/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 21:28:49,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:28:49,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:28:49,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:28:49,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:28:49,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:28:49,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:28:49,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:28:49,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:28:49,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:28:49,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:28:49,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:28:49,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:28:49,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:28:49,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:28:49,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:28:49,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:28:49,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:28:49,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:28:49,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:28:49,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:28:49,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:28:49,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:28:49,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:28:49,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:28:49,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:28:49,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:28:49,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:28:49,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:28:49,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 21:28:49,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:28:49,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:28:49,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:28:49,198 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 [2020-08-21 21:28:49,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:28:49,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:28:49,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:28:49,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:28:49,222 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:28:49,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:28:49,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:28:49,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:28:49,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:28:49,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:28:49,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:28:49,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:28:49,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:28:49,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:28:49,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:28:49,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:28:49,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:28:49,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:28:49,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:28:49,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:28:49,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:28:49,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:28:49,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:28:49,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:28:49,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:28:49,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:28:49,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:28:49,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:28:49,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:28:49,227 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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:28:49,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:28:49,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:28:49,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:28:49,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:28:49,578 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:28:49,579 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 21:28:49,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96957e796/85a7d73e44ef40248cfccf09c1c333a9/FLAGc05f02ce6 [2020-08-21 21:28:50,095 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:28:50,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 21:28:50,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96957e796/85a7d73e44ef40248cfccf09c1c333a9/FLAGc05f02ce6 [2020-08-21 21:28:50,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96957e796/85a7d73e44ef40248cfccf09c1c333a9 [2020-08-21 21:28:50,485 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:28:50,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:28:50,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:28:50,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:28:50,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:28:50,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a529ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50, skipping insertion in model container [2020-08-21 21:28:50,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:28:50,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:28:50,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:28:50,723 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:28:50,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:28:50,856 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:28:50,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50 WrapperNode [2020-08-21 21:28:50,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:28:50,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:28:50,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:28:50,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:28:50,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (1/1) ... [2020-08-21 21:28:50,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:28:50,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:28:50,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:28:50,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:28:50,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (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 [2020-08-21 21:28:50,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:28:50,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:28:50,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:28:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-21 21:28:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-21 21:28:50,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:28:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:28:50,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:28:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:28:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-21 21:28:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:28:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-21 21:28:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:28:50,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:28:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:28:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:28:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:28:50,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:28:51,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:28:51,370 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-21 21:28:51,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:28:51 BoogieIcfgContainer [2020-08-21 21:28:51,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:28:51,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:28:51,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:28:51,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:28:51,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:28:50" (1/3) ... [2020-08-21 21:28:51,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e358957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:28:51, skipping insertion in model container [2020-08-21 21:28:51,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:28:50" (2/3) ... [2020-08-21 21:28:51,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e358957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:28:51, skipping insertion in model container [2020-08-21 21:28:51,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:28:51" (3/3) ... [2020-08-21 21:28:51,384 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-21 21:28:51,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:28:51,404 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:28:51,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:28:51,445 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:28:51,445 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:28:51,445 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:28:51,446 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:28:51,446 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:28:51,446 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:28:51,446 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:28:51,447 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:28:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 21:28:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 21:28:51,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:51,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:28:51,479 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-21 21:28:51,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:51,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566388923] [2020-08-21 21:28:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:51,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:51,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566388923] [2020-08-21 21:28:51,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:28:51,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:28:51,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621957813] [2020-08-21 21:28:51,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:28:51,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:51,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:28:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:28:51,743 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 21:28:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:52,102 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-21 21:28:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:28:52,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 21:28:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:52,116 INFO L225 Difference]: With dead ends: 150 [2020-08-21 21:28:52,116 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 21:28:52,121 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 [2020-08-21 21:28:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 21:28:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-21 21:28:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 21:28:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-21 21:28:52,179 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-21 21:28:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:52,180 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-21 21:28:52,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:28:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-21 21:28:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 21:28:52,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:52,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:28:52,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:28:52,182 