/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/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:43:27,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:43:27,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:43:27,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:43:27,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:43:27,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:43:27,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:43:27,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:43:27,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:43:27,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:43:27,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:43:27,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:43:27,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:43:27,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:43:27,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:43:27,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:43:27,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:43:27,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:43:27,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:43:27,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:43:27,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:43:27,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:43:27,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:43:27,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:43:27,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:43:27,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:43:27,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:43:27,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:43:27,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:43:27,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:43:27,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:43:27,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:43:27,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:43:27,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:43:27,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:43:27,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:43:27,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:43:27,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:43:27,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:43:27,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:43:27,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:43:27,527 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 15:43:27,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:43:27,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:43:27,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:43:27,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:43:27,550 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:43:27,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:43:27,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:43:27,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:43:27,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:43:27,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:43:27,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:43:27,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:43:27,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:43:27,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:43:27,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:43:27,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:43:27,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:43:27,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:43:27,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:43:27,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:43:27,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:43:27,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:43:27,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:43:27,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:43:27,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:43:27,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:43:27,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:43:27,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:43:27,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:43:27,554 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 15:43:27,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:43:27,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:43:27,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:43:27,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:43:27,867 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:43:27,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2020-10-12 15:43:27,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c51e8ca/a1e115cd6b0a42eabd5743018d90f5a7/FLAGdde1964ee [2020-10-12 15:43:28,326 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:43:28,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test22-2.c [2020-10-12 15:43:28,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c51e8ca/a1e115cd6b0a42eabd5743018d90f5a7/FLAGdde1964ee [2020-10-12 15:43:28,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38c51e8ca/a1e115cd6b0a42eabd5743018d90f5a7 [2020-10-12 15:43:28,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:43:28,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:43:28,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:43:28,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:43:28,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:43:28,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:28,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1d2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28, skipping insertion in model container [2020-10-12 15:43:28,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:28,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:43:28,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:43:28,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:43:28,924 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:43:28,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:43:28,963 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:43:28,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28 WrapperNode [2020-10-12 15:43:28,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:43:28,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:43:28,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:43:28,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:43:29,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (1/1) ... [2020-10-12 15:43:29,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:43:29,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:43:29,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:43:29,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:43:29,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (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 15:43:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:43:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:43:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-12 15:43:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-10-12 15:43:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-12 15:43:29,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:43:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:43:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:43:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 15:43:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 15:43:29,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:43:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-10-12 15:43:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 15:43:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:43:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:43:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:43:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:43:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-12 15:43:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:43:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:43:29,413 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:43:29,413 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:43:29,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:43:29 BoogieIcfgContainer [2020-10-12 15:43:29,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:43:29,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:43:29,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:43:29,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:43:29,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:43:28" (1/3) ... [2020-10-12 15:43:29,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfb6b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:43:29, skipping insertion in model container [2020-10-12 15:43:29,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:28" (2/3) ... [2020-10-12 15:43:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfb6b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:43:29, skipping insertion in model container [2020-10-12 15:43:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:43:29" (3/3) ... [2020-10-12 15:43:29,426 INFO L109 eAbstractionObserver]: Analyzing ICFG test22-2.c [2020-10-12 15:43:29,438 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:43:29,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:43:29,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:43:29,485 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:43:29,486 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:43:29,486 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:43:29,486 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:43:29,486 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:43:29,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:43:29,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:43:29,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:43:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-12 15:43:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:43:29,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:29,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 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 15:43:29,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1345538594, now seen corresponding path program 1 times [2020-10-12 15:43:29,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:29,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652942363] [2020-10-12 15:43:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:29,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:29,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:29,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:43:29,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:29,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-12 15:43:29,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 15:43:29,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:29,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:43:30,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:30,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:30,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:30,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 