/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:15:06,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:15:06,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:15:06,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:15:06,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:15:06,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:15:06,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:15:06,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:15:06,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:15:06,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:15:06,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:15:06,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:15:06,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:15:06,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:15:06,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:15:06,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:15:06,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:15:06,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:15:06,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:15:06,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:15:06,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:15:06,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:15:06,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:15:06,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:15:06,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:15:06,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:15:06,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:15:06,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:15:06,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:15:06,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 12:15:06,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:15:06,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:15:06,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:15:06,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:15:06,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:15:06,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:15:06,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:15:06,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:15:06,719 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:15:06,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:15:06,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:15:06,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:15:06,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:15:06,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:15:06,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:15:06,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:15:06,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:15:06,722 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:15:06,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:15:06,722 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:15:06,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:15:06,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:15:06,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:15:06,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:15:06,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:15:06,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:15:06,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:15:06,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:15:06,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:15:06,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:15:06,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:15:06,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:15:06,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:15:06,725 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:15:07,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:15:07,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:15:07,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:15:07,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:15:07,084 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:15:07,085 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 12:15:07,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84928f9df/9692bf1273ec4f12aa06702d04cc0485/FLAG75d7fe907 [2020-08-18 12:15:07,608 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:15:07,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 12:15:07,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84928f9df/9692bf1273ec4f12aa06702d04cc0485/FLAG75d7fe907 [2020-08-18 12:15:07,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84928f9df/9692bf1273ec4f12aa06702d04cc0485 [2020-08-18 12:15:07,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:15:07,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:15:07,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:15:07,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:15:07,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:15:08,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:15:07" (1/1) ... [2020-08-18 12:15:08,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3336fb4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08, skipping insertion in model container [2020-08-18 12:15:08,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:15:07" (1/1) ... [2020-08-18 12:15:08,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:15:08,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:15:08,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:15:08,234 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:15:08,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:15:08,277 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:15:08,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08 WrapperNode [2020-08-18 12:15:08,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:15:08,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:15:08,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:15:08,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:15:08,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... [2020-08-18 12:15:08,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:15:08,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:15:08,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:15:08,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:15:08,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:15:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:15:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:15:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 12:15:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-18 12:15:08,478 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-18 12:15:08,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:15:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:15:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 12:15:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:15:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-18 12:15:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:15:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-18 12:15:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:15:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:15:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 12:15:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:15:08,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:15:08,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:15:08,867 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:15:08,867 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-18 12:15:08,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:15:08 BoogieIcfgContainer [2020-08-18 12:15:08,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:15:08,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:15:08,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:15:08,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:15:08,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:15:07" (1/3) ... [2020-08-18 12:15:08,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377043a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:15:08, skipping insertion in model container [2020-08-18 12:15:08,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:15:08" (2/3) ... [2020-08-18 12:15:08,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377043a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:15:08, skipping insertion in model container [2020-08-18 12:15:08,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:15:08" (3/3) ... [2020-08-18 12:15:08,881 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-18 12:15:08,892 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:15:08,898 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:15:08,913 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:15:08,938 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:15:08,938 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:15:08,938 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:15:08,938 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:15:08,939 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:15:08,939 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:15:08,939 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:15:08,939 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:15:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 12:15:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 12:15:08,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:08,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:08,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-18 12:15:08,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:08,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586292862] [2020-08-18 12:15:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:09,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:09,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586292862] [2020-08-18 12:15:09,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:09,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:15:09,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915031635] [2020-08-18 12:15:09,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 12:15:09,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:09,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 12:15:09,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 12:15:09,283 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 12:15:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:09,610 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-18 12:15:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 12:15:09,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 12:15:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:09,625 INFO L225 Difference]: With dead ends: 150 [2020-08-18 12:15:09,625 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 12:15:09,630 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 [2020-08-18 12:15:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 12:15:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-18 12:15:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 12:15:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-18 12:15:09,690 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-18 12:15:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:09,691 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-18 12:15:09,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 12:15:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-18 12:15:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 