/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 SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:58:35,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:58:35,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:58:35,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:58:35,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:58:35,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:58:35,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:58:35,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:58:35,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:58:35,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:58:35,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:58:35,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:58:35,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:58:35,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:58:35,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:58:35,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:58:35,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:58:35,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:58:35,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:58:35,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:58:35,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:58:35,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:58:35,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:58:35,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:58:35,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:58:35,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:58:35,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:58:35,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:58:35,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:58:35,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:58:35,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:58:35,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:58:35,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:58:35,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:58:35,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:58:35,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:58:35,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:58:35,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:58:35,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:58:35,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:58:35,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:58:35,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:58:35,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:58:35,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:58:35,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:58:35,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:58:35,425 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:58:35,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:58:35,426 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:58:35,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:58:35,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:58:35,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:58:35,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:58:35,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:58:35,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:58:35,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:58:35,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:58:35,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:58:35,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:58:35,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:58:35,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:58:35,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:58:35,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:58:35,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:58:35,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:58:35,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:58:35,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:58:35,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:58:35,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:58:35,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:58:35,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:58:35,430 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 -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 09:58:35,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:58:35,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:58:35,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:58:35,935 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:58:35,936 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:58:35,937 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-25 09:58:36,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc9655af9/16e015bfd8c441d9abaf686fcff18ac6/FLAGc665f3f39 [2020-09-25 09:58:36,536 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:58:36,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-25 09:58:36,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc9655af9/16e015bfd8c441d9abaf686fcff18ac6/FLAGc665f3f39 [2020-09-25 09:58:36,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc9655af9/16e015bfd8c441d9abaf686fcff18ac6 [2020-09-25 09:58:36,917 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:58:36,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:58:36,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:58:36,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:58:36,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:58:36,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:58:36" (1/1) ... [2020-09-25 09:58:36,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122c307d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:36, skipping insertion in model container [2020-09-25 09:58:36,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:58:36" (1/1) ... [2020-09-25 09:58:36,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:58:36,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:58:37,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:58:37,177 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:58:37,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:58:37,214 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:58:37,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37 WrapperNode [2020-09-25 09:58:37,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:58:37,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:58:37,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:58:37,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:58:37,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... [2020-09-25 09:58:37,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:58:37,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:58:37,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:58:37,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:58:37,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:58:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:58:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:58:37,405 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-09-25 09:58:37,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:58:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:58:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:58:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-09-25 09:58:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:58:37,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:58:37,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:58:37,606 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:58:37,606 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:58:37,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:58:37 BoogieIcfgContainer [2020-09-25 09:58:37,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:58:37,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:58:37,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:58:37,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:58:37,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:58:36" (1/3) ... [2020-09-25 09:58:37,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ad491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:58:37, skipping insertion in model container [2020-09-25 09:58:37,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:58:37" (2/3) ... [2020-09-25 09:58:37,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ad491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:58:37, skipping insertion in model container [2020-09-25 09:58:37,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:58:37" (3/3) ... [2020-09-25 09:58:37,621 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-09-25 09:58:37,633 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:58:37,645 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:58:37,671 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:58:37,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:58:37,735 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:58:37,735 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:58:37,735 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:58:37,736 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:58:37,736 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:58:37,736 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:58:37,736 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:58:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-25 09:58:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 09:58:37,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:58:37,790 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:58:37,790 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:58:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:58:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash 31169137, now seen corresponding path program 1 times [2020-09-25 09:58:37,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:58:37,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109858687] [2020-09-25 09:58:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:58:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:37,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:38,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:38,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:58:38,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:58:38,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-09-25 09:58:38,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:38,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:38,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:58:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:58:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:58:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:58:38,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:58:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:38,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:38,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 09:58:38,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:38,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:58:38,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:38,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:58:38,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:38,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:58:38,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:38,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 09:58:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:38,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:38,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:38,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 09:58:38,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:58:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 09:58:38,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:38,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:38,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:58:38,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 09:58:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:38,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 09:58:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:58:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:38,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:58:38,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:58:38,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 09:58:38,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:58:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 09:58:38,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 09:58:38,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 09:58:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:58:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:58:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 09:58:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:58:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 09:58:38,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109858687] [2020-09-25 09:58:38,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:58:38,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:58:38,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834661425] [2020-09-25 09:58:38,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:58:38,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:58:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:58:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:58:38,893 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 7 states. [2020-09-25 09:58:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:58:39,102 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-09-25 09:58:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:58:39,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 09:58:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:58:39,117 INFO L225 Difference]: With dead ends: 60 [2020-09-25 09:58:39,118 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 09:58:39,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:58:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 09:58:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-25 09:58:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-25 09:58:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-25 09:58:39,173 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2020-09-25 09:58:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:58:39,174 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-25 09:58:39,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:58:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-25 09:58:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 09:58:39,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:58:39,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:58:39,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:58:39,179 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:58:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:58:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash 812451921, now seen corresponding path program 1 times [2020-09-25 09:58:39,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:58:39,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335215710] [2020-09-25 09:58:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:58:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:58:39,203 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:58:39,203 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:58:39,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:58:39,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:58:39 BoogieIcfgContainer [2020-09-25 09:58:39,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:58:39,235 INFO L168 Benchmark]: Toolchain (without parser) took 2315.41 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 91.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:39,237 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 09:58:39,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.20 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:39,239 INFO L168 Benchmark]: Boogie Preprocessor took 34.60 ms. Allocated memory is still 138.4 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:39,240 INFO L168 Benchmark]: RCFGBuilder took 360.95 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.7 MB in the beginning and 168.3 MB in the end (delta: -77.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:39,241 INFO L168 Benchmark]: TraceAbstraction took 1618.93 ms. Allocated memory is still 201.3 MB. Free memory was 168.3 MB in the beginning and 91.8 MB in the end (delta: 76.5 MB). Peak memory consumption was 76.5 MB. Max. memory is 7.1 GB. [2020-09-25 09:58:39,245 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.20 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.60 ms. Allocated memory is still 138.4 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.95 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.7 MB in the beginning and 168.3 MB in the end (delta: -77.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1618.93 ms. Allocated memory is still 201.3 MB. Free memory was 168.3 MB in the beginning and 91.8 MB in the end (delta: 76.5 MB). Peak memory consumption was 76.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; [L28] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L28] RET A(g,h) [L29] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L29] RET A(g,h) [L30] COND TRUE \read(g) [L31] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 26 SDslu, 59 SDs, 0 SdLazy, 38 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 2352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 6/6 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 incorrect! Received shutdown request...