/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/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:06:27,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:06:27,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:06:27,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:06:27,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:06:27,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:06:27,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:06:27,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:06:27,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:06:27,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:06:27,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:06:27,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:06:27,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:06:27,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:06:27,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:06:27,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:06:27,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:06:27,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:06:27,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:06:27,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:06:27,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:06:27,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:06:27,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:06:27,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:06:27,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:06:27,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:06:27,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:06:27,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:06:27,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:06:27,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:06:27,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:06:27,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:06:27,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:06:27,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:06:27,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:06:27,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:06:27,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:06:27,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:06:27,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:06:27,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:06:27,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:06:27,188 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 16:06:27,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:06:27,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:06:27,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:06:27,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:06:27,232 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:06:27,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:06:27,233 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:06:27,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:06:27,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:06:27,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:06:27,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:06:27,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:06:27,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:06:27,235 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:06:27,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:06:27,236 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:06:27,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:06:27,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:06:27,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:06:27,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:06:27,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:06:27,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:06:27,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:06:27,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:06:27,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:06:27,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:06:27,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:06:27,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:06:27,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:06:27,239 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 16:06:27,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:06:27,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:06:27,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:06:27,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:06:27,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:06:27,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-10-12 16:06:27,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92cf19b34/7ae593ea42454a19a961bf40e094fb25/FLAGe2ca4fc25 [2020-10-12 16:06:28,066 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:06:28,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-10-12 16:06:28,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92cf19b34/7ae593ea42454a19a961bf40e094fb25/FLAGe2ca4fc25 [2020-10-12 16:06:28,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92cf19b34/7ae593ea42454a19a961bf40e094fb25 [2020-10-12 16:06:28,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:06:28,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:06:28,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:06:28,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:06:28,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:06:28,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54535c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28, skipping insertion in model container [2020-10-12 16:06:28,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:06:28,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:06:28,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:06:28,684 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:06:28,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:06:28,722 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:06:28,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28 WrapperNode [2020-10-12 16:06:28,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:06:28,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:06:28,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:06:28,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:06:28,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (1/1) ... [2020-10-12 16:06:28,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:06:28,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:06:28,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:06:28,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:06:28,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (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 16:06:28,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:06:28,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:06:28,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:06:28,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:06:28,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:06:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:06:28,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:06:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:06:28,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:06:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:06:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:06:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:06:28,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:06:29,180 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:06:29,181 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:06:29,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:06:29 BoogieIcfgContainer [2020-10-12 16:06:29,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:06:29,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:06:29,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:06:29,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:06:29,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:06:28" (1/3) ... [2020-10-12 16:06:29,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e29fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:06:29, skipping insertion in model container [2020-10-12 16:06:29,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:06:28" (2/3) ... [2020-10-12 16:06:29,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e29fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:06:29, skipping insertion in model container [2020-10-12 16:06:29,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:06:29" (3/3) ... [2020-10-12 16:06:29,193 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-10-12 16:06:29,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:06:29,212 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:06:29,227 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:06:29,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:06:29,292 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:06:29,292 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:06:29,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:06:29,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:06:29,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:06:29,295 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:06:29,295 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:06:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-12 16:06:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:06:29,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:29,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:29,342 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 826978896, now seen corresponding path program 1 times [2020-10-12 16:06:29,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:29,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934648438] [2020-10-12 16:06:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:29,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:29,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:29,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:06:29,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:29,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 16:06:29,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:29,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:06:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:06:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:06:29,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:06:29,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:29,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:29,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:29,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:29,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:06:29,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:29,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:29,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:29,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934648438] [2020-10-12 16:06:29,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:06:29,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:06:29,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968605968] [2020-10-12 16:06:29,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:06:29,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:29,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:06:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:06:29,709 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-10-12 16:06:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:29,816 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-12 16:06:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:06:29,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-12 16:06:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:29,829 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:06:29,829 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:06:29,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:06:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:06:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-12 16:06:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:06:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-12 16:06:29,878 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2020-10-12 16:06:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:29,879 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-12 16:06:29,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:06:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-12 