12:15:09,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:09,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:09,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:15:09,693 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:09,694 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-18 12:15:09,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:09,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419725030] [2020-08-18 12:15:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:09,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:09,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419725030] [2020-08-18 12:15:09,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:09,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 12:15:09,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585009101] [2020-08-18 12:15:09,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:15:09,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:15:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:15:09,800 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-18 12:15:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:10,132 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-18 12:15:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:15:10,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 12:15:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:10,135 INFO L225 Difference]: With dead ends: 170 [2020-08-18 12:15:10,135 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 12:15:10,137 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 [2020-08-18 12:15:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 12:15:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-18 12:15:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 12:15:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-18 12:15:10,152 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-18 12:15:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:10,152 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-18 12:15:10,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:15:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-18 12:15:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 12:15:10,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:10,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:10,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:15:10,154 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-18 12:15:10,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:10,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526949921] [2020-08-18 12:15:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:10,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:10,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526949921] [2020-08-18 12:15:10,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:10,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:15:10,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724827023] [2020-08-18 12:15:10,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:15:10,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:15:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:15:10,228 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-18 12:15:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:10,521 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-18 12:15:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:15:10,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 12:15:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:10,525 INFO L225 Difference]: With dead ends: 203 [2020-08-18 12:15:10,528 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 12:15:10,530 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 [2020-08-18 12:15:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 12:15:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-18 12:15:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 12:15:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-18 12:15:10,558 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-18 12:15:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:10,561 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-18 12:15:10,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:15:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-18 12:15:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 12:15:10,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:10,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:10,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:15:10,563 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-18 12:15:10,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:10,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38338243] [2020-08-18 12:15:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:10,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38338243] [2020-08-18 12:15:10,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:10,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:15:10,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232538652] [2020-08-18 12:15:10,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:15:10,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:10,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:15:10,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:15:10,693 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-18 12:15:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:11,122 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-18 12:15:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:15:11,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-18 12:15:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:11,125 INFO L225 Difference]: With dead ends: 236 [2020-08-18 12:15:11,125 INFO L226 Difference]: Without dead ends: 188 [2020-08-18 12:15:11,129 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 [2020-08-18 12:15:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-18 12:15:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-18 12:15:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 12:15:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-18 12:15:11,153 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-18 12:15:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:11,156 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-18 12:15:11,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:15:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-18 12:15:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 12:15:11,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:11,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:11,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:15:11,158 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-18 12:15:11,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:11,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571067319] [2020-08-18 12:15:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 12:15:11,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571067319] [2020-08-18 12:15:11,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:11,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:15:11,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515064382] [2020-08-18 12:15:11,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:15:11,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:15:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:15:11,235 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-18 12:15:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:11,338 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-18 12:15:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:15:11,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 12:15:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:11,340 INFO L225 Difference]: With dead ends: 116 [2020-08-18 12:15:11,340 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 12:15:11,341 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 [2020-08-18 12:15:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 12:15:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-18 12:15:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 12:15:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-18 12:15:11,348 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-18 12:15:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:11,349 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-18 12:15:11,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:15:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-18 12:15:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 12:15:11,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:11,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:11,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:15:11,351 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:11,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-18 12:15:11,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:11,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531149679] [2020-08-18 12:15:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 12:15:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:15:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:11,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531149679] [2020-08-18 12:15:11,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:11,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:15:11,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645504302] [2020-08-18 12:15:11,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:15:11,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:15:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:15:11,454 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-18 12:15:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:11,834 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-18 12:15:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:15:11,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-18 12:15:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:11,836 INFO L225 Difference]: With dead ends: 223 [2020-08-18 12:15:11,837 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 12:15:11,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:15:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 12:15:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-18 12:15:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 12:15:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-18 12:15:11,848 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-18 12:15:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:11,848 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-18 12:15:11,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:15:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-18 12:15:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 12:15:11,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:11,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:11,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:15:11,851 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-18 12:15:11,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:11,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067413145] [2020-08-18 12:15:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 12:15:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 12:15:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:11,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067413145] [2020-08-18 12:15:11,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:11,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:15:11,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983806456] [2020-08-18 