/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:56,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:56,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:56,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:56,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:56,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:56,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:56,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:56,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:56,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:56,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:56,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:56,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:56,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:56,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:56,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:56,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:56,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:56,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:56,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:56,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:56,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:56,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:56,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:56,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:56,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:56,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:56,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:56,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:56,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:56,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:56,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:56,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:56,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:56,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:56,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:56,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:56,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:56,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:56,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:56,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:56,380 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 [2020-09-24 18:29:56,411 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:56,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:56,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:56,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:56,414 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:56,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:56,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:56,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:56,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:56,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:56,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:56,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:56,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:56,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:56,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:56,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:56,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:56,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:56,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:56,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:56,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:56,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:56,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:56,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:56,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:56,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:56,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:56,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:56,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:56,422 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:29:56,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:56,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:56,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:56,952 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:56,953 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:56,954 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2020-09-24 18:29:57,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd82b7457/a3d316ee9a26438f9b90ed8c3e7fc94d/FLAG15b612020 [2020-09-24 18:29:57,560 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:57,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2020-09-24 18:29:57,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd82b7457/a3d316ee9a26438f9b90ed8c3e7fc94d/FLAG15b612020 [2020-09-24 18:29:57,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd82b7457/a3d316ee9a26438f9b90ed8c3e7fc94d [2020-09-24 18:29:57,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:57,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:57,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:57,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:57,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:57,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:57" (1/1) ... [2020-09-24 18:29:57,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4c9c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:57, skipping insertion in model container [2020-09-24 18:29:57,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:57" (1/1) ... [2020-09-24 18:29:57,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:57,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:58,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:58,263 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:58,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:58,300 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:58,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58 WrapperNode [2020-09-24 18:29:58,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:58,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:58,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:58,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:58,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (1/1) ... [2020-09-24 18:29:58,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:58,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:58,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:58,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:58,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (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 [2020-09-24 18:29:58,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:58,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:58,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 18:29:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:58,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:29:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 18:29:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:29:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:58,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:58,846 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:29:58,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:58 BoogieIcfgContainer [2020-09-24 18:29:58,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:58,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:58,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:58,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:58,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:57" (1/3) ... [2020-09-24 18:29:58,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107d93d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:58, skipping insertion in model container [2020-09-24 18:29:58,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:58" (2/3) ... [2020-09-24 18:29:58,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107d93d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:58, skipping insertion in model container [2020-09-24 18:29:58,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:58" (3/3) ... [2020-09-24 18:29:58,862 INFO L109 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2020-09-24 18:29:58,872 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:58,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:58,905 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:58,934 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:58,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:58,935 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:58,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:58,935 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:58,935 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:58,935 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:58,935 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-09-24 18:29:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 18:29:58,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:58,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:58,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1281286412, now seen corresponding path program 1 times [2020-09-24 18:29:58,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:58,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330149002] [2020-09-24 18:29:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:59,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:59,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 18:29:59,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:59,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-09-24 18:29:59,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:29:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-24 18:29:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 18:29:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:29:59,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:59,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:59,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:59,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:59,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:59,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:59,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:59,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:59,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:59,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330149002] [2020-09-24 18:29:59,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:59,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 18:29:59,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290162622] [2020-09-24 18:29:59,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:29:59,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:29:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:59,691 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 7 states. [2020-09-24 18:29:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:59,887 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-09-24 18:29:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:29:59,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-24 18:29:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:59,901 INFO L225 Difference]: With dead ends: 77 [2020-09-24 18:29:59,902 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 18:29:59,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 18:29:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-24 18:29:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 18:29:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-09-24 18:29:59,960 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 37 [2020-09-24 18:29:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:59,961 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-09-24 18:29:59,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:29:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-09-24 18:29:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 18:29:59,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:59,963 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:59,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:59,964 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -594029260, now seen corresponding path program 1 times [2020-09-24 18:29:59,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:59,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530666474] [2020-09-24 18:29:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:00,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:00,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 18:30:00,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:30:00,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-09-24 18:30:00,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:30:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 18:30:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:30:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:30:00,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:30:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:00,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:00,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:00,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:30:00,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:00,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:30:00,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:30:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:30:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:30:00,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 