/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:32:54,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:32:54,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:32:54,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:32:54,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:32:54,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:32:54,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:32:54,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:32:54,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:32:54,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:32:54,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:32:54,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:32:54,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:32:54,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:32:54,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:32:54,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:32:54,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:32:54,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:32:54,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:32:54,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:32:54,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:32:54,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:32:54,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:32:54,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:32:54,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:32:54,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:32:54,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:32:54,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:32:54,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:32:54,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 01:32:54,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:32:54,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:32:54,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:32:54,313 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 [2020-08-22 01:32:54,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:32:54,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:32:54,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:32:54,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:32:54,362 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:32:54,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:32:54,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:32:54,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:32:54,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:32:54,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:32:54,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:32:54,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:32:54,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:32:54,367 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:32:54,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:32:54,367 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:32:54,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:32:54,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:32:54,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:32:54,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:32:54,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:32:54,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:32:54,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:32:54,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:32:54,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:32:54,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:32:54,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:32:54,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:32:54,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:32:54,372 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:32:54,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:32:54,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:32:54,702 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:32:54,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:32:54,704 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:32:54,705 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 01:32:54,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f26595d88/67d15fec5ca94ec2b55f18e4c1144269/FLAG07e7f9d57 [2020-08-22 01:32:55,163 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:32:55,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 01:32:55,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f26595d88/67d15fec5ca94ec2b55f18e4c1144269/FLAG07e7f9d57 [2020-08-22 01:32:55,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f26595d88/67d15fec5ca94ec2b55f18e4c1144269 [2020-08-22 01:32:55,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:32:55,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:32:55,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:55,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:32:55,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:32:55,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcababa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55, skipping insertion in model container [2020-08-22 01:32:55,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:32:55,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:32:55,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:55,805 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:32:55,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:55,844 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:32:55,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55 WrapperNode [2020-08-22 01:32:55,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:55,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:32:55,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:32:55,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:32:55,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (1/1) ... [2020-08-22 01:32:55,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:32:55,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:32:55,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:32:55,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:32:55,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (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 [2020-08-22 01:32:56,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:32:56,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:32:56,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:32:56,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:32:56,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:32:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:32:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:32:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:32:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:32:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:32:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:32:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:32:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:32:56,234 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:32:56,234 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 01:32:56,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:56 BoogieIcfgContainer [2020-08-22 01:32:56,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:32:56,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:32:56,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:32:56,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:32:56,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:32:55" (1/3) ... [2020-08-22 01:32:56,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ce2433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:56, skipping insertion in model container [2020-08-22 01:32:56,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:55" (2/3) ... [2020-08-22 01:32:56,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ce2433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:56, skipping insertion in model container [2020-08-22 01:32:56,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:56" (3/3) ... [2020-08-22 01:32:56,247 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-08-22 01:32:56,261 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:32:56,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:32:56,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:32:56,321 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:32:56,321 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:32:56,321 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:32:56,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:32:56,322 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:32:56,322 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:32:56,322 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:32:56,322 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:32:56,350 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-22 01:32:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 01:32:56,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:56,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:56,364 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-08-22 01:32:56,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:56,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992713376] [2020-08-22 01:32:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:56,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992713376] [2020-08-22 01:32:56,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:56,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:32:56,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419514942] [2020-08-22 01:32:56,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:32:56,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:56,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:32:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:32:56,614 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-08-22 01:32:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:56,682 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-08-22 01:32:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:32:56,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-22 01:32:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:56,694 INFO L225 Difference]: With dead ends: 34 [2020-08-22 01:32:56,694 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 01:32:56,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:32:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 01:32:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 01:32:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 01:32:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-22 01:32:56,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-22 01:32:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:56,745 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-22 01:32:56,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:32:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-22 01:32:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 01:32:56,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:56,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:56,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:32:56,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-08-22 01:32:56,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:56,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293082388] [2020-08-22 01:32:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:56,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293082388] [2020-08-22 01:32:56,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:56,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:32:56,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744959992] [2020-08-22 01:32:56,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:32:56,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:32:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:32:56,836 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-08-22 01:32:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:56,887 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-08-22 01:32:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:32:56,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-22 01:32:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:56,889 INFO L225 Difference]: With dead ends: 22 [2020-08-22 01:32:56,890 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 01:32:56,892 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 [2020-08-22 01:32:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 01:32:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-22 01:32:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 01:32:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 01:32:56,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-08-22 01:32:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:56,904 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 01:32:56,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:32:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 01:32:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:32:56,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:56,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:56,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:32:56,907 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-08-22 01:32:56,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:56,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752029055] [2020-08-22 01:32:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:56,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752029055] [2020-08-22 01:32:56,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:56,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:32:56,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79785669] [2020-08-22 01:32:56,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:56,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:56,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:56,998 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-22 01:32:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,050 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-08-22 01:32:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:32:57,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 01:32:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,052 INFO L225 Difference]: With dead ends: 24 [2020-08-22 01:32:57,053 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 01:32:57,053 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 [2020-08-22 01:32:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 01:32:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-08-22 01:32:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 01:32:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 01:32:57,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-08-22 01:32:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,060 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 01:32:57,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 01:32:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 01:32:57,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:32:57,062 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-08-22 01:32:57,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310070641] [2020-08-22 01:32:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:57,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310070641] [2020-08-22 01:32:57,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:57,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:32:57,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454469948] [2020-08-22 01:32:57,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:32:57,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:57,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:32:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:57,159 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-08-22 01:32:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,209 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-08-22 01:32:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:32:57,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 01:32:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,211 INFO L225 Difference]: With dead ends: 26 [2020-08-22 01:32:57,211 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 01:32:57,212 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 [2020-08-22 01:32:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 01:32:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-08-22 01:32:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 01:32:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-22 01:32:57,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-08-22 01:32:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,218 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-22 01:32:57,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:32:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-22 01:32:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:32:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:32:57,221 