12:15:11,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:15:11,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:15:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:15:11,974 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-18 12:15:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:12,426 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-18 12:15:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 12:15:12,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 12:15:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:12,429 INFO L225 Difference]: With dead ends: 246 [2020-08-18 12:15:12,430 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 12:15:12,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:15:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 12:15:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-18 12:15:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 12:15:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-18 12:15:12,450 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-18 12:15:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:12,451 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-18 12:15:12,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:15:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-18 12:15:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 12:15:12,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:12,453 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:12,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:15:12,453 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:12,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-18 12:15:12,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:12,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764807252] [2020-08-18 12:15:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:12,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 12:15:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 12:15:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:12,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764807252] [2020-08-18 12:15:12,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:12,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 12:15:12,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082140866] [2020-08-18 12:15:12,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 12:15:12,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 12:15:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:15:12,574 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-18 12:15:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:13,075 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-18 12:15:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 12:15:13,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 12:15:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:13,079 INFO L225 Difference]: With dead ends: 269 [2020-08-18 12:15:13,079 INFO L226 Difference]: Without dead ends: 219 [2020-08-18 12:15:13,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:15:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-18 12:15:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-18 12:15:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 12:15:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-18 12:15:13,104 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-18 12:15:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:13,105 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-18 12:15:13,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 12:15:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-18 12:15:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 12:15:13,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:13,107 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:13,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:15:13,107 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-18 12:15:13,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:13,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837628476] [2020-08-18 12:15:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:15:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:15:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:13,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837628476] [2020-08-18 12:15:13,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:13,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 12:15:13,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600736668] [2020-08-18 12:15:13,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:15:13,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:15:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:15:13,278 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-18 12:15:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:13,814 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-18 12:15:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:15:13,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-18 12:15:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:13,818 INFO L225 Difference]: With dead ends: 292 [2020-08-18 12:15:13,818 INFO L226 Difference]: Without dead ends: 242 [2020-08-18 12:15:13,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:15:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-18 12:15:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-18 12:15:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 12:15:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-18 12:15:13,830 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-18 12:15:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:13,830 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-18 12:15:13,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:15:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-18 12:15:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 12:15:13,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:13,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:13,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:15:13,832 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-18 12:15:13,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:13,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885117976] [2020-08-18 12:15:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 12:15:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:15:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:13,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885117976] [2020-08-18 12:15:13,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:13,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 12:15:13,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072903682] [2020-08-18 12:15:13,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 12:15:13,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 12:15:13,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:15:13,968 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-18 12:15:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:14,534 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-18 12:15:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:15:14,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-18 12:15:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:14,537 INFO L225 Difference]: With dead ends: 315 [2020-08-18 12:15:14,537 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 12:15:14,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:15:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 12:15:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-18 12:15:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 12:15:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-18 12:15:14,554 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-18 12:15:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:14,555 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-18 12:15:14,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 12:15:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-18 12:15:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 12:15:14,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:14,557 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:14,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:15:14,558 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-18 12:15:14,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:14,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678273961] [2020-08-18 12:15:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:14,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:14,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 12:15:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 12:15:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:14,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678273961] [2020-08-18 12:15:14,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:14,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 12:15:14,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253040084] [2020-08-18 12:15:14,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 12:15:14,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:14,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 12:15:14,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:15:14,706 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-18 12:15:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:15,347 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-18 12:15:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:15:15,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-18 12:15:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:15,351 INFO L225 Difference]: With dead ends: 338 [2020-08-18 12:15:15,352 INFO L226 Difference]: Without dead ends: 288 [2020-08-18 12:15:15,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:15:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-18 12:15:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-18 12:15:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 12:15:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-18 12:15:15,361 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-18 12:15:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:15,361 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-18 12:15:15,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 12:15:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-18 12:15:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 12:15:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:15,363 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:15,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:15:15,363 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-18 12:15:15,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:15,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40107882] [2020-08-18 12:15:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:15,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:15,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 12:15:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:15,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 12:15:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:15,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40107882] [2020-08-18 12:15:15,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:15,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 12:15:15,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353996097] [2020-08-18 12:15:15,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 