/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:33:11,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:33:11,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:33:11,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:33:11,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:33:11,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:33:11,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:33:11,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:33:11,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:33:11,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:33:11,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:33:11,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:33:11,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:33:11,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:33:11,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:33:11,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:33:11,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:33:11,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:33:11,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:33:11,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:33:11,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:33:11,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:33:11,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:33:11,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:33:11,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:33:11,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:33:11,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:33:11,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:33:11,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:33:11,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:33:11,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:33:11,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:33:11,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:33:11,184 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 10:33:11,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:33:11,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:33:11,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:33:11,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:33:11,237 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:33:11,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:33:11,238 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:33:11,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:33:11,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:33:11,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:33:11,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:33:11,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:33:11,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:33:11,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:33:11,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:33:11,240 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:33:11,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:33:11,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:33:11,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:33:11,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:33:11,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:33:11,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:33:11,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:33:11,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:33:11,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:33:11,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:33:11,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:33:11,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:33:11,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:33:11,244 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 10:33:11,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:33:11,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:33:11,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:33:11,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:33:11,722 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:33:11,723 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-09-21 10:33:11,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49973496/ed402978140440dfbd55dce447d9ac3d/FLAG735f27a6d [2020-09-21 10:33:12,600 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:33:12,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-09-21 10:33:12,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49973496/ed402978140440dfbd55dce447d9ac3d/FLAG735f27a6d [2020-09-21 10:33:12,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49973496/ed402978140440dfbd55dce447d9ac3d [2020-09-21 10:33:12,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:33:12,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:33:12,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:33:12,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:33:12,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:33:12,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:33:12" (1/1) ... [2020-09-21 10:33:12,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f61d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:12, skipping insertion in model container [2020-09-21 10:33:12,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:33:12" (1/1) ... [2020-09-21 10:33:12,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:33:12,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:33:15,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:33:15,509 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:33:17,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:33:17,623 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:33:17,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17 WrapperNode [2020-09-21 10:33:17,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:33:17,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:33:17,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:33:17,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:33:17,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (1/1) ... [2020-09-21 10:33:17,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:33:17,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:33:17,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:33:17,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:33:17,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (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 10:33:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:33:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:33:18,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:33:18,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:33:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:33:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:33:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 10:33:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 10:33:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:33:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:33:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 10:33:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 10:33:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 10:33:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 10:33:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 10:33:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 10:33:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 10:33:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 10:33:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 10:33:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:33:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:33:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:33:24,204 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:33:24,204 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:33:24,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:33:24 BoogieIcfgContainer [2020-09-21 10:33:24,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:33:24,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:33:24,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:33:24,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:33:24,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:33:12" (1/3) ... [2020-09-21 10:33:24,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759db20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:33:24, skipping insertion in model container [2020-09-21 10:33:24,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:33:17" (2/3) ... [2020-09-21 10:33:24,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759db20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:33:24, skipping insertion in model container [2020-09-21 10:33:24,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:33:24" (3/3) ... [2020-09-21 10:33:24,235 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-09-21 10:33:24,246 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:33:24,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-21 10:33:24,284 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-21 10:33:24,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:33:24,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:33:24,322 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:33:24,323 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:33:24,323 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:33:24,323 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:33:24,323 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:33:24,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:33:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-09-21 10:33:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-09-21 10:33:24,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:24,422 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] [2020-09-21 10:33:24,423 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-09-21 10:33:24,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:24,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738443857] [2020-09-21 10:33:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:26,700 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 409 [2020-09-21 10:33:26,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:27,032 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 10:33:27,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738443857] [2020-09-21 10:33:27,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:27,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:33:27,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305355889] [2020-09-21 10:33:27,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:33:27,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:33:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:33:27,070 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 5 states. [2020-09-21 10:33:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:33:44,661 INFO L93 Difference]: Finished difference Result 4483 states and 7776 transitions. [2020-09-21 10:33:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:33:44,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-09-21 10:33:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:33:44,713 INFO L225 Difference]: With dead ends: 4483 [2020-09-21 10:33:44,714 INFO L226 Difference]: Without dead ends: 2511 [2020-09-21 10:33:44,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:33:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-09-21 10:33:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-09-21 10:33:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-09-21 10:33:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4317 transitions. [2020-09-21 10:33:44,969 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4317 transitions. Word has length 322 [2020-09-21 10:33:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:33:44,972 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4317 transitions. [2020-09-21 10:33:44,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:33:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4317 transitions. [2020-09-21 10:33:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-09-21 10:33:44,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:33:44,996 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] [2020-09-21 10:33:44,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:33:44,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:33:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:33:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1448784548, now seen corresponding path program 1 times [2020-09-21 10:33:44,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:33:44,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061755406] [2020-09-21 10:33:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:33:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:46,756 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 409 [2020-09-21 10:33:46,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:33:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:33:47,106 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 10:33:47,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061755406] [2020-09-21 10:33:47,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:33:47,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:33:47,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129270698] [2020-09-21 10:33:47,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:33:47,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:33:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:33:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:33:47,113 INFO L87 Difference]: Start difference. First operand 2511 states and 4317 transitions. Second operand 4 states. [2020-09-21 10:33:48,105 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 411