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-08-22 01:32:57,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960568640] [2020-08-22 01:32:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:57,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960568640] [2020-08-22 01:32:57,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:57,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:32:57,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056659785] [2020-08-22 01:32:57,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:32:57,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:57,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:32:57,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:57,307 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-08-22 01:32:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,376 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-08-22 01:32:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:32:57,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-08-22 01:32:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,379 INFO L225 Difference]: With dead ends: 28 [2020-08-22 01:32:57,379 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 01:32:57,380 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 [2020-08-22 01:32:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 01:32:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-22 01:32:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 01:32:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 01:32:57,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-08-22 01:32:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,386 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 01:32:57,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:32:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 01:32:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:32:57,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,388 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:32:57,389 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-08-22 01:32:57,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827467975] [2020-08-22 01:32:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:57,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827467975] [2020-08-22 01:32:57,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:57,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:32:57,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889982688] [2020-08-22 01:32:57,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:32:57,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:57,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:32:57,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:32:57,531 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-08-22 01:32:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,588 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-22 01:32:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:32:57,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-22 01:32:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,589 INFO L225 Difference]: With dead ends: 30 [2020-08-22 01:32:57,590 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 01:32:57,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:32:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 01:32:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-22 01:32:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 01:32:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 01:32:57,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-08-22 01:32:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,597 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 01:32:57,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:32:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 01:32:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:32:57,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,598 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:32:57,598 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-08-22 01:32:57,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057629447] [2020-08-22 01:32:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:57,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057629447] [2020-08-22 01:32:57,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:57,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:32:57,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663652588] [2020-08-22 01:32:57,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:32:57,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:32:57,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:57,692 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-08-22 01:32:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,750 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-08-22 01:32:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:32:57,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-22 01:32:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,751 INFO L225 Difference]: With dead ends: 32 [2020-08-22 01:32:57,752 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 01:32:57,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 01:32:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-22 01:32:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 01:32:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-08-22 01:32:57,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-08-22 01:32:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,759 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-08-22 01:32:57,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:32:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-08-22 01:32:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:32:57,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,760 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:32:57,760 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-08-22 01:32:57,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923452980] [2020-08-22 01:32:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:57,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923452980] [2020-08-22 01:32:57,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:57,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:32:57,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601977084] [2020-08-22 01:32:57,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:32:57,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:32:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:32:57,874 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-08-22 01:32:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:57,939 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-22 01:32:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:32:57,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-08-22 01:32:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:57,940 INFO L225 Difference]: With dead ends: 34 [2020-08-22 01:32:57,940 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 01:32:57,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:32:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 01:32:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-22 01:32:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 01:32:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 01:32:57,946 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-08-22 01:32:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:57,947 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 01:32:57,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:32:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 01:32:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 01:32:57,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:57,948 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:57,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:32:57,949 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-08-22 01:32:57,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:57,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182191016] [2020-08-22 01:32:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:58,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182191016] [2020-08-22 01:32:58,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:58,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:32:58,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199788] [2020-08-22 01:32:58,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:32:58,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:58,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:32:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:58,059 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-08-22 01:32:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:58,125 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-22 01:32:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:32:58,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-08-22 01:32:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:58,127 INFO L225 Difference]: With dead ends: 36 [2020-08-22 01:32:58,127 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 01:32:58,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 01:32:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 01:32:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 01:32:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-08-22 01:32:58,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-08-22 01:32:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:58,133 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-08-22 01:32:58,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:32:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-08-22 01:32:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:32:58,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:58,135 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:58,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:32:58,135 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:58,136 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-08-22 01:32:58,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:58,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938790571] [2020-08-22 01:32:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:58,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938790571] [2020-08-22 01:32:58,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:58,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:32:58,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103298051] [2020-08-22 01:32:58,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:32:58,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:58,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:32:58,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:32:58,260 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-08-22 01:32:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:58,354 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-08-22 01:32:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:32:58,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-08-22 01:32:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:58,356 INFO L225 Difference]: With dead ends: 38 [2020-08-22 01:32:58,356 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 01:32:58,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:32:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 01:32:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 01:32:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 01:32:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-08-22 01:32:58,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-08-22 01:32:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:58,363 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-08-22 01:32:58,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:32:58,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-08-22 01:32:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:32:58,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:58,364 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:58,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:32:58,365 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-08-22 01:32:58,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:58,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314976366] [2020-08-22 01:32:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:58,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314976366] [2020-08-22 01:32:58,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:58,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:32:58,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894496503] [2020-08-22 01:32:58,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:32:58,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:32:58,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:32:58,511 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-08-22 01:32:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:58,584 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-08-22 01:32:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:32:58,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 01:32:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:58,585 INFO L225 Difference]: With dead ends: 40 [2020-08-22 01:32:58,586 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 01:32:58,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:32:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 01:32:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 01:32:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 01:32:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-22 01:32:58,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-08-22 01:32:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:58,592 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-22 01:32:58,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:32:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-22 01:32:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 01:32:58,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:58,593 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:58,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:32:58,594 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-08-22 01:32:58,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:58,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089137159] [2020-08-22 01:32:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:58,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089137159] [2020-08-22 01:32:58,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:58,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:32:58,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48593348] [2020-08-22 01:32:58,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:32:58,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:58,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:32:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:32:58,748 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-08-22 01:32:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:58,809 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-08-22 01:32:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:32:58,810 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-08-22 01:32:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:58,811 INFO L225 Difference]: With dead ends: 42 [2020-08-22 01:32:58,811 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 01:32:58,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:32:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 01:32:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 01:32:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 01:32:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-08-22 01:32:58,816 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-08-22 01:32:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:58,817 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-08-22 01:32:58,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:32:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-08-22 01:32:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 01:32:58,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:58,818 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:58,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:32:58,818 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-08-22 01:32:58,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:58,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482456718] [2020-08-22 01:32:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:58,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482456718] [2020-08-22 01:32:58,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:58,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:32:58,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449558211] [2020-08-22 01:32:58,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:32:58,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:32:58,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:32:58,963 