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-21 21:28:52,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:52,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329324339] [2020-08-21 21:28:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:52,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:52,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329324339] [2020-08-21 21:28:52,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:52,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 21:28:52,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292650654] [2020-08-21 21:28:52,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:28:52,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:28:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:28:52,276 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-21 21:28:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:52,638 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-21 21:28:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:28:52,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 21:28:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:52,641 INFO L225 Difference]: With dead ends: 170 [2020-08-21 21:28:52,641 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 21:28:52,645 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 [2020-08-21 21:28:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 21:28:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-21 21:28:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 21:28:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-21 21:28:52,669 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-21 21:28:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:52,669 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-21 21:28:52,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:28:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-21 21:28:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:28:52,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:52,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:28:52,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:28:52,671 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:52,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-21 21:28:52,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:52,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149948996] [2020-08-21 21:28:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:52,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:52,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149948996] [2020-08-21 21:28:52,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:52,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:28:52,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773455814] [2020-08-21 21:28:52,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:28:52,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:28:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:28:52,755 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-21 21:28:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:53,057 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-21 21:28:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:28:53,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 21:28:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:53,061 INFO L225 Difference]: With dead ends: 203 [2020-08-21 21:28:53,061 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 21:28:53,062 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 [2020-08-21 21:28:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 21:28:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-21 21:28:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 21:28:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-21 21:28:53,076 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-21 21:28:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:53,076 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-21 21:28:53,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:28:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-21 21:28:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:28:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:53,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:28:53,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:28:53,078 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-21 21:28:53,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:53,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811279742] [2020-08-21 21:28:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:53,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811279742] [2020-08-21 21:28:53,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:53,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:28:53,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488616471] [2020-08-21 21:28:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:28:53,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:28:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:28:53,153 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-21 21:28:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:53,551 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-21 21:28:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:28:53,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 21:28:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:53,554 INFO L225 Difference]: With dead ends: 236 [2020-08-21 21:28:53,554 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 21:28:53,555 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 [2020-08-21 21:28:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 21:28:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-21 21:28:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 21:28:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-21 21:28:53,567 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-21 21:28:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:53,568 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-21 21:28:53,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:28:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-21 21:28:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:28:53,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:53,569 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:28:53,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:28:53,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:53,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:53,570 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-21 21:28:53,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:53,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054256004] [2020-08-21 21:28:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 21:28:53,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054256004] [2020-08-21 21:28:53,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:28:53,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:28:53,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706944905] [2020-08-21 21:28:53,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:28:53,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:28:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:28:53,674 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-21 21:28:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:53,805 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-21 21:28:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:28:53,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 21:28:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:53,806 INFO L225 Difference]: With dead ends: 116 [2020-08-21 21:28:53,807 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 21:28:53,808 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 [2020-08-21 21:28:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 21:28:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-21 21:28:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 21:28:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-21 21:28:53,817 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-21 21:28:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:53,817 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-21 21:28:53,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:28:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-21 21:28:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 21:28:53,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:53,819 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] [2020-08-21 21:28:53,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:28:53,820 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-21 21:28:53,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:53,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671056893] [2020-08-21 21:28:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 21:28:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 21:28:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:53,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671056893] [2020-08-21 21:28:53,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:53,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:28:53,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755170456] [2020-08-21 21:28:53,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:28:53,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:53,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:28:53,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:28:53,921 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-21 21:28:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:54,336 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-21 21:28:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:28:54,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 21:28:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:54,342 INFO L225 Difference]: With dead ends: 223 [2020-08-21 21:28:54,343 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 21:28:54,344 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 [2020-08-21 21:28:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 21:28:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-21 21:28:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 21:28:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-21 21:28:54,366 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-21 21:28:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:54,369 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-21 21:28:54,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:28:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-21 21:28:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 21:28:54,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:54,372 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] [2020-08-21 21:28:54,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:28:54,372 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-21 21:28:54,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:54,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970720266] [2020-08-21 21:28:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:54,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:54,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:28:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:54,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 21:28:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:54,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970720266] [2020-08-21 