/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:43:20,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:43:20,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:43:20,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:43:20,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:43:20,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:43:20,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:43:20,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:43:20,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:43:20,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:43:20,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:43:20,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:43:20,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:43:20,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:43:20,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:43:20,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:43:20,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:43:20,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:43:20,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:43:20,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:43:20,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:43:20,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:43:20,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:43:20,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:43:20,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:43:20,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:43:20,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:43:20,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:43:20,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:43:20,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:43:20,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:43:20,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:43:20,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:43:20,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:43:20,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:43:20,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:43:20,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:43:20,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:43:20,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:43:20,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:43:20,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:43:20,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 05:43:20,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:43:20,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:43:20,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:43:20,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:43:20,234 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:43:20,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:43:20,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:43:20,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:43:20,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:43:20,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:43:20,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:43:20,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:43:20,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:43:20,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:43:20,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:43:20,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:43:20,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:43:20,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:43:20,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:43:20,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:43:20,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:43:20,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:43:20,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:43:20,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:43:20,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:43:20,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:43:20,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:43:20,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:43:20,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:43:20,240 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:43:20,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:43:20,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:43:20,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:43:20,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:43:20,764 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:43:20,765 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 05:43:20,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7666ec28/c705423076664a078b5621a05e1283ba/FLAGbb3222b57 [2020-09-25 05:43:21,388 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:43:21,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-25 05:43:21,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7666ec28/c705423076664a078b5621a05e1283ba/FLAGbb3222b57 [2020-09-25 05:43:21,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7666ec28/c705423076664a078b5621a05e1283ba [2020-09-25 05:43:21,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:43:21,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:43:21,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:21,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:43:21,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:43:21,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:21" (1/1) ... [2020-09-25 05:43:21,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:21, skipping insertion in model container [2020-09-25 05:43:21,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:43:21" (1/1) ... [2020-09-25 05:43:21,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:43:21,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:43:21,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:22,000 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:43:22,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:43:22,034 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:43:22,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22 WrapperNode [2020-09-25 05:43:22,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:43:22,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:43:22,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:43:22,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:43:22,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... [2020-09-25 05:43:22,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:43:22,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:43:22,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:43:22,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:43:22,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:43:22,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:43:22,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:43:22,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:43:22,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:43:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:43:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:43:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 05:43:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:43:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:43:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:43:22,447 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:43:22,448 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 05:43:22,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:22 BoogieIcfgContainer [2020-09-25 05:43:22,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:43:22,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:43:22,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:43:22,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:43:22,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:43:21" (1/3) ... [2020-09-25 05:43:22,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5041f980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:43:22, skipping insertion in model container [2020-09-25 05:43:22,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:43:22" (2/3) ... [2020-09-25 05:43:22,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5041f980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:43:22, skipping insertion in model container [2020-09-25 05:43:22,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:43:22" (3/3) ... [2020-09-25 05:43:22,464 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-25 05:43:22,477 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:43:22,488 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:43:22,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:43:22,563 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:43:22,563 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:43:22,564 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:43:22,564 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:43:22,564 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:43:22,564 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:43:22,565 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:43:22,565 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:43:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 05:43:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 05:43:22,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:22,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:22,615 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-25 05:43:22,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:22,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045759152] [2020-09-25 05:43:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:22,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:22,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 05:43:22,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:43:22,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-25 05:43:22,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:22,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 05:43:22,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:43:23,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:23,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:23,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:23,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:23,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:23,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:23,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:23,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:23,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:23,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045759152] [2020-09-25 05:43:23,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:23,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 05:43:23,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334287473] [2020-09-25 05:43:23,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 05:43:23,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 05:43:23,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 05:43:23,071 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-25 05:43:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:23,105 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-25 05:43:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 05:43:23,107 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 05:43:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:23,120 INFO L225 Difference]: With dead ends: 38 [2020-09-25 05:43:23,120 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 05:43:23,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 05:43:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 05:43:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 05:43:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 05:43:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-25 05:43:23,196 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-09-25 05:43:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:23,197 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-25 05:43:23,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 05:43:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-25 05:43:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 05:43:23,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:23,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:23,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:43:23,200 