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-08-22 01:32:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:59,043 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-22 01:32:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:32:59,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-08-22 01:32:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:59,044 INFO L225 Difference]: With dead ends: 44 [2020-08-22 01:32:59,044 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 01:32:59,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:32:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 01:32:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 01:32:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 01:32:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 01:32:59,053 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-08-22 01:32:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:59,053 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 01:32:59,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:32:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 01:32:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 01:32:59,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:59,055 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:59,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:32:59,055 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:59,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-08-22 01:32:59,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:59,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055811279] [2020-08-22 01:32:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:59,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055811279] [2020-08-22 01:32:59,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:59,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:32:59,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100630663] [2020-08-22 01:32:59,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:32:59,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:32:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:32:59,264 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-08-22 01:32:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:59,341 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-08-22 01:32:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:32:59,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-08-22 01:32:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:59,342 INFO L225 Difference]: With dead ends: 46 [2020-08-22 01:32:59,342 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 01:32:59,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:32:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 01:32:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 01:32:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:32:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-08-22 01:32:59,347 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-08-22 01:32:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:59,348 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-08-22 01:32:59,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:32:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-08-22 01:32:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 01:32:59,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:59,349 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:59,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:32:59,349 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-08-22 01:32:59,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:59,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874108488] [2020-08-22 01:32:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:59,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874108488] [2020-08-22 01:32:59,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:59,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:32:59,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050523992] [2020-08-22 01:32:59,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:32:59,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:59,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:32:59,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:32:59,529 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-08-22 01:32:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:59,631 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-08-22 01:32:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:32:59,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-08-22 01:32:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:59,633 INFO L225 Difference]: With dead ends: 48 [2020-08-22 01:32:59,633 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 01:32:59,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:32:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 01:32:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 01:32:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 01:32:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-08-22 01:32:59,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-08-22 01:32:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:59,649 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-08-22 01:32:59,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:32:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-08-22 01:32:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 01:32:59,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:59,650 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:59,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:32:59,651 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:59,651 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-08-22 01:32:59,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:59,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829822622] [2020-08-22 01:32:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:59,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829822622] [2020-08-22 01:32:59,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:59,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:32:59,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504447879] [2020-08-22 01:32:59,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:32:59,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:32:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:32:59,876 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-08-22 01:32:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:59,987 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-08-22 01:32:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:32:59,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-08-22 01:32:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:59,989 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:32:59,989 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 01:32:59,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:32:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 01:32:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 01:32:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 01:32:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-22 01:32:59,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-08-22 01:32:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:59,996 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-22 01:32:59,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:32:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-22 01:32:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 01:32:59,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:59,997 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:59,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:32:59,998 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-08-22 01:32:59,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:59,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271364708] [2020-08-22 01:32:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:00,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271364708] [2020-08-22 01:33:00,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:00,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:33:00,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349607585] [2020-08-22 01:33:00,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:33:00,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:00,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:33:00,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:33:00,214 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-08-22 01:33:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:00,326 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-08-22 01:33:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:33:00,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-08-22 01:33:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:00,328 INFO L225 Difference]: With dead ends: 52 [2020-08-22 01:33:00,328 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:33:00,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:33:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:33:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 01:33:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:33:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-08-22 01:33:00,334 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-08-22 01:33:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:00,334 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-08-22 01:33:00,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:33:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-08-22 01:33:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 01:33:00,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:00,335 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:00,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:33:00,336 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-08-22 01:33:00,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:00,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691859259] [2020-08-22 01:33:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:00,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691859259] [2020-08-22 01:33:00,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:00,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:33:00,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122487304] [2020-08-22 01:33:00,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:33:00,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:00,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:33:00,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:33:00,579 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-08-22 01:33:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:00,684 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-08-22 01:33:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:33:00,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-08-22 01:33:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:00,685 INFO L225 Difference]: With dead ends: 54 [2020-08-22 01:33:00,686 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 01:33:00,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:33:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 01:33:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-22 01:33:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 01:33:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-08-22 01:33:00,698 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-08-22 01:33:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:00,698 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-08-22 01:33:00,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:33:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-08-22 01:33:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 01:33:00,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:00,701 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:00,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:33:00,702 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-08-22 01:33:00,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:00,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979167471] [2020-08-22 01:33:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:00,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979167471] [2020-08-22 01:33:00,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:00,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:33:00,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939923515] [2020-08-22 01:33:00,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:33:00,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:00,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:33:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:33:00,965 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-08-22 01:33:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:01,075 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-08-22 01:33:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:33:01,075 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-08-22 01:33:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:01,076 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:33:01,076 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 01:33:01,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:33:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 01:33:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-22 01:33:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 01:33:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-08-22 01:33:01,081 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-08-22 01:33:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:01,082 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-08-22 01:33:01,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:33:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-08-22 01:33:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 01:33:01,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:01,083 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:01,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:33:01,083 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-08-22 01:33:01,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:01,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009107691] [2020-08-22 01:33:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:01,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:01,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009107691] [2020-08-22 01:33:01,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:01,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:33:01,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827584051] [2020-08-22 01:33:01,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:33:01,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:33:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:33:01,366 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-08-22 01:33:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:01,449 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-08-22 01:33:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:33:01,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-08-22 01:33:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:01,450 INFO L225 Difference]: With dead ends: 58 [2020-08-22 01:33:01,450 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 01:33:01,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:33:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 01:33:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 01:33:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 01:33:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-08-22 01:33:01,455 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-08-22 01:33:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:01,456 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-08-22 01:33:01,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:33:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-08-22 01:33:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 01:33:01,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:01,457 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:01,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:33:01,457 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-08-22 01:33:01,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:01,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106145335] [2020-08-22 01:33:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:01,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:01,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106145335] [2020-08-22 01:33:01,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:01,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:33:01,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500857150] [2020-08-22 01:33:01,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:33:01,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:33:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:33:01,734 