21:28:54,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:54,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:28:54,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323687200] [2020-08-21 21:28:54,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:28:54,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:28:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:28:54,532 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-21 21:28:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:54,968 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-21 21:28:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:28:54,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 21:28:54,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:54,971 INFO L225 Difference]: With dead ends: 246 [2020-08-21 21:28:54,972 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 21:28:54,973 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 [2020-08-21 21:28:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 21:28:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-21 21:28:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 21:28:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-21 21:28:54,984 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-21 21:28:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:54,984 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-21 21:28:54,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:28:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-21 21:28:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 21:28:54,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:54,986 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] [2020-08-21 21:28:54,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:28:54,987 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:54,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-21 21:28:54,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:54,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150553301] [2020-08-21 21:28:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 21:28:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:28:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:55,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150553301] [2020-08-21 21:28:55,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:55,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 21:28:55,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798216166] [2020-08-21 21:28:55,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:28:55,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:55,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:28:55,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:28:55,091 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-21 21:28:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:55,584 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-21 21:28:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:28:55,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 21:28:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:55,587 INFO L225 Difference]: With dead ends: 269 [2020-08-21 21:28:55,587 INFO L226 Difference]: Without dead ends: 219 [2020-08-21 21:28:55,590 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 [2020-08-21 21:28:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-21 21:28:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-21 21:28:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 21:28:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-21 21:28:55,611 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-21 21:28:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:55,612 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-21 21:28:55,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:28:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-21 21:28:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 21:28:55,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:55,617 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] [2020-08-21 21:28:55,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:28:55,617 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-21 21:28:55,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:55,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979907766] [2020-08-21 21:28:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 21:28:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 21:28:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:55,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979907766] [2020-08-21 21:28:55,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:55,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:28:55,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238273937] [2020-08-21 21:28:55,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:28:55,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:55,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:28:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:28:55,758 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-21 21:28:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:56,249 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-21 21:28:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:28:56,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-21 21:28:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:56,253 INFO L225 Difference]: With dead ends: 292 [2020-08-21 21:28:56,253 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 21:28:56,254 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 [2020-08-21 21:28:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 21:28:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-21 21:28:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 21:28:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-21 21:28:56,265 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-21 21:28:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:56,265 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-21 21:28:56,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:28:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-21 21:28:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 21:28:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:56,267 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] [2020-08-21 21:28:56,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:28:56,267 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-21 21:28:56,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:56,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669124780] [2020-08-21 21:28:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:56,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 21:28:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:28:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:56,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669124780] [2020-08-21 21:28:56,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:56,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:28:56,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689642754] [2020-08-21 21:28:56,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:28:56,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:28:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:28:56,425 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-21 21:28:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:57,074 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-21 21:28:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:28:57,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-21 21:28:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:57,078 INFO L225 Difference]: With dead ends: 315 [2020-08-21 21:28:57,078 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 21:28:57,079 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 [2020-08-21 21:28:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 21:28:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-21 21:28:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 21:28:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-21 21:28:57,095 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-21 21:28:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:57,096 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-21 21:28:57,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:28:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-21 21:28:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 21:28:57,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:57,099 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] [2020-08-21 21:28:57,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:28:57,100 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-21 21:28:57,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:57,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330674472] [2020-08-21 21:28:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:57,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:57,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 21:28:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:57,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:28:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:57,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330674472] [2020-08-21 21:28:57,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:57,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 21:28:57,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132752535] [2020-08-21 21:28:57,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:28:57,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:28:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:28:57,294 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-21 21:28:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:57,936 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-21 21:28:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:28:57,936 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-21 21:28:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:57,940 INFO L225 Difference]: With dead ends: 338 [2020-08-21 21:28:57,940 INFO L226 Difference]: Without dead ends: 288 [2020-08-21 21:28:57,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:28:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-21 21:28:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-21 21:28:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 21:28:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-21 21:28:57,950 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-21 21:28:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:57,951 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-21 21:28:57,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:28:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-21 21:28:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:28:57,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:57,952 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] [2020-08-21 21:28:57,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:28:57,952 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-21 21:28:57,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:57,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987314053] [2020-08-21 21:28:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:58,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:58,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:28:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:58,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 21:28:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:58,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987314053] [2020-08-21 