/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:20,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:20,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:20,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:20,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:20,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:20,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:20,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:20,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:20,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:20,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:20,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:20,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:20,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:20,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:20,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:20,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:20,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:20,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:20,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:20,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:20,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:20,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:20,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:20,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:20,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:20,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:20,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:20,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:20,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:20,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:20,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:20,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:20,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:20,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:20,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:20,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:20,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:20,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:20,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:20,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:20,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:29:20,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:20,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:20,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:20,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:20,264 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:20,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:20,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:20,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:20,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:20,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:20,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:20,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:20,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:20,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:20,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:20,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:20,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:20,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:20,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:20,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:20,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:20,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:20,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:20,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:20,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:20,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:20,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:20,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:20,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:20,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:29:20,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:20,760 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:20,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:20,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:20,768 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:20,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 18:29:20,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9de9b120f/d779e4625b5c4a8aa0b30450071616eb/FLAG0825618af [2020-09-24 18:29:21,401 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:21,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 18:29:21,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9de9b120f/d779e4625b5c4a8aa0b30450071616eb/FLAG0825618af [2020-09-24 18:29:21,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9de9b120f/d779e4625b5c4a8aa0b30450071616eb [2020-09-24 18:29:21,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:21,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:21,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:21,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:21,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:21,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:21" (1/1) ... [2020-09-24 18:29:21,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3d6b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:21, skipping insertion in model container [2020-09-24 18:29:21,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:21" (1/1) ... [2020-09-24 18:29:21,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:21,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:22,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:22,062 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:22,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:22,096 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:22,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22 WrapperNode [2020-09-24 18:29:22,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:22,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:22,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:22,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:22,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:22,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:22,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:22,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:22,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (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 [2020-09-24 18:29:22,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:22,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:22,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:22,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:22,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 18:29:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:22,521 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:22,521 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:29:22,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:22 BoogieIcfgContainer [2020-09-24 18:29:22,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:22,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:22,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:22,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:22,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:21" (1/3) ... [2020-09-24 18:29:22,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eab174d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:22, skipping insertion in model container [2020-09-24 18:29:22,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (2/3) ... [2020-09-24 18:29:22,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eab174d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:22, skipping insertion in model container [2020-09-24 18:29:22,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:22" (3/3) ... [2020-09-24 18:29:22,536 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-24 18:29:22,549 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:22,562 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:22,593 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:22,633 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:22,633 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:22,634 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:22,634 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:22,634 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:22,635 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:22,635 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:22,635 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-24 18:29:22,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 18:29:22,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:22,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:22,674 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-24 18:29:22,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:22,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445784664] [2020-09-24 18:29:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:22,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:22,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 18:29:23,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:23,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-09-24 18:29:23,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 18:29:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:23,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:29:23,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:23,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:23,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:23,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445784664] [2020-09-24 18:29:23,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:23,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 18:29:23,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511930815] [2020-09-24 18:29:23,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 18:29:23,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:23,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 18:29:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 18:29:23,140 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-24 18:29:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:23,168 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-24 18:29:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 18:29:23,170 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 18:29:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:23,180 INFO L225 Difference]: With dead ends: 37 [2020-09-24 18:29:23,181 INFO L226 Difference]: Without dead ends: 20 [2020-09-24 18:29:23,184 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 [2020-09-24 18:29:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-24 18:29:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-24 18:29:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 18:29:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 18:29:23,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-24 18:29:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:23,232 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 18:29:23,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 18:29:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 18:29:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 18:29:23,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:23,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:23,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:23,234 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:23,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:23,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-24 18:29:23,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:23,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273498588] [2020-09-24 18:29:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 18:29:23,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-24 18:29:23,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:29:23,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:29:23,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:23,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:23,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:23,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:23,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:23,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:23,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:23,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273498588] [2020-09-24 18:29:23,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:23,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:29:23,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535045935] [2020-09-24 18:29:23,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:23,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:23,483 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 18:29:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:23,534 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-24 18:29:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:29:23,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 18:29:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:23,536 INFO L225 Difference]: With dead ends: 31 [2020-09-24 18:29:23,536 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 18:29:23,538 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 [2020-09-24 18:29:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 18:29:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-24 18:29:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 18:29:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-24 18:29:23,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-24 18:29:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:23,546 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-24 18:29:23,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-24 18:29:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 18:29:23,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:23,548 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] [2020-09-24 18:29:23,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:23,548 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-24 18:29:23,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860365997] [2020-09-24 18:29:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 18:29:23,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-09-24 18:29:23,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:29:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:29:23,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:24,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:24,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:24,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:24,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:24,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:24,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:24,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:24,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:24,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:24,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:24,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:24,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860365997] [2020-09-24 18:29:24,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:24,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:29:24,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875956848] [2020-09-24 