/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:10:29,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:10:29,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:10:29,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:10:29,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:10:29,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:10:29,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:10:29,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:10:29,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:10:29,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:10:29,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:10:29,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:10:29,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:10:29,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:10:29,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:10:29,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:10:29,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:10:29,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:10:29,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:10:29,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:10:29,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:10:29,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:10:29,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:10:29,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:10:29,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:10:29,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:10:29,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:10:29,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:10:29,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:10:29,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:10:29,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:10:29,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:10:29,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:10:29,944 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:10:29,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:10:29,944 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:10:29,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:10:29,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:10:29,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:10:29,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:10:29,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:10:29,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:10:29,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:10:29,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:10:29,947 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:10:29,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:10:29,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:10:29,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:10:29,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:10:29,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:10:29,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:10:29,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:10:29,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:10:29,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:10:29,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:10:29,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:10:29,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:10:29,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:10:29,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 06:10:30,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:10:30,317 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:10:30,321 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:10:30,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:10:30,323 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:10:30,324 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 06:10:30,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba65913bc/dd21bea0bab54b32b7778cacf3a177fd/FLAG04a96e4ce [2020-08-19 06:10:31,003 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:10:31,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 06:10:31,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba65913bc/dd21bea0bab54b32b7778cacf3a177fd/FLAG04a96e4ce [2020-08-19 06:10:31,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba65913bc/dd21bea0bab54b32b7778cacf3a177fd [2020-08-19 06:10:31,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:10:31,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:10:31,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:10:31,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:10:31,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:10:31,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:10:31" (1/1) ... [2020-08-19 06:10:31,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336ce4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:31, skipping insertion in model container [2020-08-19 06:10:31,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:10:31" (1/1) ... [2020-08-19 06:10:31,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:10:31,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:10:31,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:10:31,963 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:10:32,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:10:32,502 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:10:32,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32 WrapperNode [2020-08-19 06:10:32,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:10:32,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:10:32,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:10:32,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:10:32,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... [2020-08-19 06:10:32,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:10:32,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:10:32,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:10:32,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:10:32,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:10:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:10:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:10:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 06:10:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:10:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:10:32,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:10:32,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 06:10:32,713 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 06:10:32,713 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 06:10:32,714 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 06:10:32,714 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 06:10:32,714 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 06:10:32,715 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 06:10:32,715 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 06:10:32,715 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 06:10:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 06:10:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 06:10:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:10:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:10:32,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:10:34,353 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:10:34,354 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:10:34,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:10:34 BoogieIcfgContainer [2020-08-19 06:10:34,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:10:34,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:10:34,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:10:34,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:10:34,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:10:31" (1/3) ... [2020-08-19 06:10:34,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760a5f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:10:34, skipping insertion in model container [2020-08-19 06:10:34,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:10:32" (2/3) ... [2020-08-19 06:10:34,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760a5f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:10:34, skipping insertion in model container [2020-08-19 06:10:34,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:10:34" (3/3) ... [2020-08-19 06:10:34,372 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 06:10:34,384 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:10:34,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-19 06:10:34,412 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-19 06:10:34,448 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:10:34,448 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:10:34,448 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:10:34,448 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:10:34,449 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:10:34,449 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:10:34,449 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:10:34,449 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:10:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-19 06:10:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 06:10:34,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:34,501 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] [2020-08-19 06:10:34,502 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-19 06:10:34,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:34,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499737149] [2020-08-19 06:10:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:35,612 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:35,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:35,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499737149] [2020-08-19 06:10:35,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:35,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:10:35,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125364900] [2020-08-19 06:10:35,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:10:35,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:10:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:10:35,730 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-19 06:10:36,045 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 06:10:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:10:38,878 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-19 06:10:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:10:38,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 06:10:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:10:38,903 INFO L225 Difference]: With dead ends: 754 [2020-08-19 06:10:38,903 INFO L226 Difference]: Without dead ends: 593 [2020-08-19 06:10:38,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:10:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-19 06:10:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-19 06:10:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-19 06:10:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-19 06:10:39,026 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-19 06:10:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:10:39,027 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-19 06:10:39,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:10:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-19 06:10:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 06:10:39,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:39,032 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] [2020-08-19 06:10:39,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:10:39,033 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-19 06:10:39,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:39,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455010411] [2020-08-19 06:10:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:39,472 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:39,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:39,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455010411] [2020-08-19 06:10:39,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:39,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:10:39,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606448983] [2020-08-19 06:10:39,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:10:39,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:10:39,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:10:39,531 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-19 06:10:39,846 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 06:10:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:10:42,004 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-19 06:10:42,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:10:42,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 06:10:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:10:42,011 INFO L225 Difference]: With dead ends: 1190 [2020-08-19 06:10:42,011 INFO L226 Difference]: Without dead ends: 961 [2020-08-19 06:10:42,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:10:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-19 06:10:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-19 06:10:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-19 06:10:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-19 06:10:42,106 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-19 06:10:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:10:42,108 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-19 06:10:42,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:10:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-19 06:10:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 06:10:42,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:42,118 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] [2020-08-19 06:10:42,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:10:42,123 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-19 06:10:42,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:42,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742651779] [2020-08-19 06:10:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:42,544 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:42,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:42,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742651779] [2020-08-19 06:10:42,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:42,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:10:42,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478736788] [2020-08-19 06:10:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:10:42,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:10:42,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:10:42,660 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-19 06:10:42,892 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 06:10:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:10:45,122 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-19 06:10:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:10:45,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 06:10:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:10:45,139 INFO L225 Difference]: With dead ends: 2090 [2020-08-19 06:10:45,140 INFO L226 Difference]: Without dead ends: 1701 [2020-08-19 06:10:45,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:10:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-19 06:10:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-19 06:10:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-19 06:10:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-19 06:10:45,245 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-19 06:10:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:10:45,245 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-19 06:10:45,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:10:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-19 06:10:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 06:10:45,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:45,252 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] [2020-08-19 06:10:45,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:10:45,254 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:45,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:45,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-19 06:10:45,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:45,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950590482] [2020-08-19 06:10:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:45,845 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:45,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:45,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950590482] [2020-08-19 06:10:45,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:45,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:10:45,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666739427] [2020-08-19 06:10:45,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:10:45,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:45,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:10:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:10:45,964 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-19 06:10:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:10:49,742 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-19 06:10:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:10:49,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-19 06:10:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:10:49,760 INFO L225 Difference]: With dead ends: 4967 [2020-08-19 06:10:49,760 INFO L226 Difference]: Without dead ends: 3281 [2020-08-19 06:10:49,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:10:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-19 06:10:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-19 06:10:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-19 06:10:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-19 06:10:49,905 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-19 06:10:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:10:49,906 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-19 06:10:49,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:10:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-19 06:10:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-19 06:10:49,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:49,912 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] [2020-08-19 06:10:49,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:10:49,912 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-19 06:10:49,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:49,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823694374] [2020-08-19 06:10:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:50,248 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:50,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:50,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823694374] [2020-08-19 06:10:50,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:50,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:10:50,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576785565] [2020-08-19 06:10:50,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:10:50,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:10:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:10:50,436 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-19 06:10:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:10:53,008 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-19 06:10:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:10:53,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-19 06:10:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:10:53,042 INFO L225 Difference]: With dead ends: 9659 [2020-08-19 06:10:53,042 INFO L226 Difference]: Without dead ends: 6456 [2020-08-19 06:10:53,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:10:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-19 06:10:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-19 06:10:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-19 06:10:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-19 06:10:53,227 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-19 06:10:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:10:53,228 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-19 06:10:53,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:10:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-19 06:10:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-19 06:10:53,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:53,236 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] [2020-08-19 06:10:53,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:10:53,236 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-19 06:10:53,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:53,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698135419] [2020-08-19 06:10:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:53,754 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:53,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:53,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698135419] [2020-08-19 06:10:53,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:53,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:10:53,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49808563] [2020-08-19 06:10:53,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:10:53,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:10:53,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:10:53,846 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-19 06:10:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:10:57,027 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-19 06:10:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:10:57,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-19 06:10:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:10:57,058 INFO L225 Difference]: With dead ends: 9441 [2020-08-19 06:10:57,058 INFO L226 Difference]: Without dead ends: 6238 [2020-08-19 06:10:57,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:10:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-19 06:10:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-19 06:10:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-19 06:10:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-19 06:10:57,334 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-19 06:10:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:10:57,334 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-19 06:10:57,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:10:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-19 06:10:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-19 06:10:57,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:10:57,343 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] [2020-08-19 06:10:57,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:10:57,344 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:10:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:10:57,344 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-19 06:10:57,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:10:57,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098914805] [2020-08-19 06:10:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:10:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:57,690 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:10:57,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:10:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:10:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:10:57,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098914805] [2020-08-19 06:10:57,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:10:57,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:10:57,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854926188] [2020-08-19 06:10:57,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:10:57,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:10:57,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:10:57,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:10:57,729 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-19 06:11:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:11:01,119 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-19 06:11:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:11:01,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-19 06:11:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:11:01,165 INFO L225 Difference]: With dead ends: 18492 [2020-08-19 06:11:01,166 INFO L226 Difference]: Without dead ends: 12348 [2020-08-19 06:11:01,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:11:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-19 06:11:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-19 06:11:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-19 06:11:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-19 06:11:01,497 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-19 06:11:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:11:01,497 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-19 06:11:01,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:11:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-19 06:11:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 06:11:01,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:11:01,507 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] [2020-08-19 06:11:01,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:11:01,507 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:11:01,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:11:01,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-19 06:11:01,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:11:01,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238303190] [2020-08-19 06:11:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:11:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:01,894 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:11:01,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:11:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:11:01,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238303190] [2020-08-19 06:11:01,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:11:01,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:11:01,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159595562] [2020-08-19 06:11:01,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:11:01,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:11:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:11:01,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:11:01,958 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-19 06:11:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:11:05,315 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-19 06:11:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:11:05,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-19 06:11:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:11:05,338 INFO L225 Difference]: With dead ends: 16495 [2020-08-19 06:11:05,338 INFO L226 Difference]: Without dead ends: 10615 [2020-08-19 06:11:05,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:11:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-19 06:11:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-19 06:11:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-19 06:11:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-19 06:11:05,746 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-19 06:11:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:11:05,746 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-19 06:11:05,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:11:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-19 06:11:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 06:11:05,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:11:05,761 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] [2020-08-19 06:11:05,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:11:05,761 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:11:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:11:05,762 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-19 06:11:05,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:11:05,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608692764] [2020-08-19 06:11:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:11:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:06,098 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:11:06,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:11:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:11:06,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608692764] [2020-08-19 06:11:06,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:11:06,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:11:06,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002454638] [2020-08-19 06:11:06,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:11:06,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:11:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:11:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:11:06,238 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-19 06:11:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:11:08,489 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-19 06:11:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:11:08,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-19 06:11:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:11:08,512 INFO L225 Difference]: With dead ends: 21564 [2020-08-19 06:11:08,512 INFO L226 Difference]: Without dead ends: 10851 [2020-08-19 06:11:08,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:11:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-19 06:11:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-19 06:11:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-19 06:11:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-19 06:11:09,063 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-19 06:11:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:11:09,064 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-19 06:11:09,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:11:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-19 06:11:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 06:11:09,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:11:09,076 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] [2020-08-19 06:11:09,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:11:09,076 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:11:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:11:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-19 06:11:09,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:11:09,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358931154] [2020-08-19 06:11:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:11:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:09,426 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:11:09,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:11:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:11:09,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358931154] [2020-08-19 06:11:09,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:11:09,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:11:09,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45093360] [2020-08-19 06:11:09,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:11:09,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:11:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:11:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:11:09,488 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-19 06:11:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:11:12,747 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-19 06:11:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:11:12,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-19 06:11:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:11:12,765 INFO L225 Difference]: With dead ends: 15230 [2020-08-19 06:11:12,765 INFO L226 Difference]: Without dead ends: 10851 [2020-08-19 06:11:12,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:11:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-19 06:11:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-19 06:11:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-19 06:11:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-19 06:11:13,242 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-19 06:11:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:11:13,242 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-19 06:11:13,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:11:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-19 06:11:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-19 06:11:13,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:11:13,254 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] [2020-08-19 06:11:13,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:11:13,254 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:11:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:11:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-19 06:11:13,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:11:13,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462003965] [2020-08-19 06:11:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:11:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:14,135 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:11:14,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:11:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:11:14,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462003965] [2020-08-19 06:11:14,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:11:14,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:11:14,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212840950] [2020-08-19 06:11:14,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:11:14,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:11:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:11:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:11:14,180 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-19 06:11:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:11:17,822 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-19 06:11:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:11:17,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-19 06:11:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:11:17,849 INFO L225 Difference]: With dead ends: 25409 [2020-08-19 06:11:17,849 INFO L226 Difference]: Without dead ends: 21030 [2020-08-19 06:11:17,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:11:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-19 06:11:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-19 06:11:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-19 06:11:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-19 06:11:18,371 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-19 06:11:18,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:11:18,371 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-19 06:11:18,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:11:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-19 06:11:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 06:11:18,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:11:18,383 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] [2020-08-19 06:11:18,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:11:18,383 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:11:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:11:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-19 06:11:18,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:11:18,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434854194] [2020-08-19 06:11:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:11:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:18,747 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:11:18,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:11:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:11:18,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434854194] [2020-08-19 06:11:18,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:11:18,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:11:18,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683051496] [2020-08-19 06:11:18,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:11:18,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:11:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:11:18,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:11:18,800 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-19 06:11:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:11:21,982 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-19 06:11:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:11:21,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-19 06:11:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:11:22,001 INFO L225 Difference]: With dead ends: 30843 [2020-08-19 06:11:22,001 INFO L226 Difference]: Without dead ends: 20313 [2020-08-19 06:11:22,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:11:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-19 06:11:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-19 06:11:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-19 06:11:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-19 06:11:22,767 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-19 06:11:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:11:22,767 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-19 06:11:22,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:11:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-19 06:11:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 06:11:22,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:11:22,781 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] [2020-08-19 06:11:22,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:11:22,782 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:11:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:11:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-19 06:11:22,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:11:22,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18281233] [2020-08-19 06:11:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:11:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:23,140 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 06:11:23,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:11:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:11:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:11:23,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18281233] [2020-08-19 06:11:23,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:11:23,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:11:23,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91448558] [2020-08-19 06:11:23,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:11:23,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:11:23,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:11:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:11:23,228 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states.