/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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:43:28,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:43:28,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:43:28,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:43:28,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:43:28,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:43:28,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:43:28,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:43:28,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:43:28,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:43:28,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:43:28,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:43:28,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:43:28,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:43:28,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:43:28,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:43:28,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:43:28,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:43:28,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:43:28,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:43:28,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:43:28,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:43:28,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:43:28,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:43:28,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:43:28,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:43:28,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:43:28,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:43:28,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:43:28,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:43:28,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:43:28,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:43:28,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:43:28,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:43:28,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:43:28,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:43:28,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:43:28,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:43:28,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:43:28,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:43:28,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:43:28,386 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 [2020-10-12 15:43:28,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:43:28,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:43:28,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:43:28,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:43:28,411 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:43:28,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:43:28,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:43:28,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:43:28,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:43:28,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:43:28,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:43:28,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:43:28,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:43:28,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:43:28,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:43:28,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:43:28,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:43:28,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:43:28,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:43:28,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:43:28,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:43:28,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:43:28,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:43:28,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:43:28,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:43:28,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:43:28,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:43:28,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:43:28,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:43:28,416 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.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:43:28,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:43:28,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:43:28,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:43:28,731 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:43:28,732 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:43:28,733 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2020-10-12 15:43:28,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ae3232b/605224845191487eb62a29aa5173d0e8/FLAGa3217dacd [2020-10-12 15:43:29,345 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:43:29,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test23-2.c [2020-10-12 15:43:29,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ae3232b/605224845191487eb62a29aa5173d0e8/FLAGa3217dacd [2020-10-12 15:43:29,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64ae3232b/605224845191487eb62a29aa5173d0e8 [2020-10-12 15:43:29,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:43:29,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:43:29,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:43:29,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:43:29,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:43:29,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:43:29" (1/1) ... [2020-10-12 15:43:29,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1058f97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:29, skipping insertion in model container [2020-10-12 15:43:29,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:43:29" (1/1) ... [2020-10-12 15:43:29,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:43:29,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:43:29,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:43:29,961 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:43:29,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:43:30,079 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:43:30,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30 WrapperNode [2020-10-12 15:43:30,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:43:30,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:43:30,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:43:30,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:43:30,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (1/1) ... [2020-10-12 15:43:30,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:43:30,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:43:30,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:43:30,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:43:30,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (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 [2020-10-12 15:43:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:43:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:43:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-12 15:43:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-10-12 15:43:30,192 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-12 15:43:30,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:43:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:43:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:43:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 15:43:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 15:43:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:43:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-10-12 15:43:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 15:43:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:43:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:43:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:43:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:43:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:43:30,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:43:30,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:43:30,512 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:43:30,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:43:30 BoogieIcfgContainer [2020-10-12 15:43:30,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:43:30,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:43:30,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:43:30,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:43:30,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:43:29" (1/3) ... [2020-10-12 15:43:30,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a7e7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:43:30, skipping insertion in model container [2020-10-12 15:43:30,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:30" (2/3) ... [2020-10-12 15:43:30,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a7e7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:43:30, skipping insertion in model container [2020-10-12 15:43:30,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:43:30" (3/3) ... [2020-10-12 15:43:30,525 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2020-10-12 15:43:30,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:43:30,544 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:43:30,559 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:43:30,580 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:43:30,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:43:30,581 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:43:30,581 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:43:30,581 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:43:30,581 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:43:30,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:43:30,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:43:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 15:43:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:43:30,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:30,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:30,609 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -128514638, now seen