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-08-22 01:33:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:01,883 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-08-22 01:33:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:33:01,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-08-22 01:33:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:01,884 INFO L225 Difference]: With dead ends: 60 [2020-08-22 01:33:01,884 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:33:01,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:33:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:33:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-22 01:33:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 01:33:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-08-22 01:33:01,892 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-08-22 01:33:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:01,892 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-08-22 01:33:01,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:33:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-08-22 01:33:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 01:33:01,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:01,897 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:01,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:33:01,897 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-08-22 01:33:01,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:01,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611275637] [2020-08-22 01:33:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:02,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:02,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611275637] [2020-08-22 01:33:02,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:02,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:33:02,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912750279] [2020-08-22 01:33:02,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:33:02,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:33:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:33:02,240 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-08-22 01:33:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:02,332 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-08-22 01:33:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:33:02,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-08-22 01:33:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:02,336 INFO L225 Difference]: With dead ends: 62 [2020-08-22 01:33:02,336 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 01:33:02,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:33:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 01:33:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 01:33:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 01:33:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-08-22 01:33:02,341 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-08-22 01:33:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:02,341 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-08-22 01:33:02,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:33:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-08-22 01:33:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 01:33:02,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:02,342 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:02,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:33:02,342 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-08-22 01:33:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:02,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717053366] [2020-08-22 01:33:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:02,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:02,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717053366] [2020-08-22 01:33:02,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:02,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:33:02,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326020058] [2020-08-22 01:33:02,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:33:02,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:33:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:33:02,770 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-08-22 01:33:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:02,885 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-08-22 01:33:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:33:02,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-08-22 01:33:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:02,886 INFO L225 Difference]: With dead ends: 64 [2020-08-22 01:33:02,887 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 01:33:02,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:33:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 01:33:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 01:33:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:33:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-08-22 01:33:02,893 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-08-22 01:33:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:02,893 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-08-22 01:33:02,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:33:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-08-22 01:33:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:33:02,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:02,894 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:02,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:33:02,894 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-08-22 01:33:02,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:02,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174878106] [2020-08-22 01:33:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:03,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:03,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174878106] [2020-08-22 01:33:03,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:03,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:33:03,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047905353] [2020-08-22 01:33:03,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:33:03,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:33:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:33:03,243 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-08-22 01:33:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:03,401 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-08-22 01:33:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:33:03,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-08-22 01:33:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:03,402 INFO L225 Difference]: With dead ends: 66 [2020-08-22 01:33:03,402 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 01:33:03,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:33:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 01:33:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-22 01:33:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 01:33:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-22 01:33:03,407 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-08-22 01:33:03,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:03,407 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-22 01:33:03,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:33:03,407 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-22 01:33:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:33:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:03,412 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:03,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:33:03,413 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-08-22 01:33:03,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:03,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377413369] [2020-08-22 01:33:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:03,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:03,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377413369] [2020-08-22 01:33:03,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:03,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:33:03,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886090950] [2020-08-22 01:33:03,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:33:03,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:33:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:33:03,820 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-08-22 01:33:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:03,969 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-08-22 01:33:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:33:03,970 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-08-22 01:33:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:03,971 INFO L225 Difference]: With dead ends: 68 [2020-08-22 01:33:03,971 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 01:33:03,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:33:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 01:33:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 01:33:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 01:33:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-08-22 01:33:03,976 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-08-22 01:33:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:03,977 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-08-22 01:33:03,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:33:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-08-22 01:33:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 01:33:03,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:03,978 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:03,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:33:03,978 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:03,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-08-22 01:33:03,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:03,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737904412] [2020-08-22 01:33:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:04,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:04,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737904412] [2020-08-22 01:33:04,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:04,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:33:04,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197185113] [2020-08-22 01:33:04,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:33:04,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:33:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:33:04,415 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-08-22 01:33:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:04,590 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-22 01:33:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:33:04,590 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-08-22 01:33:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:04,591 INFO L225 Difference]: With dead ends: 70 [2020-08-22 01:33:04,591 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 01:33:04,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:33:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 01:33:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-22 01:33:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 01:33:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-08-22 01:33:04,598 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-08-22 01:33:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:04,598 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-08-22 01:33:04,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:33:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-08-22 01:33:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 01:33:04,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:04,599 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:04,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:33:04,600 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-08-22 01:33:04,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:04,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349537080] [2020-08-22 01:33:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:05,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:05,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349537080] [2020-08-22 01:33:05,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:05,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:33:05,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127508896] [2020-08-22 01:33:05,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:33:05,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:33:05,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:33:05,075 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-08-22 01:33:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:05,252 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-08-22 01:33:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 01:33:05,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-08-22 01:33:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:05,254 INFO L225 Difference]: With dead ends: 72 [2020-08-22 01:33:05,254 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 01:33:05,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:33:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 01:33:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-22 01:33:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 01:33:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-08-22 01:33:05,258 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-08-22 01:33:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:05,259 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-08-22 01:33:05,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:33:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-08-22 01:33:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 01:33:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:05,260 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:05,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:33:05,260 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-08-22 01:33:05,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:05,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023773294] [2020-08-22 01:33:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:05,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:05,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023773294] [2020-08-22 01:33:05,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:05,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 01:33:05,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202234699] [2020-08-22 01:33:05,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 01:33:05,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 01:33:05,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:33:05,737 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-08-22 01:33:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:05,911 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-08-22 01:33:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 01:33:05,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-08-22 01:33:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:05,913 INFO L225 Difference]: With dead ends: 74 [2020-08-22 01:33:05,913 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 01:33:05,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:33:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 01:33:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 01:33:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 01:33:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-08-22 01:33:05,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-08-22 01:33:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:05,918 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-08-22 01:33:05,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 01:33:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-08-22 01:33:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 01:33:05,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:05,918 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:05,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:33:05,919 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-08-22 01:33:05,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:05,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21309341] [2020-08-22 01:33:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:06,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:06,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21309341] [2020-08-22 01:33:06,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:06,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 01:33:06,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484804109] [2020-08-22 01:33:06,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 