12:15:15,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 12:15:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:15:15,517 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-18 12:15:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:16,247 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-18 12:15:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 12:15:16,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-18 12:15:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:16,250 INFO L225 Difference]: With dead ends: 361 [2020-08-18 12:15:16,251 INFO L226 Difference]: Without dead ends: 311 [2020-08-18 12:15:16,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-18 12:15:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-18 12:15:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-18 12:15:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 12:15:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-18 12:15:16,264 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-18 12:15:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:16,264 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-18 12:15:16,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 12:15:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-18 12:15:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 12:15:16,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:16,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:16,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:15:16,266 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-18 12:15:16,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:16,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906465855] [2020-08-18 12:15:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:16,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:16,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 12:15:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:16,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 12:15:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:16,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906465855] [2020-08-18 12:15:16,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:16,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 12:15:16,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925799325] [2020-08-18 12:15:16,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 12:15:16,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 12:15:16,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:15:16,550 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-18 12:15:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:17,372 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-18 12:15:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:15:17,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-18 12:15:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:17,377 INFO L225 Difference]: With dead ends: 384 [2020-08-18 12:15:17,377 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 12:15:17,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-18 12:15:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 12:15:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-18 12:15:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 12:15:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-18 12:15:17,394 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-18 12:15:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:17,394 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-18 12:15:17,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 12:15:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-18 12:15:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 12:15:17,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:17,397 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:17,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 12:15:17,398 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-18 12:15:17,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:17,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793323057] [2020-08-18 12:15:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:17,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:17,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 12:15:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:17,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 12:15:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:17,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793323057] [2020-08-18 12:15:17,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:17,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 12:15:17,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805508690] [2020-08-18 12:15:17,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 12:15:17,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:17,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 12:15:17,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 12:15:17,654 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-18 12:15:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:18,375 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-18 12:15:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 12:15:18,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-18 12:15:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:18,378 INFO L225 Difference]: With dead ends: 407 [2020-08-18 12:15:18,378 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 12:15:18,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:15:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 12:15:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-18 12:15:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 12:15:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-18 12:15:18,390 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-18 12:15:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:18,390 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-18 12:15:18,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 12:15:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-18 12:15:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 12:15:18,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:18,392 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:18,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 12:15:18,392 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-18 12:15:18,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:18,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034930309] [2020-08-18 12:15:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:18,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:18,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 12:15:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:18,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:15:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:18,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034930309] [2020-08-18 12:15:18,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:18,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 12:15:18,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425430413] [2020-08-18 12:15:18,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 12:15:18,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:18,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 12:15:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 12:15:18,597 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-18 12:15:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:19,522 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-18 12:15:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 12:15:19,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-18 12:15:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:19,526 INFO L225 Difference]: With dead ends: 430 [2020-08-18 12:15:19,527 INFO L226 Difference]: Without dead ends: 380 [2020-08-18 12:15:19,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:15:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-18 12:15:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-18 12:15:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 12:15:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-18 12:15:19,539 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-18 12:15:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:19,539 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-18 12:15:19,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 12:15:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-18 12:15:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 12:15:19,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:19,541 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:19,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 12:15:19,542 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:19,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-18 12:15:19,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:19,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433566700] [2020-08-18 12:15:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:19,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:19,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 12:15:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:19,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:15:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:19,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433566700] [2020-08-18 12:15:19,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:19,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 12:15:19,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303503366] [2020-08-18 12:15:19,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 12:15:19,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 12:15:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:15:19,789 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-18 12:15:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:20,668 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-18 12:15:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 12:15:20,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-18 12:15:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:20,672 INFO L225 Difference]: With dead ends: 453 [2020-08-18 12:15:20,672 INFO L226 Difference]: Without dead ends: 403 [2020-08-18 12:15:20,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:15:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-18 12:15:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-18 12:15:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 12:15:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-18 12:15:20,682 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-18 12:15:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:20,682 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-18 12:15:20,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 12:15:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-18 12:15:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 12:15:20,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:20,683 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:20,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 12:15:20,684 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-18 12:15:20,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:20,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727867029] [2020-08-18 12:15:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:20,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:20,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 