18:29:24,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:29:24,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:29:24,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:24,183 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-24 18:29:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:24,404 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-24 18:29:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:29:24,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 18:29:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:24,407 INFO L225 Difference]: With dead ends: 48 [2020-09-24 18:29:24,408 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 18:29:24,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:29:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 18:29:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 18:29:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 18:29:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 18:29:24,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-24 18:29:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:24,422 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 18:29:24,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:29:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 18:29:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 18:29:24,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:24,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:24,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:29:24,425 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-24 18:29:24,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:24,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414596553] [2020-09-24 18:29:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:24,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:24,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 18:29:24,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:24,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 18:29:24,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:24,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:24,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:24,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:29:24,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:24,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:24,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:24,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:24,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:24,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:24,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:24,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414596553] [2020-09-24 18:29:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:24,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:29:24,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257613828] [2020-09-24 18:29:24,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:24,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:24,574 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 18:29:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:24,631 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-24 18:29:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:24,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 18:29:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:24,633 INFO L225 Difference]: With dead ends: 42 [2020-09-24 18:29:24,633 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 18:29:24,634 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 [2020-09-24 18:29:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 18:29:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-24 18:29:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 18:29:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 18:29:24,641 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-24 18:29:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:24,641 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 18:29:24,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 18:29:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 18:29:24,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:24,643 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] [2020-09-24 18:29:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:29:24,643 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-24 18:29:24,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818741149] [2020-09-24 18:29:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:24,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:24,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:24,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 18:29:24,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:24,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-24 18:29:24,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 18:29:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:29:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 18:29:24,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:25,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:25,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:25,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:25,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:25,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818741149] [2020-09-24 18:29:25,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:25,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 18:29:25,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750328634] [2020-09-24 18:29:25,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 18:29:25,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:25,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 18:29:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 18:29:25,160 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 18:29:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:25,577 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 18:29:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 18:29:25,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 18:29:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:25,578 INFO L225 Difference]: With dead ends: 42 [2020-09-24 18:29:25,579 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 18:29:25,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:29:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 18:29:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-24 18:29:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 18:29:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 18:29:25,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-24 18:29:25,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:25,587 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 18:29:25,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 18:29:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 18:29:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:29:25,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:25,588 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:25,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:29:25,589 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-24 18:29:25,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:25,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611489672] [2020-09-24 18:29:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:29:25,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-24 18:29:25,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:29:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 18:29:25,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:25,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:25,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:25,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:25,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:25,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:25,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611489672] [2020-09-24 18:29:25,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:25,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:29:25,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152489273] [2020-09-24 18:29:25,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:29:25,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:29:25,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:25,749 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 18:29:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:25,826 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-24 18:29:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:25,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-24 18:29:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:25,827 INFO L225 Difference]: With dead ends: 48 [2020-09-24 18:29:25,828 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 18:29:25,828 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 [2020-09-24 18:29:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 18:29:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-24 18:29:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 18:29:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-24 18:29:25,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-24 18:29:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:25,835 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-24 18:29:25,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:29:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-24 18:29:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 18:29:25,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:25,836 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] [2020-09-24 18:29:25,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:29:25,837 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-24 18:29:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:25,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938703654] [2020-09-24 18:29:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 18:29:26,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:26,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-24 18:29:26,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 18:29:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 18:29:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 18:29:26,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:26,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:26,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:26,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:26,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 18:29:26,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938703654] [2020-09-24 18:29:26,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:26,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 18:29:26,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046102945] [2020-09-24 18:29:26,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 18:29:26,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 18:29:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:29:26,471 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-24 18:29:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:26,816 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-24 18:29:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 18:29:26,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-24 18:29:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:26,817 INFO L225 Difference]: With dead ends: 47 [2020-09-24 18:29:26,818 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 18:29:26,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 18:29:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 18:29:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 18:29:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 18:29:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 18:29:26,829 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-24 18:29:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:26,829 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 18:29:26,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 18:29:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 18:29:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 18:29:26,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:26,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:26,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:29:26,832 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-24 18:29:26,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:26,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205041796] [2020-09-24 18:29:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 18:29:27,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:27,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-24 18:29:27,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 18:29:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:27,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:27,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:27,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:27,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:27,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205041796] [2020-09-24 18:29:27,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:27,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:29:27,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935957203] [2020-09-24 18:29:27,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:29:27,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:29:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:27,088 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-24 18:29:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:27,188 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-24 18:29:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:29:27,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-24 18:29:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:27,189 INFO L225 Difference]: With dead ends: 60 [2020-09-24 18:29:27,189 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 18:29:27,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:29:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 18:29:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 18:29:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 18:29:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-24 18:29:27,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-24 18:29:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:27,196 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-24 18:29:27,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:29:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-24 18:29:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 18:29:27,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:27,198 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:27,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:29:27,198 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:27,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-24 18:29:27,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:27,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177156012] [2020-09-24 18:29:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 18:29:27,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:27,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-09-24 18:29:27,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 