/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:08:58,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:08:58,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:08:58,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:08:58,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:08:59,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:08:59,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:08:59,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:08:59,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:08:59,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:08:59,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:08:59,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:08:59,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:08:59,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:08:59,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:08:59,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:08:59,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:08:59,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:08:59,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:08:59,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:08:59,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:08:59,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:08:59,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:08:59,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:08:59,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:08:59,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:08:59,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:08:59,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:08:59,041 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 [2020-09-24 15:08:59,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:08:59,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:08:59,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:08:59,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:08:59,078 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:08:59,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:08:59,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:08:59,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:08:59,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:08:59,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:08:59,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:08:59,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:08:59,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:08:59,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:08:59,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:08:59,081 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:08:59,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:08:59,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:08:59,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:08:59,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:08:59,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:08:59,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:59,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:08:59,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:08:59,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:08:59,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:08:59,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:08:59,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:08:59,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:08:59,087 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:08:59,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:08:59,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:08:59,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:08:59,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:08:59,619 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:08:59,621 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-09-24 15:08:59,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e004d964c/33f2e02fb2624aa8a2905df89ee168bd/FLAGd1a517419 [2020-09-24 15:09:00,297 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:09:00,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-09-24 15:09:00,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e004d964c/33f2e02fb2624aa8a2905df89ee168bd/FLAGd1a517419 [2020-09-24 15:09:00,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e004d964c/33f2e02fb2624aa8a2905df89ee168bd [2020-09-24 15:09:00,631 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:09:00,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:09:00,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:09:00,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:09:00,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:09:00,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:09:00" (1/1) ... [2020-09-24 15:09:00,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333f50dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:00, skipping insertion in model container [2020-09-24 15:09:00,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:09:00" (1/1) ... [2020-09-24 15:09:00,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:09:00,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:09:01,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:09:01,036 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:09:01,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:09:01,232 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:09:01,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01 WrapperNode [2020-09-24 15:09:01,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:09:01,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:09:01,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:09:01,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:09:01,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (1/1) ... [2020-09-24 15:09:01,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:09:01,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:09:01,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:09:01,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:09:01,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (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 [2020-09-24 15:09:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:09:01,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:09:01,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:09:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:09:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-24 15:09:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-24 15:09:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:09:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:09:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 15:09:01,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 15:09:01,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 15:09:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 15:09:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 15:09:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:09:01,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:09:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 15:09:01,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 15:09:02,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:09:02,356 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 15:09:02,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:09:02 BoogieIcfgContainer [2020-09-24 15:09:02,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:09:02,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:09:02,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:09:02,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:09:02,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:09:00" (1/3) ... [2020-09-24 15:09:02,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fd45a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:09:02, skipping insertion in model container [2020-09-24 15:09:02,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:01" (2/3) ... [2020-09-24 15:09:02,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fd45a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:09:02, skipping insertion in model container [2020-09-24 15:09:02,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:09:02" (3/3) ... [2020-09-24 15:09:02,375 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-09-24 15:09:02,387 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:09:02,399 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:09:02,419 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:09:02,450 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:09:02,450 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:09:02,450 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:09:02,450 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:09:02,450 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:09:02,451 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:09:02,451 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:09:02,451 