15:43:30,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:30,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:30,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:30,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:43:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:30,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:30,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:30,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:30,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:30,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:30,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:30,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 15:43:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:30,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:30,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:30,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:43:30,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:30,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:30,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:30,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:30,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:30,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:43:30,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:30,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:30,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:30,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:30,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:43:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:30,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:30,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:30,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:30,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:30,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:30,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 15:43:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:30,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:30,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:43:30,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:30,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:30,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:30,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:30,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 15:43:30,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652942363] [2020-10-12 15:43:30,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:30,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:43:30,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102219233] [2020-10-12 15:43:30,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:43:30,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:43:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:43:30,177 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-12 15:43:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:30,384 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-12 15:43:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:43:30,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-12 15:43:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:30,395 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:43:30,396 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 15:43:30,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:43:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 15:43:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 15:43:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:43:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-12 15:43:30,499 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2020-10-12 15:43:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:30,506 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-12 15:43:30,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:43:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-12 15:43:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:43:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:30,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 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 15:43:30,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:43:30,512 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash -213153012, now seen corresponding path program 1 times [2020-10-12 15:43:30,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:30,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15161247] [2020-10-12 15:43:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:30,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:43:32,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:32,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-10-12 15:43:32,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:43:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 15:43:32,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:43:32,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:32,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 15:43:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:32,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 15:43:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:32,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:32,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:43:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:43:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:32,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:43:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 15:43:32,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:43:32,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:32,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:43:32,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:43:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:32,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:32,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:32,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:32,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:32,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:32,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 15:43:32,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15161247] [2020-10-12 15:43:32,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:32,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 15:43:32,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15247732] [2020-10-12 15:43:32,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:32,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:32,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:32,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:32,451 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 13 states. [2020-10-12 15:43:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:33,375 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-12 15:43:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:43:33,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:43:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:33,380 INFO L225 Difference]: With dead ends: 77 [2020-10-12 15:43:33,380 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:43:33,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:43:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:43:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 41. [2020-10-12 15:43:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:43:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-12 15:43:33,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 38 [2020-10-12 15:43:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:33,396 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-12 15:43:33,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-12 15:43:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:43:33,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:33,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2020-10-12 15:43:33,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:43:33,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1234221366, now seen corresponding path program 1 times [2020-10-12 15:43:33,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:33,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203683349] [2020-10-12 15:43:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:43:33,418 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:43:33,418 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:43:33,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:43:33,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:43:33 BoogieIcfgContainer [2020-10-12 15:43:33,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:43:33,443 INFO L168 Benchmark]: Toolchain (without parser) took 4730.51 ms. Allocated memory was 141.0 MB in the beginning and 276.8 MB in the end (delta: 135.8 MB). Free memory was 103.8 MB in the beginning and 154.5 MB in the end (delta: -50.7 MB). Peak memory consumption was 85.1 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:33,444 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-12 15:43:33,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.83 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 93.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:33,446 INFO L168 Benchmark]: Boogie Preprocessor took 120.82 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:33,447 INFO L168 Benchmark]: RCFGBuilder took 329.93 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 162.4 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:33,448 INFO L168 Benchmark]: TraceAbstraction took 4021.31 ms. Allocated memory was 203.9 MB in the beginning and 276.8 MB in the end (delta: 72.9 MB). Free memory was 162.4 MB in the beginning and 154.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:33,452 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.83 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 93.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.82 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.93 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 162.4 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4021.31 ms. Allocated memory was 203.9 MB in the beginning and 276.8 MB in the end (delta: 72.9 MB). Free memory was 162.4 MB in the beginning and 154.5 MB in the end (delta: 7.9 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 48]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] struct dummy d1, d2; [L32] CALL init() [L13] d1.a = __VERIFIER_nondet_int() [L14] d1.b = __VERIFIER_nondet_int() [L16] d2.a = __VERIFIER_nondet_int() [L17] d2.b = __VERIFIER_nondet_int() [L32] RET init() [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L34] int i = __VERIFIER_nondet_int(); [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] EXPR (*pd2).a [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L35] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L36] int *pa = &pd1->a; [L37] EXPR pd3->a [L37] i = pd3->a - 10 [L38] EXPR \read(*pa) [L38] COND FALSE !(i < *pa) [L41] CALL, EXPR check(pd2, i) [L27] EXPR s1->a [L27] return s1->a == i; [L41] RET, EXPR check(pd2, i) [L41] COND TRUE !check(pd2, i) [L48] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 113 SDslu, 51 SDs, 0 SdLazy, 401 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=2, 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, 2 MinimizatonAttempts, 28 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 7560 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 24/24 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 incorrect! Received shutdown request...