corresponding path program 1 times [2020-10-12 15:43:30,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:30,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625861370] [2020-10-12 15:43:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:43:31,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-12 15:43:31,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-12 15:43:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:31,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 15:43:31,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:31,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 15:43:31,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:31,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:31,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:43:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:31,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:31,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:31,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:31,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:31,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:31,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:31,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 15:43:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:31,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:43:31,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:31,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:31,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:31,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:43:31,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:43:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:31,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:31,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:43:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:43:31,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625861370] [2020-10-12 15:43:31,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:31,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:43:31,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137885522] [2020-10-12 15:43:31,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:43:31,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:43:31,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:43:31,331 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-12 15:43:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:31,473 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-12 15:43:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 15:43:31,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-12 15:43:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:31,487 INFO L225 Difference]: With dead ends: 46 [2020-10-12 15:43:31,487 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 15:43:31,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:43:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 15:43:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 15:43:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 15:43:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 15:43:31,543 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 30 [2020-10-12 15:43:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:31,546 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 15:43:31,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:43:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 15:43:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:43:31,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:31,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:31,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:43:31,549 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1246729484, now seen corresponding path program 1 times [2020-10-12 15:43:31,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:31,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546574746] [2020-10-12 15:43:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:31,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:31,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:43:31,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:31,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-12 15:43:31,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:43:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 15:43:31,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 15:43:31,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:31,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:43:32,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:43:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:32,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 15:43:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:43:32,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:32,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 15:43:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:32,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:32,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:43:32,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546574746] [2020-10-12 15:43:32,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:32,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:43:32,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501627645] [2020-10-12 15:43:32,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:43:32,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:43:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:43:32,095 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-12 15:43:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:32,270 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-12 15:43:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:43:32,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-12 15:43:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:32,273 INFO L225 Difference]: With dead ends: 38 [2020-10-12 15:43:32,274 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 15:43:32,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:43:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 15:43:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 15:43:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:43:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 15:43:32,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 31 [2020-10-12 15:43:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:32,296 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 15:43:32,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:43:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 15:43:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:43:32,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:32,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:32,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:43:32,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1472168143, now seen corresponding path program 1 times [2020-10-12 15:43:32,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:32,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911655073] [2020-10-12 15:43:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:43:32,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-12 15:43:32,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:43:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 15:43:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:43:32,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:43:32,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:43:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:32,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 15:43:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:32,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:32,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 15:43:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:32,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:43:32,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911655073] [2020-10-12 15:43:32,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:32,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:43:32,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533637778] [2020-10-12 15:43:32,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:43:32,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:43:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:43:32,789 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-10-12 15:43:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:32,965 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-12 15:43:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:43:32,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-12 15:43:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:32,967 INFO L225 Difference]: With dead ends: 40 [2020-10-12 15:43:32,967 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 15:43:32,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:43:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 15:43:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 15:43:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 15:43:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-12 15:43:32,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2020-10-12 15:43:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:32,976 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-12 15:43:32,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:43:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-12 15:43:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:43:32,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:32,978 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:32,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:43:32,978 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1302295574, now seen corresponding path program 2 times [2020-10-12 15:43:32,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:32,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694302816] [2020-10-12 15:43:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:43:33,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:33,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-12 15:43:33,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:43:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 