/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:38:52,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:38:52,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:38:52,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:38:52,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:38:52,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:38:52,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:38:52,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:38:52,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:38:52,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:38:52,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:38:52,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:38:52,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:38:52,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:38:52,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:38:52,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:38:52,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:38:52,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:38:52,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:38:52,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:38:52,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:38:52,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:38:52,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:38:52,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:38:52,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:38:52,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:38:52,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:38:52,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:38:52,096 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 15:38:52,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:38:52,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:38:52,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:38:52,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:38:52,124 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:38:52,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:38:52,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:38:52,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:38:52,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:38:52,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:38:52,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:38:52,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:38:52,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:38:52,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:38:52,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:38:52,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:38:52,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:38:52,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:38:52,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:38:52,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:38:52,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:38:52,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:38:52,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:38:52,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:38:52,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:38:52,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:38:52,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:38:52,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:38:52,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:38:52,131 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 -> false [2020-08-18 15:38:52,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:38:52,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:38:52,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:38:52,510 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:38:52,510 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:38:52,511 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-18 15:38:52,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb4fb464f/1649ce2bc0f44958ac1d71ef8846bfa9/FLAG13a65c23a [2020-08-18 15:38:53,220 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:38:53,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-18 15:38:53,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb4fb464f/1649ce2bc0f44958ac1d71ef8846bfa9/FLAG13a65c23a [2020-08-18 15:38:53,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb4fb464f/1649ce2bc0f44958ac1d71ef8846bfa9 [2020-08-18 15:38:53,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:38:53,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:38:53,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:38:53,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:38:53,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:38:53,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:38:53" (1/1) ... [2020-08-18 15:38:53,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1604f3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:53, skipping insertion in model container [2020-08-18 15:38:53,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:38:53" (1/1) ... [2020-08-18 15:38:53,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:38:53,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:38:54,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:38:54,769 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:38:55,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:38:55,280 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:38:55,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55 WrapperNode [2020-08-18 15:38:55,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:38:55,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:38:55,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:38:55,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:38:55,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... [2020-08-18 15:38:55,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:38:55,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:38:55,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:38:55,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:38:55,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:38:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:38:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:38:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 15:38:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:38:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:38:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 15:38:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 15:38:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 15:38:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 15:38:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 15:38:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 15:38:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 15:38:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 15:38:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 15:38:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 15:38:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 15:38:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 15:38:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 15:38:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 15:38:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:38:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:38:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:38:58,352 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:38:58,352 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:38:58,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:38:58 BoogieIcfgContainer [2020-08-18 15:38:58,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:38:58,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:38:58,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:38:58,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:38:58,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:38:53" (1/3) ... [2020-08-18 15:38:58,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7031da30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:38:58, skipping insertion in model container [2020-08-18 15:38:58,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:55" (2/3) ... [2020-08-18 15:38:58,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7031da30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:38:58, skipping insertion in model container [2020-08-18 15:38:58,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:38:58" (3/3) ... [2020-08-18 15:38:58,372 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-18 15:38:58,383 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:38:58,393 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:38:58,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:38:58,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:38:58,436 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:38:58,436 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:38:58,437 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:38:58,437 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:38:58,437 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:38:58,437 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:38:58,437 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:38:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-08-18 15:38:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 15:38:58,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:38:58,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:38:58,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:38:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:38:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-08-18 15:38:58,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:38:58,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117592638] [2020-08-18 15:38:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:38:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:00,184 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 15:39:00,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:00,361 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 15:39:00,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117592638] [2020-08-18 15:39:00,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:00,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:39:00,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594739276] [2020-08-18 15:39:00,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:39:00,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:00,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:39:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:00,385 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-08-18 15:39:00,901 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-18 15:39:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:05,895 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-08-18 15:39:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:39:05,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-18 15:39:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:05,941 INFO L225 Difference]: With dead ends: 1527 [2020-08-18 15:39:05,942 INFO L226 Difference]: Without dead ends: 1311 [2020-08-18 15:39:05,952 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 15:39:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-08-18 15:39:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-08-18 15:39:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-08-18 15:39:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-08-18 15:39:06,102 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-08-18 15:39:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:39:06,104 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-08-18 15:39:06,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:39:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-08-18 15:39:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 15:39:06,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:06,115 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, 1] [2020-08-18 15:39:06,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:39:06,116 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:06,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-08-18 15:39:06,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:06,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546648870] [2020-08-18 15:39:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:06,945 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 15:39:06,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:07,262 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 15:39:07,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546648870] [2020-08-18 15:39:07,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:07,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:39:07,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976230497] [2020-08-18 15:39:07,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:39:07,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:07,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:39:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:07,268 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-08-18 15:39:07,889 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-18 15:39:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:12,554 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-08-18 15:39:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:39:12,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-18 15:39:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:12,570 INFO L225 Difference]: With dead ends: 2683 [2020-08-18 15:39:12,570 INFO L226 Difference]: Without dead ends: 2301 [2020-08-18 15:39:12,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:39:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-08-18 15:39:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-08-18 15:39:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-08-18 15:39:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-08-18 15:39:12,668 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-08-18 15:39:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:39:12,670 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-08-18 15:39:12,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:39:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-08-18 15:39:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 15:39:12,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:12,680 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, 1] [2020-08-18 15:39:12,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:39:12,684 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-08-18 15:39:12,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:12,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669170057] [2020-08-18 15:39:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:13,476 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 15:39:13,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:39:13,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669170057] [2020-08-18 15:39:13,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:13,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:39:13,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105626205] [2020-08-18 15:39:13,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:39:13,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:39:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:13,659 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-08-18 15:39:14,075 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-18 15:39:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:18,915 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-08-18 15:39:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:39:18,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-18 15:39:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:18,937 INFO L225 Difference]: With dead ends: 4867 [2020-08-18 15:39:18,937 INFO L226 Difference]: Without dead ends: 4201 [2020-08-18 15:39:18,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:39:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-08-18 15:39:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-08-18 15:39:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-08-18 15:39:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-08-18 15:39:19,074 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-08-18 15:39:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:39:19,075 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-08-18 15:39:19,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:39:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-08-18 15:39:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-18 15:39:19,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:19,088 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, 1] [2020-08-18 15:39:19,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:39:19,088 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-08-18 15:39:19,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:19,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629120288] [2020-08-18 15:39:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:20,100 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 15:39:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:20,250 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 15:39:20,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629120288] [2020-08-18 15:39:20,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:20,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:39:20,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864082807] [2020-08-18 15:39:20,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:39:20,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:39:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:39:20,254 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-08-18 15:39:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:27,515 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-08-18 15:39:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:39:27,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-18 15:39:27,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:27,554 INFO L225 Difference]: With dead ends: 12414 [2020-08-18 15:39:27,554 INFO L226 Difference]: Without dead ends: 8230 [2020-08-18 15:39:27,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:39:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-08-18 15:39:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-08-18 15:39:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-08-18 15:39:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-08-18 15:39:27,875 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-08-18 15:39:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:39:27,875 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-08-18 15:39:27,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:39:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-08-18 15:39:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-18 15:39:27,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:27,896 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, 1, 1, 1] [2020-08-18 15:39:27,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:39:27,896 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-08-18 15:39:27,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:27,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503423247] [2020-08-18 15:39:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:28,622 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 15:39:28,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:28,839 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 15:39:28,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503423247] [2020-08-18 15:39:28,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:28,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:39:28,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492144094] [2020-08-18 15:39:28,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:39:28,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:28,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:39:28,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:28,842 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-08-18 15:39:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:36,708 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-08-18 15:39:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 15:39:36,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-18 15:39:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:36,768 INFO L225 Difference]: With dead ends: 24233 [2020-08-18 15:39:36,768 INFO L226 Difference]: Without dead ends: 16134 [2020-08-18 15:39:36,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-08-18 15:39:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-08-18 15:39:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-08-18 15:39:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-08-18 15:39:37,274 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-08-18 15:39:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:39:37,275 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-08-18 15:39:37,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:39:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-08-18 15:39:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-18 15:39:37,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:37,307 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, 1, 1, 1] [2020-08-18 15:39:37,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:39:37,308 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-08-18 15:39:37,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:37,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491300574] [2020-08-18 15:39:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:37,832 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-18 15:39:37,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:37,927 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 15:39:37,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491300574] [2020-08-18 15:39:37,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:37,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:39:37,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586480240] [2020-08-18 15:39:37,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:39:37,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:37,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:39:37,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:37,930 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-08-18 15:39:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:47,428 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-08-18 15:39:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 15:39:47,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-18 15:39:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:47,501 INFO L225 Difference]: With dead ends: 48321 [2020-08-18 15:39:47,501 INFO L226 Difference]: Without dead ends: 32231 [2020-08-18 15:39:47,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states.