12:15:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 12:15:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:20,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727867029] [2020-08-18 12:15:20,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:20,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 12:15:20,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277046825] [2020-08-18 12:15:20,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 12:15:20,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:20,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 12:15:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:15:20,929 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-18 12:15:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:21,812 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-18 12:15:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 12:15:21,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-18 12:15:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:21,818 INFO L225 Difference]: With dead ends: 476 [2020-08-18 12:15:21,819 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 12:15:21,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:15:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 12:15:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-18 12:15:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 12:15:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-18 12:15:21,832 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-18 12:15:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:21,832 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-18 12:15:21,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 12:15:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-18 12:15:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 12:15:21,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:21,834 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:21,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 12:15:21,834 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-18 12:15:21,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:21,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773095588] [2020-08-18 12:15:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:22,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 12:15:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:22,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 12:15:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:22,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773095588] [2020-08-18 12:15:22,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:22,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 12:15:22,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7083707] [2020-08-18 12:15:22,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 12:15:22,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:22,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 12:15:22,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:15:22,134 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-18 12:15:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:23,315 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-18 12:15:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 12:15:23,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-18 12:15:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:23,318 INFO L225 Difference]: With dead ends: 499 [2020-08-18 12:15:23,319 INFO L226 Difference]: Without dead ends: 449 [2020-08-18 12:15:23,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-18 12:15:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-18 12:15:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-18 12:15:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 12:15:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-18 12:15:23,333 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-18 12:15:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:23,334 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-18 12:15:23,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 12:15:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-18 12:15:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 12:15:23,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:23,335 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:23,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 12:15:23,335 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-18 12:15:23,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:23,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070434788] [2020-08-18 12:15:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:23,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:23,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 12:15:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:23,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 12:15:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:23,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070434788] [2020-08-18 12:15:23,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:23,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 12:15:23,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187943259] [2020-08-18 12:15:23,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 12:15:23,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 12:15:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:15:23,630 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-18 12:15:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:24,851 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-18 12:15:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 12:15:24,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-18 12:15:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:24,857 INFO L225 Difference]: With dead ends: 522 [2020-08-18 12:15:24,857 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 12:15:24,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-18 12:15:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 12:15:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-18 12:15:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 12:15:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-18 12:15:24,870 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-18 12:15:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:24,871 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-18 12:15:24,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 12:15:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-18 12:15:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 12:15:24,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:24,873 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:24,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 12:15:24,874 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-18 12:15:24,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:24,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209000674] [2020-08-18 12:15:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:25,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:15:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:25,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 12:15:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:25,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209000674] [2020-08-18 12:15:25,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:25,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 12:15:25,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700809516] [2020-08-18 12:15:25,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 12:15:25,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 12:15:25,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 12:15:25,193 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-18 12:15:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:26,509 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-18 12:15:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 12:15:26,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-18 12:15:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:26,516 INFO L225 Difference]: With dead ends: 545 [2020-08-18 12:15:26,516 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 12:15:26,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:15:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 12:15:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-18 12:15:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 12:15:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-18 12:15:26,535 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-18 12:15:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:26,536 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-18 12:15:26,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 12:15:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-18 12:15:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 12:15:26,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:26,537 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:26,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 12:15:26,537 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:26,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-18 12:15:26,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:26,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473372664] [2020-08-18 12:15:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:26,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:26,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 12:15:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:26,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 12:15:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:26,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473372664] [2020-08-18 12:15:26,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:26,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 12:15:26,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087675487] [2020-08-18 12:15:26,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 12:15:26,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 12:15:26,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 12:15:26,908 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-18 12:15:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:28,061 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-18 12:15:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 12:15:28,061 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-18 12:15:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:28,065 INFO L225 Difference]: With dead ends: 568 [2020-08-18 12:15:28,065 INFO L226 Difference]: Without dead ends: 518 [2020-08-18 12:15:28,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:15:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-18 12:15:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-18 12:15:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 12:15:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-18 12:15:28,076 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-18 12:15:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:28,076 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-18 12:15:28,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 12:15:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-18 12:15:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 12:15:28,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:28,077 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:28,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 12:15:28,077 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-18 