21:28:58,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:58,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 21:28:58,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135063859] [2020-08-21 21:28:58,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:28:58,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:28:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:28:58,154 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-21 21:28:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:58,888 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-21 21:28:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 21:28:58,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 21:28:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:58,891 INFO L225 Difference]: With dead ends: 361 [2020-08-21 21:28:58,891 INFO L226 Difference]: Without dead ends: 311 [2020-08-21 21:28:58,892 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 [2020-08-21 21:28:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-21 21:28:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-21 21:28:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 21:28:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-21 21:28:58,901 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-21 21:28:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:58,902 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-21 21:28:58,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:28:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-21 21:28:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 21:28:58,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:58,903 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] [2020-08-21 21:28:58,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:28:58,904 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-21 21:28:58,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:58,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055289298] [2020-08-21 21:28:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:59,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:28:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:59,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 21:28:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:28:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:28:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:28:59,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055289298] [2020-08-21 21:28:59,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:28:59,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 21:28:59,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719035433] [2020-08-21 21:28:59,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 21:28:59,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:28:59,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 21:28:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:28:59,072 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-21 21:28:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:59,899 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-21 21:28:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 21:28:59,899 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-21 21:28:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:59,903 INFO L225 Difference]: With dead ends: 384 [2020-08-21 21:28:59,903 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 21:28:59,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:28:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 21:28:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-21 21:28:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 21:28:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-21 21:28:59,920 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-21 21:28:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:59,921 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-21 21:28:59,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 21:28:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-21 21:28:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:28:59,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:28:59,924 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] [2020-08-21 21:28:59,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:28:59,924 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:28:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:28:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-21 21:28:59,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:28:59,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343252257] [2020-08-21 21:28:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:28:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:00,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:29:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:00,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 21:29:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:00,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343252257] [2020-08-21 21:29:00,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:00,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 21:29:00,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625210310] [2020-08-21 21:29:00,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 21:29:00,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 21:29:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:29:00,171 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-21 21:29:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:00,907 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-21 21:29:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:29:00,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-21 21:29:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:00,911 INFO L225 Difference]: With dead ends: 407 [2020-08-21 21:29:00,912 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 21:29:00,913 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 [2020-08-21 21:29:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 21:29:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-21 21:29:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 21:29:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-21 21:29:00,927 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-21 21:29:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:00,928 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-21 21:29:00,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 21:29:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-21 21:29:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 21:29:00,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:00,929 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] [2020-08-21 21:29:00,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:29:00,930 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-21 21:29:00,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:00,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318993849] [2020-08-21 21:29:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:01,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:01,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:29:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:01,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:29:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:01,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318993849] [2020-08-21 21:29:01,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:01,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 21:29:01,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050353281] [2020-08-21 21:29:01,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 21:29:01,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 21:29:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:29:01,221 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-21 21:29:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:02,078 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-21 21:29:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 21:29:02,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-21 21:29:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:02,081 INFO L225 Difference]: With dead ends: 430 [2020-08-21 21:29:02,081 INFO L226 Difference]: Without dead ends: 380 [2020-08-21 21:29:02,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:29:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-21 21:29:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-21 21:29:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 21:29:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-21 21:29:02,091 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-21 21:29:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:02,091 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-21 21:29:02,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 21:29:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-21 21:29:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 21:29:02,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:02,093 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] [2020-08-21 21:29:02,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:29:02,093 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-21 21:29:02,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:02,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313957870] [2020-08-21 21:29:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:02,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 21:29:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:02,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 21:29:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:02,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313957870] [2020-08-21 21:29:02,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:02,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 21:29:02,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833364743] [2020-08-21 21:29:02,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 21:29:02,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 21:29:02,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 21:29:02,292 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-21 21:29:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:03,161 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-21 21:29:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 21:29:03,162 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-21 21:29:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:03,164 INFO L225 Difference]: With dead ends: 453 [2020-08-21 21:29:03,165 INFO L226 Difference]: Without dead ends: 403 [2020-08-21 21:29:03,166 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 [2020-08-21 21:29:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-21 21:29:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-21 21:29:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 21:29:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-21 21:29:03,181 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-21 21:29:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:03,183 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-21 21:29:03,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 21:29:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-21 21:29:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 21:29:03,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:03,185 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] [2020-08-21 21:29:03,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:29:03,186 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-21 