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:09:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states. [2020-09-24 15:09:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 15:09:02,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:02,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:02,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1683722235, now seen corresponding path program 1 times [2020-09-24 15:09:02,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:02,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386879943] [2020-09-24 15:09:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:03,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:03,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386879943] [2020-09-24 15:09:03,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:09:03,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:09:03,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546861346] [2020-09-24 15:09:03,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:09:03,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:09:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:09:03,420 INFO L87 Difference]: Start difference. First operand 363 states. Second operand 5 states. [2020-09-24 15:09:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:04,222 INFO L93 Difference]: Finished difference Result 416 states and 424 transitions. [2020-09-24 15:09:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:09:04,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-24 15:09:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:04,244 INFO L225 Difference]: With dead ends: 416 [2020-09-24 15:09:04,245 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 15:09:04,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:09:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 15:09:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-24 15:09:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-24 15:09:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2020-09-24 15:09:04,328 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 317 [2020-09-24 15:09:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:04,330 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2020-09-24 15:09:04,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:09:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2020-09-24 15:09:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 15:09:04,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:04,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:04,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:09:04,340 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash 346805738, now seen corresponding path program 1 times [2020-09-24 15:09:04,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:04,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454281784] [2020-09-24 15:09:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:04,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454281784] [2020-09-24 15:09:04,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:04,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 15:09:04,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668792948] [2020-09-24 15:09:04,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:09:04,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:09:04,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:09:04,982 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 6 states. [2020-09-24 15:09:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:06,194 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2020-09-24 15:09:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:09:06,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-24 15:09:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:06,203 INFO L225 Difference]: With dead ends: 374 [2020-09-24 15:09:06,206 INFO L226 Difference]: Without dead ends: 366 [2020-09-24 15:09:06,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:09:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-24 15:09:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-24 15:09:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-24 15:09:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2020-09-24 15:09:06,254 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 334 [2020-09-24 15:09:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:06,260 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2020-09-24 15:09:06,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:09:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2020-09-24 15:09:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-24 15:09:06,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:06,268 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:06,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:09:06,269 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash -461354021, now seen corresponding path program 2 times [2020-09-24 15:09:06,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:06,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133045872] [2020-09-24 15:09:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:06,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:06,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133045872] [2020-09-24 15:09:06,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:06,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:09:06,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903620827] [2020-09-24 15:09:06,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:09:06,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:06,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:09:06,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:09:06,688 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 7 states. [2020-09-24 15:09:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:07,709 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2020-09-24 15:09:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 15:09:07,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-24 15:09:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:07,713 INFO L225 Difference]: With dead ends: 391 [2020-09-24 15:09:07,713 INFO L226 Difference]: Without dead ends: 383 [2020-09-24 15:09:07,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:09:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-24 15:09:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-24 15:09:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 15:09:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2020-09-24 15:09:07,744 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 351 [2020-09-24 15:09:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:07,745 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2020-09-24 15:09:07,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:09:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2020-09-24 15:09:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-24 15:09:07,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:07,753 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:07,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:09:07,753 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -254126582, now seen corresponding path program 3 times [2020-09-24 15:09:07,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:07,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214693733] [2020-09-24 15:09:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:08,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214693733] [2020-09-24 15:09:08,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:08,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:09:08,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050791893] [2020-09-24 15:09:08,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:09:08,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:08,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:09:08,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:09:08,231 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 8 states. [2020-09-24 15:09:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:09,194 INFO L93 Difference]: Finished difference Result 408 states and 408 transitions. [2020-09-24 15:09:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:09:09,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-24 15:09:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:09,199 INFO L225 Difference]: With dead ends: 408 [2020-09-24 15:09:09,199 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 15:09:09,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:09:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 15:09:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-24 15:09:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-24 15:09:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 386 transitions. [2020-09-24 15:09:09,219 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 386 transitions. Word has length 368 [2020-09-24 15:09:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:09,220 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 386 transitions. [2020-09-24 15:09:09,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:09:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 386 transitions. [2020-09-24 15:09:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-24 15:09:09,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:09,226 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:09,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:09:09,227 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:09,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1386344517, now seen corresponding path program 4 times [2020-09-24 15:09:09,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:09,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323628917] [2020-09-24 15:09:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:09,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:09,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323628917] [2020-09-24 15:09:09,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:09,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:09:09,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356090452] [2020-09-24 15:09:09,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:09:09,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:09:09,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:09:09,712 INFO L87 Difference]: Start difference. First operand 386 states and 386 transitions. Second operand 9 states. [2020-09-24 15:09:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:10,849 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2020-09-24 15:09:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:09:10,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-24 15:09:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:10,853 INFO L225 Difference]: With dead ends: 425 [2020-09-24 15:09:10,853 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 15:09:10,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:09:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 15:09:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-24 15:09:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-24 15:09:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2020-09-24 15:09:10,867 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 385 [2020-09-24 15:09:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:10,868 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2020-09-24 15:09:10,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:09:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2020-09-24 15:09:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 15:09:10,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:10,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:10,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:09:10,872 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:10,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2088816170, now seen corresponding path program 5 times [2020-09-24 15:09:10,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:10,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801416671] [2020-09-24 15:09:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:11,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:11,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801416671] [2020-09-24 15:09:11,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:11,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:09:11,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201534350] [2020-09-24 15:09:11,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:09:11,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:09:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:09:11,327 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 10 states. [2020-09-24 15:09:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:12,673 INFO L93 Difference]: Finished difference Result 442 states and 442 transitions. [2020-09-24 15:09:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:09:12,674 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-24 15:09:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:12,678 INFO L225 Difference]: With dead ends: 442 [2020-09-24 15:09:12,679 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 15:09:12,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:09:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 15:09:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-24 15:09:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-24 15:09:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 420 transitions. [2020-09-24 15:09:12,706 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 420 transitions. Word has length 402 [2020-09-24 15:09:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:12,707 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 420 transitions. [2020-09-24 15:09:12,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:09:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 420 transitions. [2020-09-24 15:09:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 15:09:12,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:12,711 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:12,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:09:12,711 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash 380820379, now seen corresponding path program 6 times [2020-09-24 15:09:12,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:12,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71334811] [2020-09-24 15:09:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:13,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:13,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71334811] [2020-09-24 15:09:13,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:13,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:09:13,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254560149] [2020-09-24 15:09:13,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:09:13,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:09:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:09:13,241 INFO L87 Difference]: Start difference. First operand 420 states and 420 transitions. Second operand 11 states. [2020-09-24 15:09:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:14,842 INFO L93 Difference]: Finished difference Result 459 states and 459 transitions. [2020-09-24 15:09:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:09:14,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-24 15:09:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:14,848 INFO L225 Difference]: With dead ends: 459 [2020-09-24 15:09:14,848 INFO L226 Difference]: Without dead ends: 451 [2020-09-24 15:09:14,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:09:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-24 15:09:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-24 15:09:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-24 15:09:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 437 transitions. [2020-09-24 15:09:14,862 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 437 transitions. Word has length 419 [2020-09-24 15:09:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:14,863 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 437 transitions. [2020-09-24 15:09:14,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:09:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 437 transitions. [2020-09-24 15:09:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-24 15:09:14,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:14,867 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:14,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:09:14,867 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 329334346, now seen corresponding path program 7 times [2020-09-24 15:09:14,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:14,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687383396] [2020-09-24 15:09:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:15,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687383396] [2020-09-24 15:09:15,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:15,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:09:15,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341593541] [2020-09-24 15:09:15,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:09:15,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:09:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:09:15,372 INFO L87 Difference]: Start difference. First operand 437 states and 437 transitions. Second operand 12 states. [2020-09-24 15:09:17,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:17,014 INFO L93 Difference]: Finished difference Result 476 states and 476 transitions. [2020-09-24 15:09:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:09:17,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-09-24 15:09:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:17,019 INFO L225 Difference]: With dead ends: 476 [2020-09-24 15:09:17,019 INFO L226 Difference]: Without dead ends: 468 [2020-09-24 15:09:17,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:09:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-09-24 15:09:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-09-24 15:09:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-09-24 15:09:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 454 transitions. [2020-09-24 15:09:17,032 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 454 transitions. Word has length 436 [2020-09-24 15:09:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:17,033 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 454 transitions. [2020-09-24 15:09:17,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:09:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 454 transitions. [2020-09-24 15:09:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-24 15:09:17,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:17,037 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:17,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:09:17,037 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash 146583419, now seen corresponding path program 8 times [2020-09-24 15:09:17,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:17,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180023880] [2020-09-24 15:09:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:17,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:17,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180023880] [2020-09-24 15:09:17,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:17,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:09:17,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609155806] [2020-09-24 15:09:17,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:09:17,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:09:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:09:17,667 INFO L87 Difference]: Start difference. First operand 454 states and 454 transitions. Second operand 13 states. [2020-09-24 15:09:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:19,542 INFO L93 Difference]: Finished difference Result 493 states and 493 transitions. [2020-09-24 15:09:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:09:19,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-09-24 15:09:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:19,547 INFO L225 Difference]: With dead ends: 493 [2020-09-24 15:09:19,547 INFO L226 Difference]: Without dead ends: 485 [2020-09-24 15:09:19,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:09:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-09-24 15:09:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-09-24 15:09:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-09-24 15:09:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 471 transitions. [2020-09-24 15:09:19,560 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 471 transitions. Word has length 453 [2020-09-24 15:09:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:19,561 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 471 transitions. [2020-09-24 15:09:19,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:09:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 471 transitions. [2020-09-24 15:09:19,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-24 15:09:19,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:19,565 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:19,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:09:19,565 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1849842070, now seen corresponding path program 9 times [2020-09-24 15:09:19,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:19,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875097348] [2020-09-24 15:09:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:20,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875097348] [2020-09-24 15:09:20,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:20,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 15:09:20,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279327552] [2020-09-24 15:09:20,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 15:09:20,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 15:09:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:09:20,242 INFO L87 Difference]: Start difference. First operand 471 states and 471 transitions. Second operand 14 states. [2020-09-24 15:09:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:22,218 INFO L93 Difference]: Finished difference Result 510 states and 510 transitions. [2020-09-24 15:09:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:09:22,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-09-24 15:09:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:22,223 INFO L225 Difference]: With dead ends: 510 [2020-09-24 15:09:22,223 INFO L226 Difference]: Without dead ends: 502 [2020-09-24 15:09:22,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:09:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-24 15:09:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-09-24 15:09:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-09-24 15:09:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 488 transitions. [2020-09-24 15:09:22,235 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 488 transitions. Word has length 470 [2020-09-24 15:09:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:22,236 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 488 transitions. [2020-09-24 15:09:22,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 15:09:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 488 transitions. [2020-09-24 15:09:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-24 15:09:22,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:22,240 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:22,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:09:22,240 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash -600208549, now seen corresponding path program 10 times [2020-09-24 15:09:22,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:22,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053225057] [2020-09-24 15:09:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:22,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:22,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053225057] [2020-09-24 15:09:22,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:22,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 15:09:22,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959739775] [2020-09-24 15:09:22,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 15:09:22,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 15:09:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:09:22,947 INFO L87 Difference]: Start difference. First operand 488 states and 488 transitions. Second operand 15 states. [2020-09-24 15:09:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:25,210 INFO L93 Difference]: Finished difference Result 527 states and 527 transitions. [2020-09-24 15:09:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:09:25,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-09-24 15:09:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:25,215 INFO L225 Difference]: With dead ends: 527 [2020-09-24 15:09:25,215 INFO L226 Difference]: Without dead ends: 519 [2020-09-24 15:09:25,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-24 15:09:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-09-24 15:09:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-09-24 15:09:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-09-24 15:09:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 505 transitions. [2020-09-24 15:09:25,227 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 505 transitions. Word has length 487 [2020-09-24 15:09:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:25,228 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 505 transitions. [2020-09-24 15:09:25,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 15:09:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 505 transitions. [2020-09-24 15:09:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-09-24 15:09:25,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:25,232 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:25,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:09:25,232 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1909982858, now seen corresponding path program 11 times [2020-09-24 15:09:25,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:25,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605088586] [2020-09-24 15:09:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:25,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:26,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605088586] [2020-09-24 15:09:26,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:26,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 15:09:26,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708612125] [2020-09-24 15:09:26,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 15:09:26,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 15:09:26,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:09:26,035 INFO L87 Difference]: Start difference. First operand 505 states and 505 transitions. Second operand 16 states. [2020-09-24 15:09:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:28,447 INFO L93 Difference]: Finished difference Result 544 states and 544 transitions. [2020-09-24 15:09:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:09:28,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-09-24 15:09:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:28,456 INFO L225 Difference]: With dead ends: 544 [2020-09-24 15:09:28,456 INFO L226 Difference]: Without dead ends: 536 [2020-09-24 15:09:28,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-24 15:09:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-24 15:09:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-24 15:09:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-24 15:09:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 522 transitions. [2020-09-24 15:09:28,469 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 522 transitions. Word has length 504 [2020-09-24 15:09:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:28,471 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 522 transitions. [2020-09-24 15:09:28,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 15:09:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 522 transitions. [2020-09-24 15:09:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-09-24 15:09:28,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:28,475 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:28,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:09:28,475 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:28,478 INFO L82 PathProgramCache]: Analyzing trace with hash 979857211, now seen corresponding path program 12 times [2020-09-24 15:09:28,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:28,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296027769] [2020-09-24 15:09:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:29,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:29,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296027769] [2020-09-24 15:09:29,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:29,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 15:09:29,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466883161] [2020-09-24 15:09:29,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 15:09:29,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 15:09:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:09:29,584 INFO L87 Difference]: Start difference. First operand 522 states and 522 transitions. Second operand 17 states. [2020-09-24 15:09:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:32,259 INFO L93 Difference]: Finished difference Result 561 states and 561 transitions. [2020-09-24 15:09:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 15:09:32,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 521 [2020-09-24 15:09:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:32,263 INFO L225 Difference]: With dead ends: 561 [2020-09-24 15:09:32,263 INFO L226 Difference]: Without dead ends: 553 [2020-09-24 15:09:32,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-24 15:09:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-09-24 15:09:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 539. [2020-09-24 15:09:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-09-24 15:09:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2020-09-24 15:09:32,275 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 521 [2020-09-24 15:09:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:32,275 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2020-09-24 15:09:32,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 15:09:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2020-09-24 15:09:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-09-24 15:09:32,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:32,280 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:32,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:09:32,280 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash -294494550, now seen corresponding path program 13 times [2020-09-24 15:09:32,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:32,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519223917] [2020-09-24 15:09:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:32,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 1391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:33,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519223917] [2020-09-24 15:09:33,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:33,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 15:09:33,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941108661] [2020-09-24 15:09:33,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 15:09:33,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 15:09:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:09:33,138 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 18 states. [2020-09-24 15:09:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:36,082 INFO L93 Difference]: Finished difference Result 578 states and 578 transitions. [2020-09-24 15:09:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:09:36,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 538 [2020-09-24 15:09:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:36,086 INFO L225 Difference]: With dead ends: 578 [2020-09-24 15:09:36,087 INFO L226 Difference]: Without dead ends: 570 [2020-09-24 15:09:36,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 15:09:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-09-24 15:09:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-09-24 15:09:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-09-24 15:09:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 556 transitions. [2020-09-24 15:09:36,105 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 556 transitions. Word has length 538 [2020-09-24 15:09:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:36,106 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 556 transitions. [2020-09-24 15:09:36,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 15:09:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 556 transitions. [2020-09-24 15:09:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-09-24 15:09:36,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:36,110 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:36,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:09:36,111 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -50046181, now seen corresponding path program 14 times [2020-09-24 15:09:36,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:36,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232003021] [2020-09-24 15:09:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:36,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:37,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232003021] [2020-09-24 15:09:37,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:37,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 15:09:37,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733012376] [2020-09-24 15:09:37,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 15:09:37,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:37,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 15:09:37,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:09:37,015 INFO L87 Difference]: Start difference. First operand 556 states and 556 transitions. Second operand 19 states. [2020-09-24 15:09:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:40,238 INFO L93 Difference]: Finished difference Result 595 states and 595 transitions. [2020-09-24 15:09:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 15:09:40,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 555 [2020-09-24 15:09:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:40,242 INFO L225 Difference]: With dead ends: 595 [2020-09-24 15:09:40,243 INFO L226 Difference]: Without dead ends: 587 [2020-09-24 15:09:40,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 15:09:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-09-24 15:09:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 573. [2020-09-24 15:09:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-09-24 15:09:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 573 transitions. [2020-09-24 15:09:40,255 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 573 transitions. Word has length 555 [2020-09-24 15:09:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:40,255 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 573 transitions. [2020-09-24 15:09:40,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 15:09:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 573 transitions. [2020-09-24 