12:15:28,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:28,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26842356] [2020-08-18 12:15:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:28,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:28,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 12:15:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:28,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:15:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:28,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26842356] [2020-08-18 12:15:28,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 12:15:28,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727769365] [2020-08-18 12:15:28,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 12:15:28,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 12:15:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:15:28,401 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-18 12:15:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:29,728 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-18 12:15:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 12:15:29,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 12:15:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:29,732 INFO L225 Difference]: With dead ends: 591 [2020-08-18 12:15:29,732 INFO L226 Difference]: Without dead ends: 541 [2020-08-18 12:15:29,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-18 12:15:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-18 12:15:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-18 12:15:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 12:15:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-18 12:15:29,743 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-18 12:15:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:29,744 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-18 12:15:29,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 12:15:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-18 12:15:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 12:15:29,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:29,745 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:29,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 12:15:29,745 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-18 12:15:29,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:29,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783406889] [2020-08-18 12:15:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:30,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:30,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 12:15:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:30,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 12:15:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:30,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783406889] [2020-08-18 12:15:30,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:30,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 12:15:30,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347792102] [2020-08-18 12:15:30,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 12:15:30,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 12:15:30,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 12:15:30,201 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-18 12:15:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:31,634 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-18 12:15:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 12:15:31,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-18 12:15:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:31,637 INFO L225 Difference]: With dead ends: 614 [2020-08-18 12:15:31,637 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 12:15:31,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-18 12:15:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 12:15:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-18 12:15:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 12:15:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-18 12:15:31,648 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-18 12:15:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:31,649 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-18 12:15:31,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 12:15:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-18 12:15:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 12:15:31,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:31,650 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:31,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 12:15:31,650 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:31,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-18 12:15:31,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:31,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439356382] [2020-08-18 12:15:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:32,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:32,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 12:15:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:32,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 12:15:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:32,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439356382] [2020-08-18 12:15:32,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:32,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 12:15:32,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705954162] [2020-08-18 12:15:32,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 12:15:32,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:32,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 12:15:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 12:15:32,080 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-18 12:15:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:33,740 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-18 12:15:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 12:15:33,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-18 12:15:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:33,743 INFO L225 Difference]: With dead ends: 637 [2020-08-18 12:15:33,743 INFO L226 Difference]: Without dead ends: 587 [2020-08-18 12:15:33,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-18 12:15:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-18 12:15:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-18 12:15:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 12:15:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-18 12:15:33,754 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-18 12:15:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:33,754 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-18 12:15:33,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 12:15:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-18 12:15:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 12:15:33,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:33,756 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:33,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 12:15:33,756 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-18 12:15:33,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:33,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098154206] [2020-08-18 12:15:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:34,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:34,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 12:15:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 12:15:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:34,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098154206] [2020-08-18 12:15:34,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:34,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 12:15:34,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737538664] [2020-08-18 12:15:34,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 12:15:34,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 12:15:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 12:15:34,204 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-18 12:15:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:35,974 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-18 12:15:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 12:15:35,974 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 12:15:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:35,977 INFO L225 Difference]: With dead ends: 660 [2020-08-18 12:15:35,977 INFO L226 Difference]: Without dead ends: 610 [2020-08-18 12:15:35,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:15:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-18 12:15:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-18 12:15:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 12:15:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-18 12:15:35,987 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-18 12:15:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:35,988 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-18 12:15:35,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 12:15:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-18 12:15:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 12:15:35,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:35,989 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:35,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 12:15:35,989 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-18 12:15:35,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:35,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96729001] [2020-08-18 12:15:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:36,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:36,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:15:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 12:15:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:36,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96729001] [2020-08-18 12:15:36,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:36,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 12:15:36,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861811915] [2020-08-18 12:15:36,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 12:15:36,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 12:15:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 12:15:36,457 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-18 12:15:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:38,531 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-18 12:15:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 12:15:38,532 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-18 12:15:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:38,538 INFO L225 Difference]: With dead ends: 683 [2020-08-18 12:15:38,539 INFO L226 Difference]: Without dead ends: 633 [2020-08-18 12:15:38,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-18 12:15:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-18 12:15:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-18 12:15:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 12:15:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-18 12:15:38,559 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-18 12:15:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:38,560 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-18 12:15:38,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 12:15:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-18 