18:30:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:00,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:00,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:00,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:00,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:00,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 18:30:00,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:00,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:30:00,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:30:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:30:00,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530666474] [2020-09-24 18:30:00,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:30:00,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 18:30:00,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772525424] [2020-09-24 18:30:00,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:30:00,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:30:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:30:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:30:00,607 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 8 states. [2020-09-24 18:30:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:30:00,761 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-09-24 18:30:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 18:30:00,762 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-09-24 18:30:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:30:00,765 INFO L225 Difference]: With dead ends: 59 [2020-09-24 18:30:00,765 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 18:30:00,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:30:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 18:30:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-09-24 18:30:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 18:30:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-09-24 18:30:00,784 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 42 [2020-09-24 18:30:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:30:00,785 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-09-24 18:30:00,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:30:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-09-24 18:30:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 18:30:00,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:30:00,789 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:30:00,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:30:00,789 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:30:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:30:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1318797830, now seen corresponding path program 1 times [2020-09-24 18:30:00,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:30:00,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011705121] [2020-09-24 18:30:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:30:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:01,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:01,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 18:30:01,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:01,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-09-24 18:30:01,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:01,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 18:30:01,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 18:30:01,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:30:01,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:01,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:30:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:01,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:01,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:01,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:30:01,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:01,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:30:01,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:01,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:30:01,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:01,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:30:01,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:01,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 18:30:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:01,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:01,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:01,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:01,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 18:30:01,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:30:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:30:01,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:30:01,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-24 18:30:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:01,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:01,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:01,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:01,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:01,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:30:01,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:30:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:01,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:30:01,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:30:01,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 18:30:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:30:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:30:01,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:30:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:30:01,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:30:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:30:01,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:30:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:30:01,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:30:01,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:30:01,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:30:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 18:30:01,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011705121] [2020-09-24 18:30:01,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:30:01,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 18:30:01,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56368361] [2020-09-24 18:30:01,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 18:30:01,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:30:01,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 18:30:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:30:01,543 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states. [2020-09-24 18:30:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:30:01,886 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-09-24 18:30:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 18:30:01,887 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-09-24 18:30:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:30:01,888 INFO L225 Difference]: With dead ends: 57 [2020-09-24 18:30:01,888 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 18:30:01,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-24 18:30:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 18:30:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 18:30:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 18:30:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 18:30:01,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-24 18:30:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:30:01,891 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 18:30:01,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 18:30:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 18:30:01,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 18:30:01,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:30:01,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 18:30:02,002 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 18:30:02,002 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 18:30:02,002 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 18:30:02,003 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 18:30:02,003 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 18:30:02,003 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 18:30:02,003 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 18:30:02,003 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 18:30:02,003 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point L27-1(lines 14 45) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-24 18:30:02,004 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L36(lines 36 37) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L28(lines 14 45) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-24 18:30:02,005 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L29(lines 14 45) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-09-24 18:30:02,006 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L38-3(lines 38 42) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L38-4(line 38) no Hoare annotation was computed. [2020-09-24 18:30:02,007 INFO L268 CegarLoopResult]: For program point L38-5(line 38) no Hoare annotation was computed. [2020-09-24 18:30:02,008 INFO L264 CegarLoopResult]: At program point L38-6(lines 38 42) the Hoare annotation is: (and (<= 0 main_~p~0) (<= 1 main_~leader_len~0) (<= (+ (* 2 main_~ielen~0) main_~p~0) (+ main_~bufsize_0~0 (* 2 main_~i~0)))) [2020-09-24 18:30:02,008 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-09-24 18:30:02,008 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-24 18:30:02,008 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-09-24 18:30:02,008 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-24 18:30:02,008 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-09-24 18:30:02,009 INFO L268 CegarLoopResult]: For program point L22-2(line 22) no Hoare annotation was computed. [2020-09-24 18:30:02,009 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 18:30:02,009 INFO L271 CegarLoopResult]: At program point L43(lines 13 45) the Hoare annotation is: true [2020-09-24 18:30:02,009 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 main_~p~0) (<= 1 main_~leader_len~0) (<= (+ (* 2 main_~ielen~0) main_~p~0) (+ main_~bufsize_0~0 (* 2 main_~i~0))) (<= (+ main_~p~0 2) main_~bufsize_0~0)) [2020-09-24 18:30:02,009 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 0 main_~p~0) (<= 1 main_~leader_len~0) (<= (+ (* 2 main_~ielen~0) main_~p~0) (+ main_~bufsize_0~0 (* 2 main_~i~0))) (<= (+ main_~p~0 2) main_~bufsize_0~0)) [2020-09-24 18:30:02,009 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-09-24 18:30:02,010 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 18:30:02,010 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 18:30:02,010 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 18:30:02,010 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 18:30:02,010 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 18:30:02,011 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 18:30:02,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:30:02 BoogieIcfgContainer [2020-09-24 18:30:02,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:30:02,040 INFO L168 Benchmark]: Toolchain (without parser) took 4134.09 ms. Allocated memory was 137.4 MB in the beginning and 251.1 MB in the end (delta: 113.8 MB). Free memory was 99.3 MB in the beginning and 195.7 MB in the end (delta: -96.5 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:30:02,040 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:30:02,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.73 ms. Allocated memory is still 137.4 MB. Free memory was 98.6 MB in the beginning and 89.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:30:02,043 INFO L168 Benchmark]: Boogie Preprocessor took 109.50 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 89.0 MB in the beginning and 178.8 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 18:30:02,044 INFO L168 Benchmark]: RCFGBuilder took 440.12 ms. Allocated memory is still 199.8 MB. Free memory was 178.8 MB in the beginning and 162.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-09-24 18:30:02,045 INFO L168 Benchmark]: TraceAbstraction took 3182.76 ms. Allocated memory was 199.8 MB in the beginning and 251.1 MB in the end (delta: 51.4 MB). Free memory was 161.6 MB in the beginning and 195.7 MB in the end (delta: -34.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-09-24 18:30:02,049 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 391.73 ms. Allocated memory is still 137.4 MB. Free memory was 98.6 MB in the beginning and 89.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.50 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 89.0 MB in the beginning and 178.8 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.12 ms. Allocated memory is still 199.8 MB. Free memory was 178.8 MB in the beginning and 162.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3182.76 ms. Allocated memory was 199.8 MB in the beginning and 251.1 MB in the end (delta: 51.4 MB). Free memory was 161.6 MB in the beginning and 195.7 MB in the end (delta: -34.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (0 <= p && 1 <= leader_len) && 2 * ielen + p <= bufsize_0 + 2 * i - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 60 SDslu, 695 SDs, 0 SdLazy, 278 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 23 NumberOfFragments, 70 HoareAnnotationTreeSize, 14 FomulaSimplifications, 113 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 15294 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 21/23 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...