15:43:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:43:33,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:33,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:33,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:33,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:43:33,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:33,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:33,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:33,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:33,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:43:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:33,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:33,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:43:33,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 15:43:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:33,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:33,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:33,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:33,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 15:43:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:33,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:33,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:33,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:33,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 15:43:33,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:33,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:33,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:43:33,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 15:43:33,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694302816] [2020-10-12 15:43:33,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:33,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:43:33,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050147758] [2020-10-12 15:43:33,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:43:33,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:43:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:43:33,676 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-12 15:43:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:34,032 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-12 15:43:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:43:34,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-12 15:43:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:34,033 INFO L225 Difference]: With dead ends: 32 [2020-10-12 15:43:34,034 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 15:43:34,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:43:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 15:43:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 15:43:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 15:43:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 15:43:34,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-12 15:43:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:34,036 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 15:43:34,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:43:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 15:43:34,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 15:43:34,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:43:34,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 15:43:34,163 INFO L268 CegarLoopResult]: For program point initEXIT(lines 12 19) no Hoare annotation was computed. [2020-10-12 15:43:34,164 INFO L264 CegarLoopResult]: At program point initENTRY(lines 12 19) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-12 15:43:34,164 INFO L268 CegarLoopResult]: For program point initFINAL(lines 12 19) no Hoare annotation was computed. [2020-10-12 15:43:34,164 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-12 15:43:34,164 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#d1~0.offset| |old(~#d1~0.offset)|) (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |~#d2~0.base| |old(~#d2~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#d1~0.base| |old(~#d1~0.base)|) (= |~#d2~0.offset| |old(~#d2~0.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-12 15:43:34,165 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 15:43:34,165 INFO L268 CegarLoopResult]: For program point get_dummyFINAL(lines 21 24) no Hoare annotation was computed. [2020-10-12 15:43:34,165 INFO L271 CegarLoopResult]: At program point get_dummyENTRY(lines 21 24) the Hoare annotation is: true [2020-10-12 15:43:34,165 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-12 15:43:34,165 INFO L268 CegarLoopResult]: For program point get_dummyEXIT(lines 21 24) no Hoare annotation was computed. [2020-10-12 15:43:34,166 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 15:43:34,166 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 15:43:34,166 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 15:43:34,166 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 15:43:34,166 INFO L271 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-10-12 15:43:34,167 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 31 52) no Hoare annotation was computed. [2020-10-12 15:43:34,167 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 31 52) no Hoare annotation was computed. [2020-10-12 15:43:34,167 INFO L264 CegarLoopResult]: At program point L44(lines 32 52) the Hoare annotation is: false [2020-10-12 15:43:34,167 INFO L268 CegarLoopResult]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2020-10-12 15:43:34,167 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 42) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) (and (<= (* 4 main_~i~0) (* 4 .cse0)) (= (+ main_~pd2~0.offset (* .cse0 4) 8) main_~pa~0.offset) (= main_~pd2~0.base main_~pa~0.base))) [2020-10-12 15:43:34,168 INFO L268 CegarLoopResult]: For program point L36(lines 36 46) no Hoare annotation was computed. [2020-10-12 15:43:34,168 INFO L264 CegarLoopResult]: At program point L40-4(lines 40 42) the Hoare annotation is: (let ((.cse0 (* 4 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)))) (and (= main_~i~0 (select (select |#memory_int| main_~pd2~0.base) (+ main_~pd2~0.offset (* main_~i~0 4) 8))) (<= (* 4 main_~i~0) .cse0) (= (+ main_~pd2~0.offset .cse0 8) main_~pa~0.offset) (= main_~pd2~0.base main_~pa~0.base))) [2020-10-12 15:43:34,168 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-10-12 15:43:34,168 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 46) no Hoare annotation was computed. [2020-10-12 15:43:34,168 INFO L271 CegarLoopResult]: At program point L34-1(line 34) the Hoare annotation is: true [2020-10-12 15:43:34,169 INFO L268 CegarLoopResult]: For program point L34-2(line 34) no Hoare annotation was computed. [2020-10-12 15:43:34,169 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 50) no Hoare annotation was computed. [2020-10-12 15:43:34,169 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 31 52) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-12 15:43:34,169 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-10-12 15:43:34,169 INFO L268 CegarLoopResult]: For program point L43-1(lines 43 45) no Hoare annotation was computed. [2020-10-12 15:43:34,170 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 26 29) the Hoare annotation is: true [2020-10-12 15:43:34,170 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 26 29) no Hoare annotation was computed. [2020-10-12 15:43:34,170 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 26 29) no Hoare annotation was computed. [2020-10-12 15:43:34,185 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,186 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,192 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,192 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:43:34 BoogieIcfgContainer [2020-10-12 15:43:34,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:43:34,198 INFO L168 Benchmark]: Toolchain (without parser) took 4484.30 ms. Allocated memory was 141.0 MB in the beginning and 245.4 MB in the end (delta: 104.3 MB). Free memory was 104.5 MB in the beginning and 138.6 MB in the end (delta: -34.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:34,199 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:43:34,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.84 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 104.3 MB in the beginning and 182.2 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:34,201 INFO L168 Benchmark]: Boogie Preprocessor took 42.30 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 179.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:34,202 INFO L168 Benchmark]: RCFGBuilder took 393.69 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 162.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:34,203 INFO L168 Benchmark]: TraceAbstraction took 3676.73 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 161.9 MB in the beginning and 138.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 64.6 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:34,207 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 366.84 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 104.3 MB in the beginning and 182.2 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.30 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 179.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.69 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 162.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3676.73 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 161.9 MB in the beginning and 138.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 64.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant [2020-10-12 15:43:34,217 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,218 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,219 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-12 15:43:34,219 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (4 * i <= 4 * unknown-#memory_int-unknown[pa][pa] && pd2 + unknown-#memory_int-unknown[pa][pa] * 4 + 8 == pa) && pd2 == pa - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 31 SDslu, 183 SDs, 0 SdLazy, 298 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 16 PreInvPairs, 19 NumberOfFragments, 107 HoareAnnotationTreeSize, 16 FomulaSimplifications, 73 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 104 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 14820 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...