21:29:03,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:03,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912902280] [2020-08-21 21:29:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:03,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:03,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:29:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:03,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 21:29:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:03,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912902280] [2020-08-21 21:29:03,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:03,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 21:29:03,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250859341] [2020-08-21 21:29:03,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 21:29:03,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 21:29:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:29:03,423 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-21 21:29:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:04,283 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-21 21:29:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 21:29:04,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-21 21:29:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:04,286 INFO L225 Difference]: With dead ends: 476 [2020-08-21 21:29:04,286 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 21:29:04,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:29:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 21:29:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-21 21:29:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 21:29:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-21 21:29:04,300 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-21 21:29:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:04,300 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-21 21:29:04,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 21:29:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-21 21:29:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 21:29:04,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:04,301 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] [2020-08-21 21:29:04,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 21:29:04,301 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-21 21:29:04,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:04,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930940036] [2020-08-21 21:29:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:04,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 21:29:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:04,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 21:29:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:04,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930940036] [2020-08-21 21:29:04,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:04,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 21:29:04,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485854620] [2020-08-21 21:29:04,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 21:29:04,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 21:29:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 21:29:04,562 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-21 21:29:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:05,714 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-21 21:29:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 21:29:05,715 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-21 21:29:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:05,721 INFO L225 Difference]: With dead ends: 499 [2020-08-21 21:29:05,722 INFO L226 Difference]: Without dead ends: 449 [2020-08-21 21:29:05,723 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 [2020-08-21 21:29:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-21 21:29:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-21 21:29:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 21:29:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-21 21:29:05,738 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-21 21:29:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:05,738 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-21 21:29:05,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 21:29:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-21 21:29:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 21:29:05,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:05,740 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] [2020-08-21 21:29:05,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 21:29:05,740 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-21 21:29:05,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:05,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292428084] [2020-08-21 21:29:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:06,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:06,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:29:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:06,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 21:29:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:06,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292428084] [2020-08-21 21:29:06,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:06,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 21:29:06,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294715853] [2020-08-21 21:29:06,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 21:29:06,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:06,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 21:29:06,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:29:06,049 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-21 21:29:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:07,331 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-21 21:29:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 21:29:07,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-21 21:29:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:07,335 INFO L225 Difference]: With dead ends: 522 [2020-08-21 21:29:07,335 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 21:29:07,336 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 [2020-08-21 21:29:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 21:29:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-21 21:29:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 21:29:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-21 21:29:07,348 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-21 21:29:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:07,348 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-21 21:29:07,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 21:29:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-21 21:29:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 21:29:07,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:07,350 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] [2020-08-21 21:29:07,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 21:29:07,350 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-21 21:29:07,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:07,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553023766] [2020-08-21 21:29:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:07,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:07,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 21:29:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:07,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 21:29:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:07,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553023766] [2020-08-21 21:29:07,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:07,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 21:29:07,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028935785] [2020-08-21 21:29:07,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 21:29:07,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 21:29:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 21:29:07,660 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-21 21:29:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:08,936 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-21 21:29:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 21:29:08,936 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-21 21:29:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:08,939 INFO L225 Difference]: With dead ends: 545 [2020-08-21 21:29:08,939 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 21:29:08,940 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 [2020-08-21 21:29:08,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 21:29:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-21 21:29:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 21:29:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-21 21:29:08,950 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-21 21:29:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:08,951 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-21 21:29:08,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 21:29:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-21 21:29:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 21:29:08,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:08,952 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] [2020-08-21 21:29:08,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 21:29:08,952 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-21 21:29:08,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:08,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729508671] [2020-08-21 21:29:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:09,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 21:29:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:09,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 21:29:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:09,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729508671] [2020-08-21 21:29:09,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:09,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 21:29:09,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869826725] [2020-08-21 21:29:09,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 21:29:09,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 21:29:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 21:29:09,277 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-21 21:29:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:10,445 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-21 21:29:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 21:29:10,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-21 21:29:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:10,449 INFO L225 Difference]: With dead ends: 568 [2020-08-21 21:29:10,449 INFO L226 Difference]: Without dead ends: 518 [2020-08-21 21:29:10,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-21 21:29:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-21 21:29:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-21 21:29:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-21 21:29:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-21 21:29:10,461 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-21 21:29:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:10,461 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-21 21:29:10,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 21:29:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-21 