/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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:33:06,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:33:06,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:33:06,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:33:06,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:33:06,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:33:06,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:33:06,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:33:06,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:33:06,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:33:06,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:33:06,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:33:06,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:33:06,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:33:06,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:33:06,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:33:06,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:33:06,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:33:06,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:33:06,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:33:06,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:33:06,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:33:06,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:33:06,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:33:06,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:33:06,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:33:06,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:33:06,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:33:06,973 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:33:06,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:33:06,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:33:07,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:33:07,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:33:07,001 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:33:07,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:33:07,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:33:07,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:33:07,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:33:07,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:33:07,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:33:07,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:33:07,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:33:07,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:33:07,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:33:07,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:33:07,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:33:07,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:33:07,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:33:07,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:33:07,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:33:07,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:33:07,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:33:07,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:33:07,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:33:07,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:33:07,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:33:07,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:33:07,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:33:07,006 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 [2020-09-21 10:33:07,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:33:07,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:33:07,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:33:07,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:33:07,472 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:33:07,474 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 10:33:07,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3d7d886/2b233450caf0421ebf0aa6049e387fc0/FLAG41e0b6ee9 [2020-09-21 10:33:08,389 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:33:08,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 10:33:08,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3d7d886/2b233450caf0421ebf0aa6049e387fc0/FLAG41e0b6ee9 [2020-09-21 10:33:08,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b3d7d886/2b233450caf0421ebf0aa6049e387fc0 [2020-09-21 10:33:08,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:33:08,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:33:08,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:33:08,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:33:08,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:33:08,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:33:08" (1/1) ... [2020-09-21 10:33:08,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a765448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:08, skipping insertion in model container [2020-09-21 10:33:08,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:33:08" (1/1) ... [2020-09-21 10:33:08,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:33:08,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:33:10,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:33:10,624 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:33:11,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:33:11,736 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:33:11,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11 WrapperNode [2020-09-21 10:33:11,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:33:11,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:33:11,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:33:11,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:33:11,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... [2020-09-21 10:33:11,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:33:11,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:33:11,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:33:11,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:33:11,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:33:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:33:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:33:12,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:33:12,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:33:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:33:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:33:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 10:33:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 10:33:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 10:33:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:33:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:33:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 10:33:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 10:33:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 10:33:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 10:33:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 10:33:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 10:33:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 10:33:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 10:33:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 10:33:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:33:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:33:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:33:17,019 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:33:17,020 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:33:17,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:33:17 BoogieIcfgContainer [2020-09-21 10:33:17,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:33:17,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:33:17,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:33:17,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:33:17,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:33:08" (1/3) ... [2020-09-21 10:33:17,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d025b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:33:17, skipping insertion in model container [2020-09-21 10:33:17,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:11" (2/3) ... [2020-09-21 10:33:17,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d025b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:33:17, skipping insertion in model container [2020-09-21 10:33:17,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:33:17" (3/3) ... [2020-09-21 10:33:17,046 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 10:33:17,057 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:33:17,069 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-21 10:33:17,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-21 10:33:17,128 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:33:17,128 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:33:17,128 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:33:17,129 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:33:17,129 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:33:17,129 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:33:17,129 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:33:17,129 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:33:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-09-21 10:33:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-09-21 10:33:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:17,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:33:17,228 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:17,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-09-21 10:33:17,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:17,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319490192] [2020-09-21 10:33:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:21,491 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-21 10:33:21,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:33:22,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319490192] [2020-09-21 10:33:22,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:22,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:33:22,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37568890] [2020-09-21 10:33:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:33:22,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:22,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:33:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:33:22,181 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2020-09-21 10:33:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:40,928 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-09-21 10:33:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:33:40,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-09-21 10:33:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:40,982 INFO L225 Difference]: With dead ends: 4460 [2020-09-21 10:33:40,982 INFO L226 Difference]: Without dead ends: 2963 [2020-09-21 10:33:40,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:33:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-09-21 10:33:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-09-21 10:33:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-09-21 10:33:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-09-21 10:33:41,244 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-09-21 10:33:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:33:41,246 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-09-21 10:33:41,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:33:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-09-21 10:33:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-09-21 10:33:41,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:41,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:33:41,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:33:41,264 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-09-21 10:33:41,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:41,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998964352] [2020-09-21 10:33:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:43,177 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 400 [2020-09-21 10:33:43,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:33:43,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998964352] [2020-09-21 10:33:43,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:43,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:33:43,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74761031] [2020-09-21 10:33:43,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:33:43,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:33:43,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:43,679 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2020-09-21 10:34:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:34:05,623 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-09-21 10:34:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:34:05,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-09-21 10:34:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:34:05,653 INFO L225 Difference]: With dead ends: 8439 [2020-09-21 10:34:05,653 INFO L226 Difference]: Without dead ends: 5747 [2020-09-21 10:34:05,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:34:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states.