01:33:06,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 01:33:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:33:06,471 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-08-22 01:33:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:06,705 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-08-22 01:33:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 01:33:06,706 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-08-22 01:33:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:06,708 INFO L225 Difference]: With dead ends: 76 [2020-08-22 01:33:06,708 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 01:33:06,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:33:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 01:33:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 01:33:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:33:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-08-22 01:33:06,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-08-22 01:33:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:06,715 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-08-22 01:33:06,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 01:33:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-08-22 01:33:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 01:33:06,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:06,717 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:06,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:33:06,718 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-08-22 01:33:06,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:06,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321350751] [2020-08-22 01:33:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:07,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:07,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321350751] [2020-08-22 01:33:07,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:07,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 01:33:07,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15881880] [2020-08-22 01:33:07,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 01:33:07,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:07,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 01:33:07,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:33:07,442 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-08-22 01:33:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:07,705 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-08-22 01:33:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 01:33:07,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-08-22 01:33:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:07,707 INFO L225 Difference]: With dead ends: 78 [2020-08-22 01:33:07,707 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 01:33:07,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:33:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 01:33:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-22 01:33:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 01:33:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-08-22 01:33:07,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-08-22 01:33:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:07,715 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-08-22 01:33:07,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 01:33:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-08-22 01:33:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 01:33:07,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:07,718 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:07,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:33:07,718 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-08-22 01:33:07,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:07,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723820491] [2020-08-22 01:33:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:08,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:08,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723820491] [2020-08-22 01:33:08,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:08,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 01:33:08,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116740652] [2020-08-22 01:33:08,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 01:33:08,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 01:33:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:33:08,472 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-08-22 01:33:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:08,641 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-08-22 01:33:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 01:33:08,641 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-08-22 01:33:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:08,642 INFO L225 Difference]: With dead ends: 80 [2020-08-22 01:33:08,642 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 01:33:08,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:33:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 01:33:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-22 01:33:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 01:33:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-08-22 01:33:08,647 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-08-22 01:33:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:08,647 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-08-22 01:33:08,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 01:33:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-08-22 01:33:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:33:08,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:08,648 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:08,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:33:08,650 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:08,651 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-08-22 01:33:08,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:08,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536885435] [2020-08-22 01:33:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:09,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:09,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536885435] [2020-08-22 01:33:09,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:09,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 01:33:09,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543889001] [2020-08-22 01:33:09,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 01:33:09,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 01:33:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:33:09,267 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-08-22 01:33:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:09,454 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-08-22 01:33:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 01:33:09,454 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-08-22 01:33:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:09,456 INFO L225 Difference]: With dead ends: 82 [2020-08-22 01:33:09,456 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 01:33:09,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:33:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 01:33:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 01:33:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:33:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-08-22 01:33:09,461 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-08-22 01:33:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:09,461 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-08-22 01:33:09,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 01:33:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-08-22 01:33:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 01:33:09,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:09,463 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:09,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 01:33:09,463 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:09,463 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-08-22 01:33:09,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:09,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780434300] [2020-08-22 01:33:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:10,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780434300] [2020-08-22 01:33:10,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:10,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 01:33:10,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093069387] [2020-08-22 01:33:10,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 01:33:10,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 01:33:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:33:10,327 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-08-22 01:33:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:10,596 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-08-22 01:33:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 01:33:10,597 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-08-22 01:33:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:10,598 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:33:10,598 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:33:10,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:33:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:33:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-22 01:33:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 01:33:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-08-22 01:33:10,610 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-08-22 01:33:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:10,611 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-08-22 01:33:10,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 01:33:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-08-22 01:33:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 01:33:10,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:10,613 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:10,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 01:33:10,614 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:10,618 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-08-22 01:33:10,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:10,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253581537] [2020-08-22 01:33:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:11,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:11,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253581537] [2020-08-22 01:33:11,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:11,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 01:33:11,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123418302] [2020-08-22 01:33:11,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 01:33:11,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 01:33:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 01:33:11,355 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-08-22 01:33:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:11,528 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-08-22 01:33:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 01:33:11,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-08-22 01:33:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:11,531 INFO L225 Difference]: With dead ends: 86 [2020-08-22 01:33:11,531 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 01:33:11,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 01:33:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 01:33:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-22 01:33:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:33:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-08-22 01:33:11,537 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-08-22 01:33:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:11,537 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-08-22 01:33:11,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 01:33:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-08-22 01:33:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 01:33:11,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:11,538 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:11,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 01:33:11,539 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-08-22 01:33:11,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:11,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484749967] [2020-08-22 01:33:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:12,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484749967] [2020-08-22 01:33:12,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:12,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 01:33:12,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552386577] [2020-08-22 01:33:12,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 01:33:12,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 01:33:12,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:33:12,289 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-08-22 01:33:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:12,473 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-08-22 01:33:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 01:33:12,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-08-22 01:33:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:12,474 INFO L225 Difference]: With dead ends: 88 [2020-08-22 01:33:12,475 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 01:33:12,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:33:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 01:33:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-22 01:33:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:33:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-08-22 01:33:12,479 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-08-22 01:33:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:12,480 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-08-22 01:33:12,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 01:33:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-08-22 01:33:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 01:33:12,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:12,481 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:12,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 01:33:12,482 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-08-22 01:33:12,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:12,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321576946] [2020-08-22 01:33:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:13,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:13,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321576946] [2020-08-22 01:33:13,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:13,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 01:33:13,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860287075] [2020-08-22 01:33:13,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 01:33:13,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:13,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 01:33:13,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 01:33:13,270 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-08-22 01:33:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:13,454 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-08-22 01:33:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 01:33:13,455 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-08-22 01:33:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:13,456 INFO L225 Difference]: With dead ends: 90 [2020-08-22 01:33:13,456 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 01:33:13,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 01:33:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 01:33:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-22 01:33:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:33:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-08-22 01:33:13,461 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-08-22 01:33:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:13,461 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-08-22 01:33:13,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 01:33:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-08-22 01:33:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 01:33:13,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:13,462 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:13,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 01:33:13,462 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-08-22 01:33:13,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:13,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198277085] [2020-08-22 01:33:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:14,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:14,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198277085] [2020-08-22 