15:09:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-09-24 15:09:40,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:40,260 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:40,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:09:40,261 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash 562998986, now seen corresponding path program 15 times [2020-09-24 15:09:40,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:40,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807315314] [2020-09-24 15:09:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:40,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 1860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:41,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807315314] [2020-09-24 15:09:41,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:41,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 15:09:41,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34280915] [2020-09-24 15:09:41,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 15:09:41,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 15:09:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:09:41,174 INFO L87 Difference]: Start difference. First operand 573 states and 573 transitions. Second operand 20 states. [2020-09-24 15:09:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:44,679 INFO L93 Difference]: Finished difference Result 612 states and 612 transitions. [2020-09-24 15:09:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 15:09:44,680 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 572 [2020-09-24 15:09:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:44,683 INFO L225 Difference]: With dead ends: 612 [2020-09-24 15:09:44,684 INFO L226 Difference]: Without dead ends: 604 [2020-09-24 15:09:44,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 15:09:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-24 15:09:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 590. [2020-09-24 15:09:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-09-24 15:09:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 590 transitions. [2020-09-24 15:09:44,698 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 590 transitions. Word has length 572 [2020-09-24 15:09:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:44,698 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 590 transitions. [2020-09-24 15:09:44,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 15:09:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 590 transitions. [2020-09-24 15:09:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-09-24 15:09:44,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:44,704 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:44,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:09:44,704 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 240013051, now seen corresponding path program 16 times [2020-09-24 15:09:44,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:44,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963470193] [2020-09-24 15:09:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:45,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 0 proven. 2120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:45,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963470193] [2020-09-24 15:09:45,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:45,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 15:09:45,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314680241] [2020-09-24 15:09:45,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 15:09:45,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 15:09:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:09:45,907 INFO L87 Difference]: Start difference. First operand 590 states and 590 transitions. Second operand 21 states. [2020-09-24 15:09:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:49,699 INFO L93 Difference]: Finished difference Result 629 states and 629 transitions. [2020-09-24 15:09:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:09:49,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 589 [2020-09-24 15:09:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:49,703 INFO L225 Difference]: With dead ends: 629 [2020-09-24 15:09:49,703 INFO L226 Difference]: Without dead ends: 621 [2020-09-24 15:09:49,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 15:09:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-09-24 15:09:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2020-09-24 15:09:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-09-24 15:09:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 607 transitions. [2020-09-24 15:09:49,716 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 607 transitions. Word has length 589 [2020-09-24 15:09:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:49,717 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 607 transitions. [2020-09-24 15:09:49,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 15:09:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 607 transitions. [2020-09-24 15:09:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-09-24 15:09:49,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:49,722 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:49,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:09:49,722 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash 615446250, now seen corresponding path program 17 times [2020-09-24 15:09:49,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:49,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517871237] [2020-09-24 15:09:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:50,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 0 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:51,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517871237] [2020-09-24 15:09:51,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:51,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 15:09:51,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336106165] [2020-09-24 15:09:51,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 15:09:51,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:51,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 15:09:51,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:09:51,184 INFO L87 Difference]: Start difference. First operand 607 states and 607 transitions. Second operand 22 states. [2020-09-24 15:09:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:55,262 INFO L93 Difference]: Finished difference Result 646 states and 646 transitions. [2020-09-24 15:09:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 15:09:55,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 606 [2020-09-24 15:09:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:55,267 INFO L225 Difference]: With dead ends: 646 [2020-09-24 15:09:55,267 INFO L226 Difference]: Without dead ends: 638 [2020-09-24 15:09:55,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 15:09:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-24 15:09:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 624. [2020-09-24 15:09:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-09-24 15:09:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 624 transitions. [2020-09-24 15:09:55,282 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 624 transitions. Word has length 606 [2020-09-24 15:09:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:55,282 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 624 transitions. [2020-09-24 15:09:55,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 15:09:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 624 transitions. [2020-09-24 15:09:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-09-24 15:09:55,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:55,288 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:55,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:09:55,289 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1224952539, now seen corresponding path program 18 times [2020-09-24 15:09:55,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:55,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674662969] [2020-09-24 15:09:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:56,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2691 backedges. 0 proven. 2691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:56,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674662969] [2020-09-24 15:09:56,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:09:56,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 15:09:56,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874429093] [2020-09-24 15:09:56,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 15:09:56,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:56,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 15:09:56,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:09:56,651 INFO L87 Difference]: Start difference. First operand 624 states and 624 transitions. Second operand 23 states.