12:15:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 12:15:38,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:38,562 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:38,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 12:15:38,562 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-18 12:15:38,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:38,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578732193] [2020-08-18 12:15:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:39,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:39,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 12:15:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:39,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 12:15:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578732193] [2020-08-18 12:15:39,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:39,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 12:15:39,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034782173] [2020-08-18 12:15:39,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 12:15:39,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 12:15:39,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-18 12:15:39,217 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-18 12:15:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:41,885 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-18 12:15:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 12:15:41,886 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-18 12:15:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:41,891 INFO L225 Difference]: With dead ends: 706 [2020-08-18 12:15:41,892 INFO L226 Difference]: Without dead ends: 656 [2020-08-18 12:15:41,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-18 12:15:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-18 12:15:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-18 12:15:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 12:15:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-18 12:15:41,910 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-18 12:15:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:41,911 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-18 12:15:41,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 12:15:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-18 12:15:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 12:15:41,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:41,913 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:41,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 12:15:41,914 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-18 12:15:41,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:41,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132535607] [2020-08-18 12:15:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:42,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 12:15:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 12:15:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:42,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132535607] [2020-08-18 12:15:42,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:42,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 12:15:42,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127940578] [2020-08-18 12:15:42,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 12:15:42,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 12:15:42,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 12:15:42,460 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-18 12:15:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:44,616 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-18 12:15:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 12:15:44,616 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-18 12:15:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:44,619 INFO L225 Difference]: With dead ends: 729 [2020-08-18 12:15:44,620 INFO L226 Difference]: Without dead ends: 679 [2020-08-18 12:15:44,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 12:15:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-18 12:15:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-18 12:15:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 12:15:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-18 12:15:44,630 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-18 12:15:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:44,631 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-18 12:15:44,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 12:15:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-18 12:15:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 12:15:44,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:44,632 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:44,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 12:15:44,633 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-18 12:15:44,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:44,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288815185] [2020-08-18 12:15:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:45,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:45,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 12:15:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:45,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 12:15:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:15:45,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288815185] [2020-08-18 12:15:45,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:45,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 12:15:45,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458373548] [2020-08-18 12:15:45,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 12:15:45,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 12:15:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-18 12:15:45,192 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-18 12:15:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:46,948 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-18 12:15:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 12:15:46,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-18 12:15:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:46,951 INFO L225 Difference]: With dead ends: 752 [2020-08-18 12:15:46,951 INFO L226 Difference]: Without dead ends: 702 [2020-08-18 12:15:46,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 12:15:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-18 12:15:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-18 12:15:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 12:15:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-18 12:15:46,963 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-18 12:15:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:46,964 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-18 12:15:46,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 12:15:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-18 12:15:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 12:15:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:46,965 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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, 1, 1, 1, 1, 1] [2020-08-18 12:15:46,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 12:15:46,965 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-18 12:15:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:46,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811975831] [2020-08-18 12:15:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 12:15:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 12:15:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 12:15:47,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811975831] [2020-08-18 12:15:47,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:47,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:15:47,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611052075] [2020-08-18 12:15:47,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:15:47,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:47,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:15:47,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:15:47,023 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-18 12:15:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:47,174 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-18 12:15:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:15:47,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-18 12:15:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:47,176 INFO L225 Difference]: With dead ends: 177 [2020-08-18 12:15:47,176 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 12:15:47,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:15:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 12:15:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-18 12:15:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 12:15:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-18 12:15:47,181 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-18 12:15:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:47,181 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-18 12:15:47,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:15:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-18 12:15:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 12:15:47,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:47,183 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:47,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 12:15:47,184 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-18 12:15:47,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:47,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678514708] [2020-08-18 12:15:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 12:15:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 12:15:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 12:15:47,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678514708] [2020-08-18 12:15:47,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:15:47,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:15:47,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660403246] [2020-08-18 12:15:47,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:15:47,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:47,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:15:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:15:47,251 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-18 12:15:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:47,430 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-18 12:15:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:15:47,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-18 12:15:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:47,432 INFO L225 Difference]: With dead ends: 200 [2020-08-18 12:15:47,433 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 12:15:47,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:15:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 12:15:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-18 12:15:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 12:15:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-18 12:15:47,439 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-18 12:15:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:47,439 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-18 12:15:47,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:15:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-18 