 06:07:40,092 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (and (= |main_~#string_B~0.offset| 0) (= 0 main_~found~0)) [2020-08-19 06:07:40,092 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-08-19 06:07:40,092 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-08-19 06:07:40,092 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-08-19 06:07:40,092 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-19 06:07:40,093 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-08-19 06:07:40,093 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-08-19 06:07:40,093 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-08-19 06:07:40,093 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-08-19 06:07:40,105 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,112 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,127 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,127 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,128 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,128 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:07:40 BoogieIcfgContainer [2020-08-19 06:07:40,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:07:40,138 INFO L168 Benchmark]: Toolchain (without parser) took 10421.63 ms. Allocated memory was 141.0 MB in the beginning and 327.2 MB in the end (delta: 186.1 MB). Free memory was 103.3 MB in the beginning and 209.0 MB in the end (delta: -105.7 MB). Peak memory consumption was 191.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:40,139 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 06:07:40,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.08 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.1 MB in the beginning and 182.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:40,140 INFO L168 Benchmark]: Boogie Preprocessor took 44.22 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. [2020-08-19 06:07:40,141 INFO L168 Benchmark]: RCFGBuilder took 379.44 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 160.4 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:40,142 INFO L168 Benchmark]: TraceAbstraction took 9507.76 ms. Allocated memory was 203.4 MB in the beginning and 327.2 MB in the end (delta: 123.7 MB). Free memory was 160.4 MB in the beginning and 209.0 MB in the end (delta: -48.5 MB). Peak memory consumption was 186.5 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:40,150 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 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 484.08 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.1 MB in the beginning and 182.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.22 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 379.44 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 160.4 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9507.76 ms. Allocated memory was 203.4 MB in the beginning and 327.2 MB in the end (delta: 123.7 MB). Free memory was 160.4 MB in the beginning and 209.0 MB in the end (delta: -48.5 MB). Peak memory consumption was 186.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant [2020-08-19 06:07:40,163 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,164 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (unknown-#memory_int-unknown[string_B][string_B + 4] == 0 && string_B == 0) && 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: string_B == 0 && 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: string_B == 0 && 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((((4 <= nc_B && j == 0) && nc_A <= 2) && nc_A <= i + 1) && 0 == found) || ((((3 <= nc_B && nc_A <= i) && j + 1 <= nc_B) && nc_A <= 2) && 0 == found)) || (0 <= j && nc_B == 0)) || (((((4 <= nc_B && j + 1 <= nc_B) && nc_A <= 2) && nc_A <= i + 1) && i == j) && 0 == found)) || ((((3 <= nc_B && nc_B <= j + 3) && j + 3 <= nc_B) && nc_B <= 3) && 0 == found)) || (((((3 <= nc_B && 4 <= nc_B) && nc_A <= i) && j + 1 <= nc_B) && nc_A <= 3) && 0 == found)) || (((3 <= nc_B && nc_B <= j + 2) && nc_B <= 3) && 0 == found)) || ((((i == 0 && j + 1 <= nc_B) && i == j) && 0 == found) && nc_A <= i + 2)) || (((nc_B <= 1 && nc_B <= j + 1) && 1 <= nc_B) && 0 == found)) || ((((2 <= nc_B && nc_A <= i) && j + 1 <= nc_B) && nc_A <= 1) && 0 == found)) || (((((nc_B <= j + 4 && 3 <= nc_B) && 4 <= nc_B) && j + 3 <= nc_B) && nc_B <= 4) && 0 == found)) || (((4 <= nc_B && nc_B <= j + 2) && nc_B <= 4) && 0 == found)) || ((((nc_A == 0 && i == 0) && j + 1 <= nc_B) && 1 <= nc_B) && 0 == found)) || (((2 <= nc_B && nc_B <= j + 2) && nc_B <= 2) && 0 == found) - InvariantResult [Line: 35]: Loop Invariant [2020-08-19 06:07:40,168 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,169 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,169 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-19 06:07:40,169 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((nc_A <= 2 && 1 <= nc_B) && 0 == found) || ((nc_B == 0 && nc_A <= 2) && 0 == found)) || ((((unknown-#memory_int-unknown[string_B][string_B + 4] == 0 && string_B == 0) && nc_B <= 4) && 1 <= nc_B) && 0 == found)) || (((unknown-#memory_int-unknown[string_B][string_B + 4] == 0 && nc_B == 0) && string_B == 0) && 0 == found) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 23, TraceHistogramMax: 6, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 545 SDtfs, 447 SDslu, 2131 SDs, 0 SdLazy, 2824 SolverSat, 308 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 326 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=19, 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, 23 MinimizatonAttempts, 128 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 38 PreInvPairs, 118 NumberOfFragments, 419 HoareAnnotationTreeSize, 38 FomulaSimplifications, 7556 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4917 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1210 NumberOfCodeBlocks, 1210 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1187 ConstructedInterpolants, 0 QuantifiedInterpolants, 151099 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 1261/1470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...