16:06:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:06:29,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:29,880 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:29,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:06:29,881 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1747164342, now seen corresponding path program 1 times [2020-10-12 16:06:29,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:29,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597010458] [2020-10-12 16:06:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:29,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:06:30,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:30,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-12 16:06:30,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:06:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:06:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:06:30,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 16:06:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:30,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:30,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:30,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:30,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:30,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:30,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:30,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 16:06:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:30,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:06:30,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:30,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 16:06:30,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:06:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:06:30,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:06:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:06:30,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597010458] [2020-10-12 16:06:30,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:06:30,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:06:30,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885565351] [2020-10-12 16:06:30,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:06:30,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:06:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:06:30,255 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-12 16:06:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:30,332 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-12 16:06:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:06:30,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 16:06:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:30,337 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:06:30,337 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:06:30,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:06:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:06:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 16:06:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:06:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-12 16:06:30,346 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-10-12 16:06:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:30,347 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-12 16:06:30,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:06:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-12 16:06:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:06:30,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:06:30,349 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:06:30,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:06:30,349 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:06:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:06:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1285061104, now seen corresponding path program 1 times [2020-10-12 16:06:30,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:06:30,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170726570] [2020-10-12 16:06:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:06:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:30,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:06:30,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:06:30,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-12 16:06:30,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:06:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:06:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:06:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:06:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:30,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:06:30,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:30,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:06:30,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:06:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:30,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:06:30,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:30,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 16:06:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:06:30,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:06:30,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:06:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:06:30,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:30,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 16:06:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:06:30,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:06:30,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:06:30,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:06:30,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:06:30,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:06:30,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:06:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:06:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:06:30,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:06:30,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:06:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:06:30,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170726570] [2020-10-12 16:06:30,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:06:30,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:06:30,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250774270] [2020-10-12 16:06:30,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:06:30,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:06:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:06:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:06:30,635 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-10-12 16:06:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:06:30,739 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-12 16:06:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:06:30,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 16:06:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:06:30,741 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:06:30,741 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 16:06:30,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:06:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 16:06:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 16:06:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 16:06:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 16:06:30,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-12 16:06:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:06:30,743 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 16:06:30,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:06:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 16:06:30,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 16:06:30,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:06:30,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 16:06:30,859 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-12 16:06:30,859 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:06:30,859 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:06:30,859 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 16:06:30,859 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 16:06:30,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:06:30,860 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-12 16:06:30,860 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-12 16:06:30,860 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-12 16:06:30,860 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-12 16:06:30,860 INFO L271 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-10-12 16:06:30,861 INFO L268 CegarLoopResult]: For program point L31(lines 27 32) no Hoare annotation was computed. [2020-10-12 16:06:30,861 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-10-12 16:06:30,861 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 34) the Hoare annotation is: true [2020-10-12 16:06:30,861 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-10-12 16:06:30,861 INFO L264 CegarLoopResult]: At program point L27-2(lines 27 32) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-10-12 16:06:30,862 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 34) no Hoare annotation was computed. [2020-10-12 16:06:30,862 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-12 16:06:30,862 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-12 16:06:30,862 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 34) no Hoare annotation was computed. [2020-10-12 16:06:30,862 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-12 16:06:30,862 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-12 16:06:30,863 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-12 16:06:30,863 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-12 16:06:30,863 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-12 16:06:30,863 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-12 16:06:30,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:06:30 BoogieIcfgContainer [2020-10-12 16:06:30,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:06:30,885 INFO L168 Benchmark]: Toolchain (without parser) took 2431.95 ms. Allocated memory was 140.5 MB in the beginning and 232.8 MB in the end (delta: 92.3 MB). Free memory was 103.8 MB in the beginning and 154.7 MB in the end (delta: -50.9 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. [2020-10-12 16:06:30,886 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-12 16:06:30,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.36 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-12 16:06:30,888 INFO L168 Benchmark]: Boogie Preprocessor took 187.10 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 94.1 MB in the beginning and 187.6 MB in the end (delta: -93.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-10-12 16:06:30,889 INFO L168 Benchmark]: RCFGBuilder took 273.13 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 173.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-10-12 16:06:30,890 INFO L168 Benchmark]: TraceAbstraction took 1695.84 ms. Allocated memory was 207.6 MB in the beginning and 232.8 MB in the end (delta: 25.2 MB). Free memory was 173.1 MB in the beginning and 154.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:06:30,894 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.36 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 187.10 ms. Allocated memory was 140.5 MB in the beginning and 207.6 MB in the end (delta: 67.1 MB). Free memory was 94.1 MB in the beginning and 187.6 MB in the end (delta: -93.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.13 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 173.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1695.84 ms. Allocated memory was 207.6 MB in the beginning and 232.8 MB in the end (delta: 25.2 MB). Free memory was 173.1 MB in the beginning and 154.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 43.6 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: glob2_pathlim_off <= MAXPATHLEN && 0 <= glob2_p_off - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 24 SDslu, 162 SDs, 0 SdLazy, 115 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 22 NumberOfFragments, 33 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 36 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1668 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 8/12 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...