01:33:14,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:14,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 01:33:14,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724387663] [2020-08-22 01:33:14,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 01:33:14,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 01:33:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:33:14,236 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-08-22 01:33:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:14,363 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-08-22 01:33:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 01:33:14,363 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-08-22 01:33:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:14,364 INFO L225 Difference]: With dead ends: 92 [2020-08-22 01:33:14,364 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 01:33:14,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:33:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 01:33:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 01:33:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 01:33:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-08-22 01:33:14,369 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-08-22 01:33:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:14,369 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-08-22 01:33:14,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 01:33:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-08-22 01:33:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 01:33:14,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:14,370 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:14,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 01:33:14,370 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-08-22 01:33:14,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:14,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590655300] [2020-08-22 01:33:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:15,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:15,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590655300] [2020-08-22 01:33:15,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:15,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 01:33:15,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311199497] [2020-08-22 01:33:15,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 01:33:15,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 01:33:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 01:33:15,358 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-08-22 01:33:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:15,600 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-08-22 01:33:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 01:33:15,600 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-08-22 01:33:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:15,602 INFO L225 Difference]: With dead ends: 94 [2020-08-22 01:33:15,602 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 01:33:15,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 01:33:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 01:33:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-22 01:33:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 01:33:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-08-22 01:33:15,607 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-08-22 01:33:15,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:15,608 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-08-22 01:33:15,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 01:33:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-08-22 01:33:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:33:15,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:15,609 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:15,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 01:33:15,609 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:15,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-08-22 01:33:15,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:15,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051118940] [2020-08-22 01:33:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:16,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:16,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051118940] [2020-08-22 01:33:16,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:16,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 01:33:16,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028181186] [2020-08-22 01:33:16,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 01:33:16,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:16,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 01:33:16,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:33:16,489 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-08-22 01:33:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:16,741 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-08-22 01:33:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 01:33:16,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-08-22 01:33:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:16,743 INFO L225 Difference]: With dead ends: 96 [2020-08-22 01:33:16,743 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 01:33:16,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:33:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 01:33:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-22 01:33:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 01:33:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-08-22 01:33:16,750 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-08-22 01:33:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:16,751 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-08-22 01:33:16,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 01:33:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-08-22 01:33:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 01:33:16,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:16,752 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:16,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 01:33:16,752 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-08-22 01:33:16,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:16,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262021253] [2020-08-22 01:33:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:17,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:17,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262021253] [2020-08-22 01:33:17,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:17,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 01:33:17,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484398313] [2020-08-22 01:33:17,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 01:33:17,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 01:33:17,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 01:33:17,663 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-08-22 01:33:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:17,961 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-08-22 01:33:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 01:33:17,961 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-08-22 01:33:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:17,962 INFO L225 Difference]: With dead ends: 98 [2020-08-22 01:33:17,963 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 01:33:17,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 01:33:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 01:33:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-22 01:33:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 01:33:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-08-22 01:33:17,969 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-08-22 01:33:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:17,969 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-08-22 01:33:17,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 01:33:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-08-22 01:33:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 01:33:17,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:17,970 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:17,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 01:33:17,971 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-08-22 01:33:17,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:17,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646648144] [2020-08-22 01:33:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:18,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:18,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646648144] [2020-08-22 01:33:18,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:18,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 01:33:18,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147984473] [2020-08-22 01:33:18,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 01:33:18,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 01:33:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:33:18,944 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-08-22 01:33:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:19,202 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-08-22 01:33:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 01:33:19,203 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-08-22 01:33:19,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:19,204 INFO L225 Difference]: With dead ends: 100 [2020-08-22 01:33:19,204 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 01:33:19,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:33:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 01:33:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-22 01:33:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 01:33:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-08-22 01:33:19,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-08-22 01:33:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:19,213 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-08-22 01:33:19,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 01:33:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-08-22 01:33:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 01:33:19,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:19,214 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:19,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 01:33:19,215 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-08-22 01:33:19,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:19,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77943205] [2020-08-22 01:33:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:20,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77943205] [2020-08-22 01:33:20,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:20,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 01:33:20,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356118330] [2020-08-22 01:33:20,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 01:33:20,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 01:33:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:33:20,212 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-08-22 01:33:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:20,406 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-08-22 01:33:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 01:33:20,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-08-22 01:33:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:20,408 INFO L225 Difference]: With dead ends: 102 [2020-08-22 01:33:20,408 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 01:33:20,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:33:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 01:33:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 01:33:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 01:33:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-08-22 01:33:20,414 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-08-22 01:33:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:20,414 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-08-22 01:33:20,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 01:33:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-08-22 01:33:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 01:33:20,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:20,416 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:20,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 01:33:20,416 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-08-22 01:33:20,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:20,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333771584] [2020-08-22 01:33:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:21,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:21,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333771584] [2020-08-22 01:33:21,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:21,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 01:33:21,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275148350] [2020-08-22 01:33:21,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 01:33:21,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 01:33:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 01:33:21,482 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-08-22 01:33:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:21,732 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-08-22 01:33:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 01:33:21,733 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-08-22 01:33:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:21,734 INFO L225 Difference]: With dead ends: 104 [2020-08-22 01:33:21,735 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 01:33:21,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 01:33:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 01:33:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-22 01:33:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 01:33:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-22 01:33:21,740 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-08-22 01:33:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:21,741 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-22 01:33:21,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 01:33:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-22 01:33:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 01:33:21,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:21,742 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:21,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 01:33:21,742 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:21,742 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-08-22 01:33:21,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:21,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782789372] [2020-08-22 01:33:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:22,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:22,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782789372] [2020-08-22 01:33:22,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:22,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 01:33:22,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053020321] [2020-08-22 01:33:22,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 01:33:22,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 01:33:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 01:33:22,764 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-08-22 01:33:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:22,917 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-08-22 01:33:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 01:33:22,917 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-08-22 01:33:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:22,919 INFO L225 Difference]: With dead ends: 106 [2020-08-22 01:33:22,919 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 01:33:22,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 01:33:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 01:33:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-22 01:33:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 01:33:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-08-22 01:33:22,924 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-08-22 01:33:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:22,925 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-08-22 01:33:22,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 01:33:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-08-22 01:33:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 01:33:22,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:22,926 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:22,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 