12:15:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 12:15:47,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:47,441 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:47,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 12:15:47,442 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-18 12:15:47,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:47,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341644018] [2020-08-18 12:15:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 12:15:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 12:15:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 12:15:47,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341644018] [2020-08-18 12:15:47,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:47,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:15:47,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415308937] [2020-08-18 12:15:47,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:15:47,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:15:47,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:15:47,545 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-18 12:15:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:47,693 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-18 12:15:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:15:47,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-18 12:15:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:47,695 INFO L225 Difference]: With dead ends: 187 [2020-08-18 12:15:47,695 INFO L226 Difference]: Without dead ends: 139 [2020-08-18 12:15:47,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:15:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-18 12:15:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-18 12:15:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 12:15:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-18 12:15:47,706 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-18 12:15:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:47,706 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-18 12:15:47,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:15:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-18 12:15:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 12:15:47,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:15:47,708 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:15:47,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 12:15:47,708 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:15:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:15:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-18 12:15:47,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:15:47,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191189534] [2020-08-18 12:15:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:15:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:15:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 12:15:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 12:15:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:15:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 12:15:47,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191189534] [2020-08-18 12:15:47,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:15:47,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:15:47,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689609354] [2020-08-18 12:15:47,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:15:47,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:15:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:15:47,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:15:47,829 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-18 12:15:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:15:47,975 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-18 12:15:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:15:47,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 12:15:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:15:47,977 INFO L225 Difference]: With dead ends: 157 [2020-08-18 12:15:47,977 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 12:15:47,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:15:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 12:15:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 12:15:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 12:15:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 12:15:47,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-18 12:15:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:15:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 12:15:47,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:15:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 12:15:47,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 12:15:47,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 12:15:47,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 12:15:48,251 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 12:15:48,251 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 12:15:48,251 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-18 12:15:48,251 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-18 12:15:48,251 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-18 12:15:48,252 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-18 12:15:48,252 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-18 12:15:48,252 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:15:48,252 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 12:15:48,252 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:15:48,253 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-18 12:15:48,253 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-18 12:15:48,253 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-18 12:15:48,253 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 12:15:48,253 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 12:15:48,253 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 12:15:48,254 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 12:15:48,254 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-18 12:15:48,254 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-18 12:15:48,254 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-18 12:15:48,254 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-18 12:15:48,254 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 12:15:48,255 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-18 12:15:48,255 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 12:15:48,255 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-18 12:15:48,255 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-18 12:15:48,255 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 12:15:48,255 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-18 12:15:48,255 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-18 12:15:48,255 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-18 12:15:48,256 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-18 12:15:48,256 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-18 12:15:48,256 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-18 12:15:48,256 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-18 12:15:48,256 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-18 12:15:48,256 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-18 12:15:48,256 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-18 12:15:48,257 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-18 12:15:48,257 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-18 12:15:48,257 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-18 12:15:48,257 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-18 12:15:48,257 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-18 12:15:48,257 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 12:15:48,257 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-18 12:15:48,257 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 12:15:48,258 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-18 12:15:48,258 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-18 12:15:48,258 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-18 12:15:48,258 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-18 12:15:48,258 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 12:15:48,258 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-18 12:15:48,258 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-18 12:15:48,259 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-18 12:15:48,259 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-18 12:15:48,259 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-18 12:15:48,259 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-18 12:15:48,259 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-18 12:15:48,259 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-18 12:15:48,260 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-18 12:15:48,260 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-18 12:15:48,260 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-18 12:15:48,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:15:48 BoogieIcfgContainer [2020-08-18 12:15:48,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:15:48,289 INFO L168 Benchmark]: Toolchain (without parser) took 40293.74 ms. Allocated memory was 145.8 MB in the beginning and 477.6 MB in the end (delta: 331.9 MB). Free memory was 100.9 MB in the beginning and 231.0 MB in the end (delta: -130.1 MB). Peak memory consumption was 201.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:48,289 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 119.1 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:15:48,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.00 ms. Allocated memory is still 145.8 MB. Free memory was 100.7 MB in the beginning and 89.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:48,290 INFO L168 Benchmark]: Boogie Preprocessor took 131.97 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 89.7 MB in the beginning and 179.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:48,291 INFO L168 Benchmark]: RCFGBuilder took 461.55 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 155.7 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:48,291 INFO L168 Benchmark]: TraceAbstraction took 39412.46 ms. Allocated memory was 202.4 MB in the beginning and 477.6 MB in the end (delta: 275.3 MB). Free memory was 155.7 MB in the beginning and 231.0 MB in the end (delta: -75.4 MB). Peak memory consumption was 199.9 MB. Max. memory is 7.1 GB. [2020-08-18 12:15:48,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 119.1 MB in the beginning and 118.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.00 ms. Allocated memory is still 145.8 MB. Free memory was 100.7 MB in the beginning and 89.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.97 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 89.7 MB in the beginning and 179.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.55 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 155.7 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39412.46 ms. Allocated memory was 202.4 MB in the beginning and 477.6 MB in the end (delta: 275.3 MB). Free memory was 155.7 MB in the beginning and 231.0 MB in the end (delta: -75.4 MB). Peak memory consumption was 199.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.0s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 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...