/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:07:27,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 13:07:27,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 13:07:28,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 13:07:28,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 13:07:28,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 13:07:28,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 13:07:28,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 13:07:28,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 13:07:28,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 13:07:28,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 13:07:28,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 13:07:28,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:07:28,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:07:28,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:07:28,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:07:28,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:07:28,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:07:28,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:07:28,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:07:28,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:07:28,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:07:28,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:07:28,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:07:28,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 13:07:28,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 13:07:28,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 13:07:28,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 13:07:28,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 13:07:28,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 13:07:28,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 13:07:28,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 13:07:28,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 13:07:28,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:07:28,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:07:28,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:07:28,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 13:07:28,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:07:28,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:07:28,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:07:28,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:07:28,131 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:07:28,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:07:28,132 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:07:28,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:07:28,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:07:28,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:07:28,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:07:28,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:07:28,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:07:28,134 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:07:28,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:07:28,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:07:28,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:07:28,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:07:28,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:07:28,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:07:28,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:07:28,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:07:28,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:07:28,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:07:28,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:07:28,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:07:28,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:07:28,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:07:28,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:07:28,137 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:07:28,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:07:28,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:07:28,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:07:28,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:07:28,439 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:07:28,440 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 13:07:28,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/026c35b49/6f5244d6aea64a7c9a645156163a826d/FLAG1a2f94188 [2020-08-18 13:07:29,216 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:07:29,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 13:07:29,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/026c35b49/6f5244d6aea64a7c9a645156163a826d/FLAG1a2f94188 [2020-08-18 13:07:29,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/026c35b49/6f5244d6aea64a7c9a645156163a826d [2020-08-18 13:07:29,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:07:29,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:07:29,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:07:29,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:07:29,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:07:29,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:07:29" (1/1) ... [2020-08-18 13:07:29,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b302c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:29, skipping insertion in model container [2020-08-18 13:07:29,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:07:29" (1/1) ... [2020-08-18 13:07:29,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:07:29,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:07:30,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:07:30,901 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:07:31,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:07:31,949 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:07:31,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31 WrapperNode [2020-08-18 13:07:31,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:07:31,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:07:31,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:07:31,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:07:31,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:31,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:32,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:32,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:32,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:32,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:32,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... [2020-08-18 13:07:32,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:07:32,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:07:32,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:07:32,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:07:32,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:07:32,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:07:32,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:07:32,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 13:07:32,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:07:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:07:32,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 13:07:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 13:07:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 13:07:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 13:07:32,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 13:07:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 13:07:32,264 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 13:07:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 13:07:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 13:07:32,265 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 13:07:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 13:07:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 13:07:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 13:07:32,266 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 13:07:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:07:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:07:32,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:07:35,441 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:07:35,442 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 13:07:35,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:35 BoogieIcfgContainer [2020-08-18 13:07:35,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:07:35,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:07:35,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:07:35,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:07:35,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:07:29" (1/3) ... [2020-08-18 13:07:35,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229e053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:35, skipping insertion in model container [2020-08-18 13:07:35,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:31" (2/3) ... [2020-08-18 13:07:35,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229e053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:35, skipping insertion in model container [2020-08-18 13:07:35,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:35" (3/3) ... [2020-08-18 13:07:35,463 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 13:07:35,475 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:07:35,485 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-08-18 13:07:35,501 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-08-18 13:07:35,532 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:07:35,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:07:35,533 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:07:35,533 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:07:35,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:07:35,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:07:35,534 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:07:35,534 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:07:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-08-18 13:07:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 13:07:35,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:35,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:35,608 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:35,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:35,617 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-08-18 13:07:35,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:35,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572762681] [2020-08-18 13:07:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:37,336 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-18 13:07:37,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:37,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572762681] [2020-08-18 13:07:37,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:37,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:37,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830929570] [2020-08-18 13:07:37,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:37,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:37,576 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 4 states. [2020-08-18 13:07:38,130 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-18 13:07:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:45,576 INFO L93 Difference]: Finished difference Result 1794 states and 3183 transitions. [2020-08-18 13:07:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:45,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 13:07:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:45,614 INFO L225 Difference]: With dead ends: 1794 [2020-08-18 13:07:45,615 INFO L226 Difference]: Without dead ends: 1483 [2020-08-18 13:07:45,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-08-18 13:07:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2020-08-18 13:07:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-08-18 13:07:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions. [2020-08-18 13:07:45,774 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327 [2020-08-18 13:07:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:45,776 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions. [2020-08-18 