01:33:22,926 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:22,926 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-08-22 01:33:22,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:22,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735253586] [2020-08-22 01:33:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:24,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735253586] [2020-08-22 01:33:24,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:24,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 01:33:24,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663099453] [2020-08-22 01:33:24,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 01:33:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 01:33:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:33:24,114 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-08-22 01:33:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:24,407 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-08-22 01:33:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 01:33:24,407 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-08-22 01:33:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:24,408 INFO L225 Difference]: With dead ends: 108 [2020-08-22 01:33:24,409 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 01:33:24,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:33:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 01:33:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-22 01:33:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 01:33:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-08-22 01:33:24,414 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-08-22 01:33:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:24,414 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-08-22 01:33:24,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 01:33:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-08-22 01:33:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 01:33:24,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:24,415 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:24,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 01:33:24,416 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-08-22 01:33:24,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:24,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4263288] [2020-08-22 01:33:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:25,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4263288] [2020-08-22 01:33:25,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:25,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 01:33:25,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894495493] [2020-08-22 01:33:25,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 01:33:25,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 01:33:25,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 01:33:25,628 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-08-22 01:33:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:25,858 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-08-22 01:33:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 01:33:25,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-08-22 01:33:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:25,859 INFO L225 Difference]: With dead ends: 110 [2020-08-22 01:33:25,859 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 01:33:25,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 01:33:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 01:33:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-22 01:33:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 01:33:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-08-22 01:33:25,865 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-08-22 01:33:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:25,866 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-08-22 01:33:25,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 01:33:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-08-22 01:33:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 01:33:25,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:25,867 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:25,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 01:33:25,867 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-08-22 01:33:25,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:25,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035748319] [2020-08-22 01:33:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:27,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035748319] [2020-08-22 01:33:27,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:27,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 01:33:27,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713976051] [2020-08-22 01:33:27,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 01:33:27,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:27,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 01:33:27,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 01:33:27,112 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-08-22 01:33:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:27,309 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-08-22 01:33:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 01:33:27,310 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-08-22 01:33:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:27,311 INFO L225 Difference]: With dead ends: 112 [2020-08-22 01:33:27,311 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 01:33:27,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 01:33:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 01:33:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-22 01:33:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 01:33:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-08-22 01:33:27,316 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-08-22 01:33:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:27,316 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-08-22 01:33:27,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 01:33:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-08-22 01:33:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 01:33:27,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:27,317 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:27,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 01:33:27,317 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 46 times [2020-08-22 01:33:27,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:27,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099864387] [2020-08-22 01:33:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:28,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:28,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099864387] [2020-08-22 01:33:28,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:28,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 01:33:28,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118909054] [2020-08-22 01:33:28,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 01:33:28,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 01:33:28,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 01:33:28,595 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-08-22 01:33:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:28,796 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-08-22 01:33:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 01:33:28,797 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-08-22 01:33:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:28,798 INFO L225 Difference]: With dead ends: 114 [2020-08-22 01:33:28,798 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 01:33:28,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 01:33:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 01:33:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-22 01:33:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 01:33:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-08-22 01:33:28,804 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-08-22 01:33:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:28,805 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-08-22 01:33:28,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 01:33:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-08-22 01:33:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 01:33:28,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:28,806 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:28,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 01:33:28,806 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1353943643, now seen corresponding path program 47 times [2020-08-22 01:33:28,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:28,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621911480] [2020-08-22 01:33:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:30,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:30,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621911480] [2020-08-22 01:33:30,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:30,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 01:33:30,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404671476] [2020-08-22 01:33:30,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 01:33:30,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 01:33:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 01:33:30,183 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-08-22 01:33:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:30,383 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-08-22 01:33:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 01:33:30,384 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-08-22 01:33:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:30,385 INFO L225 Difference]: With dead ends: 116 [2020-08-22 01:33:30,385 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:33:30,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 01:33:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:33:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-08-22 01:33:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 01:33:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-08-22 01:33:30,391 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-08-22 01:33:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:30,391 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-08-22 01:33:30,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 01:33:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-08-22 01:33:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 01:33:30,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:30,392 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:30,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 01:33:30,393 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1075971459, now seen corresponding path program 48 times [2020-08-22 01:33:30,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:30,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360415288] [2020-08-22 01:33:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:32,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:32,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360415288] [2020-08-22 01:33:32,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:32,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 01:33:32,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411504649] [2020-08-22 01:33:32,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 01:33:32,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 01:33:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 01:33:32,143 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-08-22 01:33:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:32,384 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-08-22 01:33:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 01:33:32,384 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-08-22 01:33:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:32,386 INFO L225 Difference]: With dead ends: 118 [2020-08-22 01:33:32,386 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 01:33:32,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 01:33:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 01:33:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-08-22 01:33:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 01:33:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-08-22 01:33:32,394 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-08-22 01:33:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:32,394 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-08-22 01:33:32,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 01:33:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-08-22 01:33:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 01:33:32,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:32,396 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:32,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 01:33:32,397 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 237824543, now seen corresponding path program 49 times [2020-08-22 01:33:32,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:32,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078200643] [2020-08-22 01:33:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:33,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:33,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078200643] [2020-08-22 01:33:33,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:33,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 01:33:33,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679836985] [2020-08-22 01:33:33,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 01:33:33,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 01:33:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 01:33:33,909 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-08-22 01:33:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:34,148 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-08-22 01:33:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 01:33:34,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-08-22 01:33:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:34,151 INFO L225 Difference]: With dead ends: 120 [2020-08-22 01:33:34,151 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 01:33:34,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 01:33:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 01:33:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-08-22 01:33:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 01:33:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-08-22 01:33:34,156 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-08-22 01:33:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:34,156 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-08-22 01:33:34,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 01:33:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-08-22 01:33:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 01:33:34,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:34,158 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:34,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 01:33:34,158 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:34,158 INFO L82 PathProgramCache]: Analyzing trace with hash 75397441, now seen corresponding path program 50 times [2020-08-22 01:33:34,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:34,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744392873] [2020-08-22 01:33:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:35,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:35,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744392873] [2020-08-22 01:33:35,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:35,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 01:33:35,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972820861] [2020-08-22 01:33:35,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 01:33:35,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 01:33:35,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 01:33:35,668 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-08-22 01:33:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:35,989 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-08-22 01:33:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-22 01:33:35,990 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-08-22 01:33:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:35,991 INFO L225 Difference]: With dead ends: 122 [2020-08-22 01:33:35,991 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 01:33:35,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 01:33:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 01:33:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-08-22 01:33:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-08-22 01:33:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-08-22 01:33:35,997 