21:29:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 21:29:10,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:10,463 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] [2020-08-21 21:29:10,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 21:29:10,463 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:10,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-21 21:29:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:10,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824187448] [2020-08-21 21:29:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:10,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:10,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 21:29:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:10,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 21:29:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:10,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824187448] [2020-08-21 21:29:10,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:10,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 21:29:10,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451857037] [2020-08-21 21:29:10,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 21:29:10,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 21:29:10,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 21:29:10,867 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-21 21:29:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:12,039 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-21 21:29:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 21:29:12,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 21:29:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:12,044 INFO L225 Difference]: With dead ends: 591 [2020-08-21 21:29:12,044 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 21:29:12,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:29:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 21:29:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-21 21:29:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 21:29:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-21 21:29:12,057 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-21 21:29:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:12,057 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-21 21:29:12,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 21:29:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-21 21:29:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 21:29:12,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:12,058 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] [2020-08-21 21:29:12,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 21:29:12,058 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-21 21:29:12,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:12,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156974908] [2020-08-21 21:29:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:12,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 21:29:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:12,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 21:29:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:12,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156974908] [2020-08-21 21:29:12,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:12,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 21:29:12,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826228289] [2020-08-21 21:29:12,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 21:29:12,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:12,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 21:29:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 21:29:12,541 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-21 21:29:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:14,012 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-21 21:29:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 21:29:14,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-21 21:29:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:14,018 INFO L225 Difference]: With dead ends: 614 [2020-08-21 21:29:14,018 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 21:29:14,019 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 [2020-08-21 21:29:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 21:29:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-21 21:29:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 21:29:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-21 21:29:14,030 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-21 21:29:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:14,030 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-21 21:29:14,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 21:29:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-21 21:29:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 21:29:14,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:14,031 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] [2020-08-21 21:29:14,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 21:29:14,032 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-21 21:29:14,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:14,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286327167] [2020-08-21 21:29:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:14,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:14,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 21:29:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:14,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:14,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286327167] [2020-08-21 21:29:14,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:14,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 21:29:14,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565959035] [2020-08-21 21:29:14,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 21:29:14,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 21:29:14,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:29:14,445 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-21 21:29:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:16,074 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-21 21:29:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 21:29:16,075 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-21 21:29:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:16,078 INFO L225 Difference]: With dead ends: 637 [2020-08-21 21:29:16,078 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 21:29:16,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-21 21:29:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 21:29:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-21 21:29:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 21:29:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-21 21:29:16,091 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-21 21:29:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:16,092 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-21 21:29:16,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 21:29:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-21 21:29:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 21:29:16,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:16,093 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] [2020-08-21 21:29:16,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 21:29:16,093 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-21 21:29:16,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:16,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748395202] [2020-08-21 21:29:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:16,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:16,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 21:29:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:16,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 21:29:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:16,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748395202] [2020-08-21 21:29:16,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:16,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 21:29:16,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585595048] [2020-08-21 21:29:16,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 21:29:16,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 21:29:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 21:29:16,481 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-21 21:29:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:18,342 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-21 21:29:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 21:29:18,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 21:29:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:18,347 INFO L225 Difference]: With dead ends: 660 [2020-08-21 21:29:18,347 INFO L226 Difference]: Without dead ends: 610 [2020-08-21 21:29:18,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-21 21:29:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-21 21:29:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-21 21:29:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 21:29:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-21 21:29:18,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-21 21:29:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:18,367 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-21 21:29:18,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 21:29:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-21 21:29:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 21:29:18,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:18,368 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] [2020-08-21 21:29:18,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 21:29:18,369 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-21 21:29:18,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:18,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600338595] [2020-08-21 21:29:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:18,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:18,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 21:29:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:18,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 21:29:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:18,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600338595] [2020-08-21 21:29:18,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:18,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 21:29:18,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602781442] [2020-08-21 21:29:18,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 21:29:18,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 21:29:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 21:29:18,880 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-21 21:29:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:20,917 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-21 21:29:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 21:29:20,917 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-21 21:29:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:20,923 INFO L225 Difference]: With dead ends: 683 [2020-08-21 21:29:20,923 INFO L226 Difference]: Without dead ends: 633 [2020-08-21 21:29:20,925 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 [2020-08-21 21:29:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-21 21:29:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-21 21:29:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 21:29:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-21 21:29:20,945 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-21 21:29:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:20,946 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-21 21:29:20,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 21:29:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-21 21:29:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 21:29:20,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:20,948 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] [2020-08-21 21:29:20,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 21:29:20,949 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-21 21:29:20,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:20,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047913621] [2020-08-21 21:29:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:21,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 21:29:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:21,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 21:29:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:21,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047913621] [2020-08-21 21:29:21,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:21,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 21:29:21,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292285156] [2020-08-21 21:29:21,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 21:29:21,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:21,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 21:29:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 21:29:21,652 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-21 21:29:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:24,413 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-21 21:29:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 21:29:24,414 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-21 21:29:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:24,420 INFO L225 Difference]: With dead ends: 706 [2020-08-21 21:29:24,420 INFO L226 Difference]: Without dead ends: 656 [2020-08-21 21:29:24,423 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 [2020-08-21 21:29:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-21 21:29:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-21 21:29:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 21:29:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-21 21:29:24,456 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-21 21:29:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:24,457 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-21 21:29:24,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 21:29:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-21 21:29:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 21:29:24,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:24,459 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] [2020-08-21 21:29:24,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 21:29:24,460 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-21 21:29:24,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:24,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032408637] [2020-08-21 21:29:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:24,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:29:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:24,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 21:29:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:25,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032408637] [2020-08-21 21:29:25,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:25,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 21:29:25,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186512144] [2020-08-21 21:29:25,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 21:29:25,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:25,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 21:29:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 21:29:25,003 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-21 21:29:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:27,122 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-21 21:29:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 21:29:27,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-21 21:29:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:27,125 INFO L225 Difference]: With dead ends: 729 [2020-08-21 21:29:27,125 INFO L226 Difference]: Without dead ends: 679 [2020-08-21 21:29:27,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 21:29:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-21 21:29:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-21 21:29:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 21:29:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-21 21:29:27,137 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-21 21:29:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:27,137 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-21 21:29:27,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 21:29:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-21 21:29:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 21:29:27,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:27,139 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] [2020-08-21 21:29:27,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 21:29:27,139 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-21 21:29:27,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:27,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110814131] [2020-08-21 21:29:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:27,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:27,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 21:29:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:27,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 21:29:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:27,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110814131] [2020-08-21 21:29:27,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:27,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 21:29:27,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51007936] [2020-08-21 21:29:27,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 21:29:27,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 21:29:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 21:29:27,740 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-21 21:29:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:29,578 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-21 21:29:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 21:29:29,579 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-21 21:29:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:29,581 INFO L225 Difference]: With dead ends: 752 [2020-08-21 21:29:29,582 INFO L226 Difference]: Without dead ends: 702 [2020-08-21 21:29:29,582 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 [2020-08-21 21:29:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-21 21:29:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-21 21:29:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 21:29:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-21 21:29:29,594 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-21 21:29:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:29,594 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-21 21:29:29,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 21:29:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-21 21:29:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 21:29:29,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:29,595 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] [2020-08-21 21:29:29,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 21:29:29,596 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-21 21:29:29,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:29,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23619850] [2020-08-21 21:29:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 21:29:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 21:29:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 21:29:29,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23619850] [2020-08-21 21:29:29,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:29,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:29:29,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166979246] [2020-08-21 21:29:29,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:29:29,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:29:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:29,666 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-21 21:29:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:29,822 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-21 21:29:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:29:29,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-21 21:29:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:29,823 INFO L225 Difference]: With dead ends: 177 [2020-08-21 21:29:29,823 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 21:29:29,824 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 [2020-08-21 21:29:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 21:29:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-21 21:29:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 21:29:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-21 21:29:29,830 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-21 21:29:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:29,830 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-21 21:29:29,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:29:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-21 21:29:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 21:29:29,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:29,831 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] [2020-08-21 21:29:29,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 21:29:29,832 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:29,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-21 21:29:29,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:29,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490482879] [2020-08-21 21:29:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 21:29:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 21:29:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 21:29:29,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490482879] [2020-08-21 21:29:29,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:29,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:29:29,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583557345] [2020-08-21 21:29:29,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:29:29,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:29:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:29,911 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-21 21:29:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:30,091 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-21 21:29:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:30,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-21 21:29:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:30,093 INFO L225 Difference]: With dead ends: 200 [2020-08-21 21:29:30,093 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 21:29:30,094 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 [2020-08-21 21:29:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 21:29:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-21 21:29:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 21:29:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-21 21:29:30,100 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-21 21:29:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:30,100 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-21 21:29:30,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:29:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-21 21:29:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 21:29:30,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:30,101 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] [2020-08-21 21:29:30,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 21:29:30,102 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:30,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-21 21:29:30,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:30,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241790415] [2020-08-21 21:29:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 21:29:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 21:29:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 21:29:30,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241790415] [2020-08-21 21:29:30,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:30,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:29:30,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784385889] [2020-08-21 21:29:30,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:29:30,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:29:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:30,194 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-21 21:29:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:30,343 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-21 21:29:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:30,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-21 21:29:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:30,345 INFO L225 Difference]: With dead ends: 187 [2020-08-21 21:29:30,345 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 21:29:30,346 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 [2020-08-21 21:29:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 21:29:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-21 21:29:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 21:29:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-21 21:29:30,351 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-21 21:29:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:30,352 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-21 21:29:30,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:29:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-21 21:29:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 21:29:30,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:30,353 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] [2020-08-21 21:29:30,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 21:29:30,353 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-21 21:29:30,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:30,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557633131] [2020-08-21 21:29:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 21:29:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 21:29:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 21:29:30,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557633131] [2020-08-21 21:29:30,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:30,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:29:30,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105723968] [2020-08-21 21:29:30,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:30,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:30,493 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-21 21:29:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:30,656 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-21 21:29:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:29:30,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-21 21:29:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:30,657 INFO L225 Difference]: With dead ends: 157 [2020-08-21 21:29:30,657 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:29:30,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:29:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:29:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:29:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:29:30,659 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-21 21:29:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:30,659 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:29:30,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:30,660 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:29:30,660 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:29:30,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 21:29:30,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:29:30,902 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 21:29:30,903 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 21:29:30,903 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-21 21:29:30,903 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-21 21:29:30,903 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-21 21:29:30,904 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|)) [2020-08-21 21:29:30,904 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-21 21:29:30,904 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:29:30,904 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|)) [2020-08-21 21:29:30,904 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:29:30,905 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-21 21:29:30,905 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-21 21:29:30,905 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-21 21:29:30,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:29:30,905 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 21:29:30,906 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:29:30,906 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:29:30,906 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-21 21:29:30,906 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-21 21:29:30,906 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-21 21:29:30,906 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-21 21:29:30,907 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 21:29:30,907 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-21 21:29:30,907 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 21:29:30,907 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-21 21:29:30,907 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-21 21:29:30,908 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 21:29:30,908 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-21 21:29:30,908 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-21 21:29:30,908 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-21 21:29:30,908 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-21 21:29:30,908 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-21 21:29:30,908 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-21 21:29:30,908 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-21 21:29:30,909 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-21 21:29:30,909 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-21 21:29:30,909 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-21 21:29:30,909 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-21 21:29:30,909 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-21 21:29:30,909 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-21 21:29:30,909 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-21 21:29:30,910 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-21 21:29:30,910 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 21:29:30,910 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-21 21:29:30,910 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 21:29:30,910 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-21 21:29:30,910 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-21 21:29:30,910 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-21 21:29:30,911 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-21 21:29:30,911 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 21:29:30,911 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-21 21:29:30,911 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-21 21:29:30,911 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-21 21:29:30,911 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-21 21:29:30,911 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-21 21:29:30,912 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-21 21:29:30,912 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-21 21:29:30,912 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-21 21:29:30,912 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-21 21:29:30,912 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-21 21:29:30,912 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-21 21:29:30,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:29:30 BoogieIcfgContainer [2020-08-21 21:29:30,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:29:30,941 INFO L168 Benchmark]: Toolchain (without parser) took 40453.02 ms. Allocated memory was 140.5 MB in the beginning and 453.5 MB in the end (delta: 313.0 MB). Free memory was 103.4 MB in the beginning and 351.9 MB in the end (delta: -248.5 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:30,941 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:29:30,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.12 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 182.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:30,942 INFO L168 Benchmark]: Boogie Preprocessor took 49.28 ms. Allocated memory is still 203.9 MB. Free memory was 181.8 MB in the beginning and 179.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:30,943 INFO L168 Benchmark]: RCFGBuilder took 468.64 ms. Allocated memory is still 203.9 MB. Free memory was 179.8 MB in the beginning and 155.9 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:30,943 INFO L168 Benchmark]: TraceAbstraction took 39561.08 ms. Allocated memory was 203.9 MB in the beginning and 453.5 MB in the end (delta: 249.6 MB). Free memory was 155.9 MB in the beginning and 351.9 MB in the end (delta: -196.0 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:30,945 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 369.12 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 182.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.28 ms. Allocated memory is still 203.9 MB. Free memory was 181.8 MB in the beginning and 179.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 468.64 ms. Allocated memory is still 203.9 MB. Free memory was 179.8 MB in the beginning and 155.9 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39561.08 ms. Allocated memory was 203.9 MB in the beginning and 453.5 MB in the end (delta: 249.6 MB). Free memory was 155.9 MB in the beginning and 351.9 MB in the end (delta: -196.0 MB). Peak memory consumption was 53.6 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: 39.2s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.1s, 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, 20.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.8s 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, 7.2s 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...