13:07:45,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions. [2020-08-18 13:07:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 13:07:45,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:45,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:45,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:07:45,784 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times [2020-08-18 13:07:45,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:45,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318842347] [2020-08-18 13:07:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:47,062 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-18 13:07:47,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:47,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318842347] [2020-08-18 13:07:47,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:47,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:47,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753306209] [2020-08-18 13:07:47,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:47,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:47,378 INFO L87 Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states. [2020-08-18 13:07:48,052 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-18 13:07:54,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:07:54,790 INFO L93 Difference]: Finished difference Result 2844 states and 4401 transitions. [2020-08-18 13:07:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:07:54,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 13:07:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:07:54,816 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 13:07:54,817 INFO L226 Difference]: Without dead ends: 2425 [2020-08-18 13:07:54,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:07:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-08-18 13:07:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423. [2020-08-18 13:07:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-08-18 13:07:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions. [2020-08-18 13:07:54,899 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327 [2020-08-18 13:07:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:07:54,900 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions. [2020-08-18 13:07:54,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:07:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions. [2020-08-18 13:07:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 13:07:54,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:07:54,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:07:54,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:07:54,909 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:07:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:07:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times [2020-08-18 13:07:54,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:07:54,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428140972] [2020-08-18 13:07:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:07:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:55,823 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-18 13:07:55,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:07:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:07:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:07:55,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428140972] [2020-08-18 13:07:55,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:07:55,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:07:55,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879351648] [2020-08-18 13:07:55,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:07:55,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:07:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:07:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:07:55,973 INFO L87 Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states. [2020-08-18 13:07:56,570 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2020-08-18 13:08:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:08:03,110 INFO L93 Difference]: Finished difference Result 5038 states and 7854 transitions. [2020-08-18 13:08:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:08:03,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-18 13:08:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:08:03,133 INFO L225 Difference]: With dead ends: 5038 [2020-08-18 13:08:03,134 INFO L226 Difference]: Without dead ends: 4361 [2020-08-18 13:08:03,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:08:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2020-08-18 13:08:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359. [2020-08-18 13:08:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-08-18 13:08:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions. [2020-08-18 13:08:03,265 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327 [2020-08-18 13:08:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:08:03,266 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions. [2020-08-18 13:08:03,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:08:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions. [2020-08-18 13:08:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-18 13:08:03,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:08:03,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:08:03,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:08:03,283 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:08:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:08:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times [2020-08-18 13:08:03,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:08:03,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288400113] [2020-08-18 13:08:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:08:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:04,483 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-18 13:08:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:08:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:08:04,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288400113] [2020-08-18 13:08:04,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:08:04,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 13:08:04,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541395924] [2020-08-18 13:08:04,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:08:04,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:08:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:08:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:08:04,667 INFO L87 Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states. [2020-08-18 13:08:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:08:14,386 INFO L93 Difference]: Finished difference Result 12898 states and 19904 transitions. [2020-08-18 13:08:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:08:14,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-08-18 13:08:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:08:14,425 INFO L225 Difference]: With dead ends: 12898 [2020-08-18 13:08:14,426 INFO L226 Difference]: Without dead ends: 8554 [2020-08-18 13:08:14,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:08:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8554 states. [2020-08-18 13:08:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347. [2020-08-18 13:08:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8347 states. [2020-08-18 13:08:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions. [2020-08-18 13:08:14,751 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327 [2020-08-18 13:08:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:08:14,751 INFO L479 AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions. [2020-08-18 13:08:14,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:08:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions. [2020-08-18 13:08:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-18 13:08:14,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:08:14,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:08:14,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:08:14,772 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:08:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:08:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times [2020-08-18 13:08:14,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:08:14,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378688443] [2020-08-18 13:08:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:08:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:15,588 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-18 13:08:15,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:08:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:08:15,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378688443] [2020-08-18 13:08:15,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:08:15,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:08:15,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733847179] [2020-08-18 13:08:15,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:08:15,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:08:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:08:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:08:15,748 INFO L87 Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states. [2020-08-18 13:08:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:08:26,776 INFO L93 Difference]: Finished difference Result 24596 states and 37840 transitions. [2020-08-18 13:08:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 13:08:26,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-08-18 13:08:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:08:26,833 INFO L225 Difference]: With dead ends: 24596 [2020-08-18 13:08:26,833 INFO L226 Difference]: Without dead ends: 16378 [2020-08-18 13:08:26,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:08:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2020-08-18 13:08:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 16171. [2020-08-18 13:08:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16171 states. [2020-08-18 13:08:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 24823 transitions. [2020-08-18 13:08:27,404 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 24823 transitions. Word has length 329 [2020-08-18 13:08:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:08:27,404 INFO L479 AbstractCegarLoop]: Abstraction has 16171 states and 24823 transitions. [2020-08-18 13:08:27,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 13:08:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 24823 transitions. [2020-08-18 13:08:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-18 13:08:27,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:08:27,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:08:27,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:08:27,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:08:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:08:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1871319948, now seen corresponding path program 1 times [2020-08-18 13:08:27,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:08:27,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821546912] [2020-08-18 13:08:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:08:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:28,079 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-08-18 13:08:28,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:08:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:08:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:08:28,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821546912] [2020-08-18 13:08:28,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:08:28,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:08:28,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126966238] [2020-08-18 13:08:28,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 13:08:28,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:08:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 13:08:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 13:08:28,177 INFO L87 Difference]: Start difference. First operand 16171 states and 24823 transitions. Second operand 4 states.