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-08-22 01:33:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:35,998 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-08-22 01:33:35,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 01:33:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-08-22 01:33:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 01:33:35,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:35,999 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:35,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 01:33:35,999 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1398224925, now seen corresponding path program 51 times [2020-08-22 01:33:36,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:36,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161370719] [2020-08-22 01:33:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:37,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:37,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161370719] [2020-08-22 01:33:37,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:37,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 01:33:37,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670341376] [2020-08-22 01:33:37,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 01:33:37,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:37,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 01:33:37,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 01:33:37,563 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-08-22 01:33:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:37,905 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-08-22 01:33:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 01:33:37,906 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-08-22 01:33:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:37,907 INFO L225 Difference]: With dead ends: 124 [2020-08-22 01:33:37,907 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 01:33:37,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 01:33:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 01:33:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-08-22 01:33:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 01:33:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-08-22 01:33:37,913 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-08-22 01:33:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:37,914 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-08-22 01:33:37,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 01:33:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-08-22 01:33:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 01:33:37,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:37,915 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:37,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 01:33:37,916 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash -210110971, now seen corresponding path program 52 times [2020-08-22 01:33:37,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:37,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380438814] [2020-08-22 01:33:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:39,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:39,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380438814] [2020-08-22 01:33:39,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:39,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-22 01:33:39,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063168332] [2020-08-22 01:33:39,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 01:33:39,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 01:33:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 01:33:39,630 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-08-22 01:33:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:39,948 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-08-22 01:33:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-22 01:33:39,949 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-08-22 01:33:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:39,950 INFO L225 Difference]: With dead ends: 126 [2020-08-22 01:33:39,950 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 01:33:39,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 01:33:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 01:33:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-08-22 01:33:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 01:33:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-08-22 01:33:39,955 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-08-22 01:33:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:39,955 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-08-22 01:33:39,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 01:33:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-08-22 01:33:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 01:33:39,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:39,958 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:39,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 01:33:39,958 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash -893901913, now seen corresponding path program 53 times [2020-08-22 01:33:39,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:39,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624502973] [2020-08-22 01:33:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:41,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:41,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624502973] [2020-08-22 01:33:41,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:41,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 01:33:41,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923854457] [2020-08-22 01:33:41,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 01:33:41,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 01:33:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 01:33:41,629 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-08-22 01:33:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:41,875 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-08-22 01:33:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 01:33:41,876 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-08-22 01:33:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:41,877 INFO L225 Difference]: With dead ends: 128 [2020-08-22 01:33:41,877 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 01:33:41,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 01:33:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 01:33:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-08-22 01:33:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-22 01:33:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-08-22 01:33:41,882 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-08-22 01:33:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:41,882 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-08-22 01:33:41,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 01:33:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-08-22 01:33:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 01:33:41,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:41,883 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:41,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 01:33:41,884 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash -887000887, now seen corresponding path program 54 times [2020-08-22 01:33:41,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:41,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147921225] [2020-08-22 01:33:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:43,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147921225] [2020-08-22 01:33:43,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:43,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-22 01:33:43,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308745938] [2020-08-22 01:33:43,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 01:33:43,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 01:33:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 01:33:43,612 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-08-22 01:33:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:43,955 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-08-22 01:33:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 01:33:43,956 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-08-22 01:33:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:43,957 INFO L225 Difference]: With dead ends: 130 [2020-08-22 01:33:43,957 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 01:33:43,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 01:33:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 01:33:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-08-22 01:33:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 01:33:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-08-22 01:33:43,962 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-08-22 01:33:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:43,962 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-08-22 01:33:43,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 01:33:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-08-22 01:33:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 01:33:43,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:43,963 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:43,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 01:33:43,964 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1449917803, now seen corresponding path program 55 times [2020-08-22 01:33:43,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:43,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721632356] [2020-08-22 01:33:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:45,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:45,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721632356] [2020-08-22 01:33:45,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:45,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 01:33:45,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222471253] [2020-08-22 01:33:45,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 01:33:45,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:45,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 01:33:45,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 01:33:45,746 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-08-22 01:33:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:45,973 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-08-22 01:33:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 01:33:45,974 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-08-22 01:33:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:45,975 INFO L225 Difference]: With dead ends: 132 [2020-08-22 01:33:45,975 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 01:33:45,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 01:33:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 01:33:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-08-22 01:33:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 01:33:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-08-22 01:33:45,983 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-08-22 01:33:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:45,983 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-08-22 01:33:45,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 01:33:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-08-22 01:33:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 01:33:45,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:45,984 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:45,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 01:33:45,987 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:45,987 INFO L82 PathProgramCache]: Analyzing trace with hash 960883085, now seen corresponding path program 56 times [2020-08-22 01:33:45,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:45,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810547273] [2020-08-22 01:33:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:47,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:47,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810547273] [2020-08-22 01:33:47,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:47,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-08-22 01:33:47,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896444031] [2020-08-22 01:33:47,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 01:33:47,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 01:33:47,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 01:33:47,948 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-08-22 01:33:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:48,300 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-08-22 01:33:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-22 01:33:48,301 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-08-22 01:33:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:48,302 INFO L225 Difference]: With dead ends: 134 [2020-08-22 01:33:48,302 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 01:33:48,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 01:33:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 01:33:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-08-22 01:33:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 01:33:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-08-22 01:33:48,307 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-08-22 01:33:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:48,307 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-08-22 01:33:48,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 01:33:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-08-22 01:33:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 01:33:48,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:48,308 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:48,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 01:33:48,308 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:48,309 INFO L82 PathProgramCache]: Analyzing trace with hash -850045649, now seen corresponding path program 57 times [2020-08-22 01:33:48,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:48,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328474059] [2020-08-22 01:33:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:50,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:33:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:33:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:33:50,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328474059] [2020-08-22 01:33:50,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:33:50,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-22 01:33:50,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246844123] [2020-08-22 01:33:50,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 01:33:50,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:33:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 01:33:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 01:33:50,256 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-08-22 01:33:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:33:50,502 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-08-22 01:33:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 01:33:50,503 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-08-22 01:33:50,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:33:50,504 INFO L225 Difference]: With dead ends: 136 [2020-08-22 01:33:50,504 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 01:33:50,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 01:33:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 01:33:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-08-22 01:33:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 01:33:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-08-22 01:33:50,508 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-08-22 01:33:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:33:50,509 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-08-22 01:33:50,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 01:33:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-08-22 01:33:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 01:33:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:33:50,510 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:33:50,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 01:33:50,510 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:33:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:33:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1690804143, now seen corresponding path program 58 times [2020-08-22 01:33:50,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:33:50,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285166915] [2020-08-22 01:33:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:33:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat