/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:46:31,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:46:31,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:46:31,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 00:46:31,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:46:31,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:46:31,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:46:31,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:46:31,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:46:31,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:46:31,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:46:31,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:46:31,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:46:31,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:46:31,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:46:31,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:46:32,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:46:32,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:46:32,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:46:32,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:46:32,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 00:46:32,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:46:32,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:46:32,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:46:32,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:46:32,034 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:46:32,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:46:32,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:46:32,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:46:32,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:46:32,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:46:32,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:46:32,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:46:32,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:46:32,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:46:32,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:46:32,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:46:32,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:46:32,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:46:32,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:46:32,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:46:32,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:46:32,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:46:32,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:46:32,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:46:32,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:46:32,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:46:32,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:46:32,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:46:32,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:46:32,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:46:32,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:46:32,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:46:32,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:46:32,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:46:32,357 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:46:32,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 00:46:32,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73b221502/b4fda4aeb08f488b8048ef6189022f4a/FLAG38cc280ae [2020-08-22 00:46:33,045 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:46:33,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 00:46:33,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73b221502/b4fda4aeb08f488b8048ef6189022f4a/FLAG38cc280ae [2020-08-22 00:46:33,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73b221502/b4fda4aeb08f488b8048ef6189022f4a [2020-08-22 00:46:33,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:46:33,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:46:33,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:46:33,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:46:33,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:46:33,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:46:33" (1/1) ... [2020-08-22 00:46:33,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363f8acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:33, skipping insertion in model container [2020-08-22 00:46:33,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:46:33" (1/1) ... [2020-08-22 00:46:33,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:46:33,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:46:34,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:46:34,476 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:46:34,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:46:34,940 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:46:34,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34 WrapperNode [2020-08-22 00:46:34,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:46:34,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:46:34,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:46:34,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:46:34,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:34,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... [2020-08-22 00:46:35,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:46:35,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:46:35,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:46:35,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:46:35,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:46:35,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:46:35,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:46:35,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 00:46:35,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:46:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:46:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 00:46:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 00:46:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 00:46:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 00:46:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 00:46:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 00:46:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 00:46:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 00:46:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 00:46:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 00:46:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 00:46:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 00:46:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 00:46:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 00:46:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:46:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:46:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:46:37,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:46:37,736 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 00:46:37,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:46:37 BoogieIcfgContainer [2020-08-22 00:46:37,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:46:37,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:46:37,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:46:37,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:46:37,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:46:33" (1/3) ... [2020-08-22 00:46:37,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597290c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:46:37, skipping insertion in model container [2020-08-22 00:46:37,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:46:34" (2/3) ... [2020-08-22 00:46:37,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597290c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:46:37, skipping insertion in model container [2020-08-22 00:46:37,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:46:37" (3/3) ... [2020-08-22 00:46:37,768 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 00:46:37,778 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:46:37,792 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:46:37,806 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:46:37,834 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:46:37,834 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:46:37,834 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:46:37,834 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:46:37,834 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:46:37,835 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:46:37,835 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:46:37,835 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:46:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-22 00:46:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 00:46:37,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:37,897 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] [2020-08-22 00:46:37,898 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:37,904 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-22 00:46:37,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:37,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192524461] [2020-08-22 00:46:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:39,536 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:46:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:39,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192524461] [2020-08-22 00:46:39,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:39,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:39,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10368949] [2020-08-22 00:46:39,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:39,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:39,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:39,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:39,761 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-22 00:46:40,196 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 00:46:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:44,891 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-22 00:46:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:44,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 00:46:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:44,935 INFO L225 Difference]: With dead ends: 1489 [2020-08-22 00:46:44,935 INFO L226 Difference]: Without dead ends: 1273 [2020-08-22 00:46:44,943 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 [2020-08-22 00:46:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-22 00:46:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-22 00:46:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-22 00:46:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-22 00:46:45,104 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-22 00:46:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:45,110 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-22 00:46:45,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:46:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-22 00:46:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 00:46:45,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:45,123 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] [2020-08-22 00:46:45,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:46:45,123 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-22 00:46:45,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:45,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106740092] [2020-08-22 00:46:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:46,037 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:46:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:46,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106740092] [2020-08-22 00:46:46,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:46,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:46,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916035711] [2020-08-22 00:46:46,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:46,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:46,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:46,339 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-22 00:46:47,021 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 00:46:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:50,952 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-22 00:46:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:50,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 00:46:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:50,974 INFO L225 Difference]: With dead ends: 2607 [2020-08-22 00:46:50,975 INFO L226 Difference]: Without dead ends: 2225 [2020-08-22 00:46:50,984 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 [2020-08-22 00:46:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-22 00:46:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-22 00:46:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-22 00:46:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-22 00:46:51,128 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-22 00:46:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:51,129 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-22 00:46:51,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:46:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-22 00:46:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 00:46:51,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:51,151 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] [2020-08-22 00:46:51,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:46:51,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-22 00:46:51,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:51,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807520456] [2020-08-22 00:46:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:52,273 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:46:52,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807520456] [2020-08-22 00:46:52,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:52,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:46:52,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403495574] [2020-08-22 00:46:52,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:46:52,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:46:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:46:52,562 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-22 00:46:52,984 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 00:46:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:46:56,639 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-22 00:46:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:46:56,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 00:46:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:46:56,661 INFO L225 Difference]: With dead ends: 4715 [2020-08-22 00:46:56,661 INFO L226 Difference]: Without dead ends: 4049 [2020-08-22 00:46:56,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-22 00:46:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-22 00:46:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-22 00:46:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-22 00:46:56,796 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-22 00:46:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:46:56,797 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-22 00:46:56,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:46:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-22 00:46:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 00:46:56,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:46:56,808 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] [2020-08-22 00:46:56,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:46:56,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:46:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:46:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-22 00:46:56,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:46:56,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640018755] [2020-08-22 00:46:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:46:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:57,734 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:46:57,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:46:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:46:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:46:57,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640018755] [2020-08-22 00:46:57,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:46:57,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:46:57,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86048629] [2020-08-22 00:46:57,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:46:57,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:46:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:46:57,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:46:57,899 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-22 00:47:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:47:04,492 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-22 00:47:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:47:04,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-22 00:47:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:47:04,532 INFO L225 Difference]: With dead ends: 11998 [2020-08-22 00:47:04,532 INFO L226 Difference]: Without dead ends: 7966 [2020-08-22 00:47:04,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:47:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-22 00:47:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-22 00:47:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-22 00:47:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-22 00:47:04,832 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-22 00:47:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:47:04,832 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-22 00:47:04,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:47:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-22 00:47:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 00:47:04,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:47:04,847 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] [2020-08-22 00:47:04,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:47:04,848 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:47:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:47:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-22 00:47:04,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:47:04,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159149804] [2020-08-22 00:47:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:47:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:05,571 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:47:05,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:47:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:47:05,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159149804] [2020-08-22 00:47:05,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:47:05,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:47:05,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120051495] [2020-08-22 00:47:05,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:47:05,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:47:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:47:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:05,748 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-22 00:47:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:47:13,081 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-22 00:47:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:47:13,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 00:47:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:47:13,135 INFO L225 Difference]: With dead ends: 23441 [2020-08-22 00:47:13,135 INFO L226 Difference]: Without dead ends: 15606 [2020-08-22 00:47:13,152 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 [2020-08-22 00:47:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-22 00:47:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-22 00:47:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-22 00:47:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-22 00:47:13,702 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-22 00:47:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:47:13,703 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-22 00:47:13,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:47:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-22 00:47:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 00:47:13,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:47:13,730 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] [2020-08-22 00:47:13,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:47:13,730 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:47:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:47:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-22 00:47:13,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:47:13,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201587405] [2020-08-22 00:47:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:47:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:14,208 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:47:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:47:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:47:14,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201587405] [2020-08-22 00:47:14,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:47:14,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:47:14,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695679237] [2020-08-22 00:47:14,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:47:14,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:47:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:47:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:14,320 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-22 00:47:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:47:21,974 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-22 00:47:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:47:21,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 00:47:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:47:22,037 INFO L225 Difference]: With dead ends: 46737 [2020-08-22 00:47:22,038 INFO L226 Difference]: Without dead ends: 31175 [2020-08-22 00:47:22,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-22 00:47:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-22 00:47:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-22 00:47:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-22 00:47:22,942 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-22 00:47:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:47:22,942 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-22 00:47:22,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:47:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-22 00:47:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 00:47:22,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:47:22,963 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] [2020-08-22 00:47:22,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:47:22,964 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:47:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:47:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-22 00:47:22,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:47:22,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174281661] [2020-08-22 00:47:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:47:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:23,426 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 00:47:23,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:47:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:47:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:47:23,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174281661] [2020-08-22 00:47:23,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:47:23,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:47:23,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561079304] [2020-08-22 00:47:23,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:47:23,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:47:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:47:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:47:23,515 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states.