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-09-25 05:43:23,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:23,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248338142] [2020-09-25 05:43:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:23,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:23,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 05:43:23,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:23,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-25 05:43:23,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:23,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:43:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 05:43:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:43:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:23,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:23,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:23,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:23,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:23,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:23,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:43:23,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:23,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:23,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:23,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248338142] [2020-09-25 05:43:23,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:23,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:43:23,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201929636] [2020-09-25 05:43:23,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:43:23,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:43:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:43:23,486 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-25 05:43:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:23,561 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-25 05:43:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:43:23,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 05:43:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:23,563 INFO L225 Difference]: With dead ends: 28 [2020-09-25 05:43:23,563 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 05:43:23,565 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 [2020-09-25 05:43:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 05:43:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 05:43:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 05:43:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 05:43:23,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-25 05:43:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:23,572 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 05:43:23,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:43:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 05:43:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 05:43:23,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:23,574 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] [2020-09-25 05:43:23,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:43:23,574 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-25 05:43:23,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:23,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631038934] [2020-09-25 05:43:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:23,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:23,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 05:43:23,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-25 05:43:23,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:23,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:43:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 05:43:23,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 05:43:23,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:24,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:24,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:24,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:24,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:24,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:24,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:24,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631038934] [2020-09-25 05:43:24,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:24,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:43:24,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092225811] [2020-09-25 05:43:24,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:43:24,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:43:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:43:24,062 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-25 05:43:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:24,335 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-25 05:43:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 05:43:24,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 05:43:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:24,337 INFO L225 Difference]: With dead ends: 34 [2020-09-25 05:43:24,337 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 05:43:24,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-09-25 05:43:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 05:43:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-25 05:43:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 05:43:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 05:43:24,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-25 05:43:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:24,345 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 05:43:24,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:43:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 05:43:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 05:43:24,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:24,346 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] [2020-09-25 05:43:24,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:43:24,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-25 05:43:24,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:24,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36148450] [2020-09-25 05:43:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:24,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:24,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 05:43:24,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:24,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 05:43:24,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:24,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:43:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 05:43:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 05:43:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:24,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:24,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:24,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:24,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:24,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:24,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:24,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:24,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:24,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:24,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:24,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:24,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:24,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36148450] [2020-09-25 05:43:24,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:43:24,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 05:43:24,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273091904] [2020-09-25 05:43:24,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 05:43:24,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 05:43:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:43:24,425 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-25 05:43:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:24,446 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-25 05:43:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 05:43:24,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-25 05:43:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:24,448 INFO L225 Difference]: With dead ends: 40 [2020-09-25 05:43:24,448 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 05:43:24,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:43:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 05:43:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 05:43:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 05:43:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 05:43:24,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-25 05:43:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:24,454 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 05:43:24,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 05:43:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 05:43:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 05:43:24,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:24,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:24,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:43:24,457 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-25 05:43:24,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:24,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594726837] [2020-09-25 05:43:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:24,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:24,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 05:43:24,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:24,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-09-25 05:43:24,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:24,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 05:43:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 05:43:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 05:43:24,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:24,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:24,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:24,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:24,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:24,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:24,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:24,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:24,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:24,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594726837] [2020-09-25 05:43:24,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:24,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 05:43:24,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64101636] [2020-09-25 05:43:24,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 05:43:24,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 05:43:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 05:43:24,963 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 05:43:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:25,392 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-25 05:43:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 05:43:25,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 05:43:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:25,394 INFO L225 Difference]: With dead ends: 41 [2020-09-25 05:43:25,394 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 05:43:25,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 05:43:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 05:43:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-25 05:43:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 05:43:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-25 05:43:25,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-25 05:43:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:25,402 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-25 05:43:25,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 05:43:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-25 05:43:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 05:43:25,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:25,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:25,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:43:25,404 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-25 05:43:25,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:25,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530995750] [2020-09-25 