/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -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 11:31:12,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:31:12,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:31:12,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:31:12,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:31:12,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:31:12,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:31:12,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:31:12,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:31:12,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:31:12,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:31:12,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:31:12,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:31:12,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:31:12,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:31:12,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:31:12,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:31:12,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:31:12,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:31:12,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:31:12,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:31:12,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:31:12,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:31:12,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:31:12,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:31:12,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:31:12,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:31:12,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:31:12,131 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 11:31:12,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:31:12,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:31:12,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:31:12,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:31:12,162 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:31:12,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:31:12,163 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:31:12,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:31:12,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:31:12,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:31:12,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:31:12,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:31:12,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:31:12,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:31:12,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:31:12,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:31:12,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:31:12,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:31:12,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:31:12,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:31:12,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:31:12,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:31:12,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:31:12,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:31:12,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:31:12,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:31:12,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:31:12,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:31:12,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:31:12,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 11:31:12,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:31:12,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:31:12,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:31:12,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:31:12,491 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:31:12,492 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 11:31:12,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04d549275/1152bc1665804da5af56383ada7a8c35/FLAG15b91ca59 [2020-08-18 11:31:13,216 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:31:13,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 11:31:13,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04d549275/1152bc1665804da5af56383ada7a8c35/FLAG15b91ca59 [2020-08-18 11:31:13,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04d549275/1152bc1665804da5af56383ada7a8c35 [2020-08-18 11:31:13,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:31:13,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:31:13,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:31:13,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:31:13,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:31:13,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:13" (1/1) ... [2020-08-18 11:31:13,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d135d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:13, skipping insertion in model container [2020-08-18 11:31:13,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:13" (1/1) ... [2020-08-18 11:31:13,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:31:13,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:31:15,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:31:15,284 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:31:16,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:31:16,999 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:31:17,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17 WrapperNode [2020-08-18 11:31:17,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:31:17,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:31:17,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:31:17,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:31:17,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (1/1) ... [2020-08-18 11:31:17,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:31:17,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:31:17,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:31:17,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:31:17,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (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 [2020-08-18 11:31:17,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:31:17,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:31:17,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 11:31:17,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:31:17,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:31:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 11:31:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 11:31:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 11:31:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-18 11:31:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 11:31:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 11:31:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-18 11:31:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-18 11:31:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-18 11:31:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-18 11:31:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-18 11:31:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-18 11:31:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-08-18 11:31:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 11:31:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 11:31:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:31:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:31:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:31:21,637 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:31:21,638 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 11:31:21,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:21 BoogieIcfgContainer [2020-08-18 11:31:21,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:31:21,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:31:21,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:31:21,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:31:21,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:31:13" (1/3) ... [2020-08-18 11:31:21,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f236d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:21, skipping insertion in model container [2020-08-18 11:31:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:17" (2/3) ... [2020-08-18 11:31:21,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f236d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:21, skipping insertion in model container [2020-08-18 11:31:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:21" (3/3) ... [2020-08-18 11:31:21,660 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-08-18 11:31:21,671 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:31:21,680 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-18 11:31:21,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-18 11:31:21,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:31:21,725 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:31:21,725 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:31:21,725 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:31:21,725 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:31:21,725 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:31:21,725 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:31:21,725 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:31:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-08-18 11:31:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-08-18 11:31:21,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:21,820 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 11:31:21,820 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-08-18 11:31:21,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:21,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549636883] [2020-08-18 11:31:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:25,171 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 11:31:25,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:25,862 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 11:31:25,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549636883] [2020-08-18 11:31:25,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:25,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:31:25,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825000321] [2020-08-18 11:31:25,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:31:25,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:31:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:31:25,891 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2020-08-18 11:31:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:31:42,662 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-08-18 11:31:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:31:42,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-08-18 11:31:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:31:42,708 INFO L225 Difference]: With dead ends: 4460 [2020-08-18 11:31:42,708 INFO L226 Difference]: Without dead ends: 2963 [2020-08-18 11:31:42,721 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 11:31:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-08-18 11:31:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-08-18 11:31:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-08-18 11:31:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-08-18 11:31:42,955 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-08-18 11:31:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:31:42,956 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-08-18 11:31:42,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:31:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-08-18 11:31:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-08-18 11:31:42,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:31:42,974 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 11:31:42,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:31:42,975 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:31:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:31:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-08-18 11:31:42,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:31:42,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529558506] [2020-08-18 11:31:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:31:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:44,704 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 11:31:44,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:31:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:31:45,208 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 11:31:45,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529558506] [2020-08-18 11:31:45,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:31:45,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:31:45,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178167137] [2020-08-18 11:31:45,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:31:45,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:31:45,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:31:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:31:45,213 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2020-08-18 11:32:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:32:05,941 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-08-18 11:32:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:32:05,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-08-18 11:32:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:32:05,974 INFO L225 Difference]: With dead ends: 8439 [2020-08-18 11:32:05,975 INFO L226 Difference]: Without dead ends: 5747 [2020-08-18 11:32:05,982 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 11:32:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-08-18 11:32:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-08-18 11:32:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-08-18 11:32:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2020-08-18 11:32:06,205 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2020-08-18 11:32:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:32:06,207 INFO L479 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2020-08-18 11:32:06,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:32:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2020-08-18 11:32:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-08-18 11:32:06,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:32:06,234 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 11:32:06,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:32:06,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:32:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:32:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times [2020-08-18 11:32:06,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:32:06,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15019091] [2020-08-18 11:32:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:32:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:32:07,333 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2020-08-18 11:32:07,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:32:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:32:07,505 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 11:32:07,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15019091] [2020-08-18 11:32:07,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:32:07,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:32:07,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715434461] [2020-08-18 11:32:07,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:32:07,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:32:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:32:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:32:07,509 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states.