/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 0.1.25-5644d1e-m [2020-08-18 15:39:23,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:39:23,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:39:23,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:39:23,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:39:23,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:39:23,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:39:23,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:39:23,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:39:23,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:39:23,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:39:23,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:39:23,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:39:23,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:39:23,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:39:23,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:39:23,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:39:23,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:39:23,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:39:23,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:39:23,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:39:23,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:39:23,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:39:23,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:39:23,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:39:23,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:39:23,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:39:23,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:39:23,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:39:23,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:39:23,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:39:23,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:39:23,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:39:23,246 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:39:23,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:39:23,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:39:23,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:39:23,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:39:23,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:39:23,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:39:23,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:39:23,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:39:23,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:39:23,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:39:23,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:39:23,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:39:23,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:39:23,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:39:23,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:39:23,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:39:23,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:39:23,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:39:23,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:39:23,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:39:23,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:39:23,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:39:23,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:39:23,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:39:23,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:39:23,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:39:23,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:39:23,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:39:23,557 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:39:23,557 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:39:23,558 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 15:39:23,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58ab26621/89115a83eb694132bb0d2835da9e24cd/FLAGb8c31b418 [2020-08-18 15:39:24,378 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:39:24,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 15:39:24,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58ab26621/89115a83eb694132bb0d2835da9e24cd/FLAGb8c31b418 [2020-08-18 15:39:24,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58ab26621/89115a83eb694132bb0d2835da9e24cd [2020-08-18 15:39:24,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:39:24,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:39:24,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:39:24,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:39:24,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:39:24,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:39:24" (1/1) ... [2020-08-18 15:39:24,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4603aae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:24, skipping insertion in model container [2020-08-18 15:39:24,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:39:24" (1/1) ... [2020-08-18 15:39:24,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:39:24,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:39:26,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:39:26,517 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:39:27,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:39:27,989 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:39:27,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27 WrapperNode [2020-08-18 15:39:27,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:39:27,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:39:27,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:39:27,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:39:28,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... [2020-08-18 15:39:28,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:39:28,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:39:28,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:39:28,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:39:28,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:39:28,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:39:28,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:39:28,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 15:39:28,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:39:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:39:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 15:39:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 15:39:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 15:39:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 15:39:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 15:39:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 15:39:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 15:39:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 15:39:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 15:39:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 15:39:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 15:39:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 15:39:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 15:39:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 15:39:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 15:39:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:39:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:39:28,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:39:32,583 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:39:32,584 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:39:32,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:39:32 BoogieIcfgContainer [2020-08-18 15:39:32,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:39:32,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:39:32,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:39:32,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:39:32,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:39:24" (1/3) ... [2020-08-18 15:39:32,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbd3af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:39:32, skipping insertion in model container [2020-08-18 15:39:32,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:39:27" (2/3) ... [2020-08-18 15:39:32,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbd3af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:39:32, skipping insertion in model container [2020-08-18 15:39:32,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:39:32" (3/3) ... [2020-08-18 15:39:32,608 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 15:39:32,618 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:39:32,635 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 15:39:32,650 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 15:39:32,679 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:39:32,679 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:39:32,680 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:39:32,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:39:32,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:39:32,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:39:32,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:39:32,680 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:39:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-08-18 15:39:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-18 15:39:32,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:32,781 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] [2020-08-18 15:39:32,782 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-08-18 15:39:32,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:32,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658668150] [2020-08-18 15:39:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:36,265 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 15:39:36,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:39:37,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658668150] [2020-08-18 15:39:37,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:37,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:39:37,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060995333] [2020-08-18 15:39:37,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:39:37,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:39:37,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:39:37,279 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2020-08-18 15:39:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:39:54,924 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-08-18 15:39:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:39:54,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-08-18 15:39:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:39:54,967 INFO L225 Difference]: With dead ends: 4460 [2020-08-18 15:39:54,967 INFO L226 Difference]: Without dead ends: 2963 [2020-08-18 15:39:54,980 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 [2020-08-18 15:39:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-08-18 15:39:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-08-18 15:39:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-08-18 15:39:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-08-18 15:39:55,205 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-08-18 15:39:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:39:55,206 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-08-18 15:39:55,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:39:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-08-18 15:39:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-08-18 15:39:55,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:39:55,224 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] [2020-08-18 15:39:55,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:39:55,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:39:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:39:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-08-18 15:39:55,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:39:55,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692672781] [2020-08-18 15:39:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:39:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:56,796 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 15:39:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:39:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:39:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:39:57,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692672781] [2020-08-18 15:39:57,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:39:57,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:39:57,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548180573] [2020-08-18 15:39:57,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:39:57,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:39:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:39:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:39:57,548 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2020-08-18 15:40:18,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:40:18,817 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-08-18 15:40:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 15:40:18,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-08-18 15:40:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:40:18,848 INFO L225 Difference]: With dead ends: 8439 [2020-08-18 15:40:18,848 INFO L226 Difference]: Without dead ends: 5747 [2020-08-18 15:40:18,855 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 [2020-08-18 15:40:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-08-18 15:40:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-08-18 15:40:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-08-18 15:40:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2020-08-18 15:40:19,078 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2020-08-18 15:40:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:40:19,080 INFO L479 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2020-08-18 15:40:19,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:40:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2020-08-18 15:40:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-18 15:40:19,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:40:19,104 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, 1] [2020-08-18 15:40:19,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:40:19,106 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:40:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:40:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times [2020-08-18 15:40:19,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:40:19,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827661349] [2020-08-18 15:40:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:40:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:40:20,199 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 15:40:20,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:40:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:40:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:40:20,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827661349] [2020-08-18 15:40:20,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:40:20,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:40:20,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429662057] [2020-08-18 15:40:20,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:40:20,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:40:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:40:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:40:20,375 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states.