05:43:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:25,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:25,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:25,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 05:43:25,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:25,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-25 05:43:25,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:25,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:43:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 05:43:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 05:43:25,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:25,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:25,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:25,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:25,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:25,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:43:25,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:25,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:25,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:25,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:25,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:25,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530995750] [2020-09-25 05:43:25,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:25,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 05:43:25,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643104044] [2020-09-25 05:43:25,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:43:25,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:43:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:43:25,526 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-09-25 05:43:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:25,574 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-25 05:43:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:43:25,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-25 05:43:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:25,576 INFO L225 Difference]: With dead ends: 46 [2020-09-25 05:43:25,576 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 05:43:25,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:43:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 05:43:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-25 05:43:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 05:43:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 05:43:25,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-09-25 05:43:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:25,583 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 05:43:25,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:43:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 05:43:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 05:43:25,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:25,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:25,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:43:25,585 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2001266491, now seen corresponding path program 3 times [2020-09-25 05:43:25,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:25,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732644649] [2020-09-25 05:43:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:25,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:25,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 05:43:25,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:25,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-09-25 05:43:25,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:25,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 05:43:25,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 05:43:25,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 05:43:25,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:26,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:26,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:26,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:26,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:43:26,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:26,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:26,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:26,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 05:43:26,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732644649] [2020-09-25 05:43:26,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:26,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 05:43:26,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419481296] [2020-09-25 05:43:26,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 05:43:26,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 05:43:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 05:43:26,132 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 05:43:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:26,438 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-25 05:43:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 05:43:26,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 05:43:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:26,440 INFO L225 Difference]: With dead ends: 46 [2020-09-25 05:43:26,440 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 05:43:26,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 05:43:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 05:43:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-25 05:43:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 05:43:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-25 05:43:26,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-09-25 05:43:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:26,447 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-25 05:43:26,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 05:43:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-25 05:43:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:43:26,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:26,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:26,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 05:43:26,449 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-25 05:43:26,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:26,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217189860] [2020-09-25 05:43:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:26,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:26,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 05:43:26,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:26,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 05:43:26,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:26,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:26,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:43:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 05:43:26,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:43:26,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:26,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:43:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:43:26,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:43:26,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:43:26,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:43:26,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:43:26,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:43:26,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:43:26,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:43:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:43:26,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:43:26,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:43:26,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:43:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:43:26,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217189860] [2020-09-25 05:43:26,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:43:26,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:43:26,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488906051] [2020-09-25 05:43:26,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:43:26,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:43:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:43:26,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:43:26,635 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-25 05:43:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:43:26,714 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-25 05:43:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:43:26,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 05:43:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:43:26,715 INFO L225 Difference]: With dead ends: 56 [2020-09-25 05:43:26,715 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 05:43:26,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:43:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 05:43:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 05:43:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 05:43:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 05:43:26,726 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-25 05:43:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:43:26,726 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 05:43:26,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:43:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 05:43:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 05:43:26,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:43:26,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:43:26,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 05:43:26,732 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:43:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:43:26,732 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-25 05:43:26,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:43:26,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706810619] [2020-09-25 05:43:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:43:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:43:26,746 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:43:26,746 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:43:26,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 05:43:26,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:43:26 BoogieIcfgContainer [2020-09-25 05:43:26,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:43:26,795 INFO L168 Benchmark]: Toolchain (without parser) took 5067.22 ms. Allocated memory was 145.8 MB in the beginning and 248.0 MB in the end (delta: 102.2 MB). Free memory was 102.3 MB in the beginning and 164.8 MB in the end (delta: -62.5 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:26,796 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:43:26,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.42 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:26,798 INFO L168 Benchmark]: Boogie Preprocessor took 119.38 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.3 MB in the beginning and 181.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:26,799 INFO L168 Benchmark]: RCFGBuilder took 297.54 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 169.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:26,803 INFO L168 Benchmark]: TraceAbstraction took 4329.02 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 168.4 MB in the beginning and 164.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2020-09-25 05:43:26,813 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.42 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.38 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.3 MB in the beginning and 181.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.54 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 169.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4329.02 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 168.4 MB in the beginning and 164.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 9, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 48 SDslu, 468 SDs, 0 SdLazy, 421 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=8, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 226 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 21754 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 23/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...