18:29:27,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:27,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:27,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:27,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:27,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:27,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:27,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:27,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177156012] [2020-09-24 18:29:27,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:27,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:29:27,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593655358] [2020-09-24 18:29:27,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:29:27,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:29:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:27,552 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-24 18:29:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:27,691 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-24 18:29:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 18:29:27,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-24 18:29:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:27,693 INFO L225 Difference]: With dead ends: 66 [2020-09-24 18:29:27,693 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 18:29:27,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:29:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 18:29:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 18:29:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 18:29:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-24 18:29:27,706 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-24 18:29:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:27,707 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-24 18:29:27,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:29:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-24 18:29:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 18:29:27,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:27,710 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:27,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:29:27,711 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-24 18:29:27,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:27,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187684936] [2020-09-24 18:29:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 18:29:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-09-24 18:29:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 18:29:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 18:29:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:28,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:28,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:28,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:28,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:28,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:28,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:28,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:28,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:28,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187684936] [2020-09-24 18:29:28,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:28,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 18:29:28,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176295264] [2020-09-24 18:29:28,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 18:29:28,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 18:29:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:29:28,201 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-24 18:29:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:28,382 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-24 18:29:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:29:28,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-24 18:29:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:28,383 INFO L225 Difference]: With dead ends: 72 [2020-09-24 18:29:28,384 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 18:29:28,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:29:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 18:29:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-24 18:29:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 18:29:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 18:29:28,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-24 18:29:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:28,398 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 18:29:28,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 18:29:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 18:29:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 18:29:28,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:28,400 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:28,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:29:28,400 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-24 18:29:28,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:28,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683828967] [2020-09-24 18:29:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:28,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:28,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 18:29:28,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-09-24 18:29:28,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 18:29:28,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 18:29:28,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:28,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:28,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:28,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:28,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:28,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:28,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:28,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:28,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:28,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683828967] [2020-09-24 18:29:28,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:28,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 18:29:28,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864906809] [2020-09-24 18:29:28,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 18:29:28,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:28,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 18:29:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:29:28,996 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-24 18:29:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:29,227 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-24 18:29:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 18:29:29,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-24 18:29:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:29,229 INFO L225 Difference]: With dead ends: 78 [2020-09-24 18:29:29,229 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 18:29:29,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 18:29:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 18:29:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-24 18:29:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 18:29:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 18:29:29,243 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-24 18:29:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:29,243 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 18:29:29,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 18:29:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 18:29:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 18:29:29,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:29,247 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:29,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 18:29:29,247 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-24 18:29:29,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:29,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125918503] [2020-09-24 18:29:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:29,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 18:29:29,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:29,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-09-24 18:29:29,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 18:29:29,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:29,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 18:29:29,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:29,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:29,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:29,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:29,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:29,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:29,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:29,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125918503] [2020-09-24 18:29:29,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:29,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 18:29:29,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738347739] [2020-09-24 18:29:29,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 18:29:29,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 18:29:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 18:29:29,928 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-24 18:29:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:30,178 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-24 18:29:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 18:29:30,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-24 18:29:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:30,179 INFO L225 Difference]: With dead ends: 84 [2020-09-24 18:29:30,179 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 18:29:30,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 18:29:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 18:29:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-24 18:29:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 18:29:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-24 18:29:30,187 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-24 18:29:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:30,187 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-24 18:29:30,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 18:29:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-24 18:29:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 18:29:30,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:30,188 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:30,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 18:29:30,189 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-24 18:29:30,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:30,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320109590] [2020-09-24 18:29:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:30,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:30,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:29:30,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:30,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-09-24 18:29:30,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:30,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 18:29:30,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:30,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 18:29:30,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:30,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:30,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:30,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:30,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:30,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:30,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:30,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:30,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:30,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:30,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320109590] [2020-09-24 18:29:30,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:30,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 18:29:30,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547688556] [2020-09-24 18:29:30,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 18:29:30,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 18:29:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:29:30,960 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-24 18:29:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:31,317 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-24 18:29:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 18:29:31,321 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-24 18:29:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:31,322 INFO L225 Difference]: With dead ends: 89 [2020-09-24 18:29:31,322 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 18:29:31,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 18:29:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 18:29:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 18:29:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 18:29:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 18:29:31,332 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-24 18:29:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:31,332 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 18:29:31,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 18:29:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 18:29:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 18:29:31,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:31,333 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:31,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 18:29:31,334 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-24 18:29:31,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:31,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780970680] [2020-09-24 18:29:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:29:31,352 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:29:31,352 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:29:31,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 18:29:31,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:29:31 BoogieIcfgContainer [2020-09-24 18:29:31,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:29:31,382 INFO L168 Benchmark]: Toolchain (without parser) took 9592.10 ms. Allocated memory was 147.3 MB in the beginning and 295.2 MB in the end (delta: 147.8 MB). Free memory was 103.5 MB in the beginning and 196.9 MB in the end (delta: -93.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:31,383 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:29:31,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.59 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:31,384 INFO L168 Benchmark]: Boogie Preprocessor took 123.55 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 182.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:31,385 INFO L168 Benchmark]: RCFGBuilder took 305.68 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:31,386 INFO L168 Benchmark]: TraceAbstraction took 8850.82 ms. Allocated memory was 203.4 MB in the beginning and 295.2 MB in the end (delta: 91.8 MB). Free memory was 169.6 MB in the beginning and 196.9 MB in the end (delta: -27.3 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:31,389 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.59 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.55 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 182.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.68 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8850.82 ms. Allocated memory was 203.4 MB in the beginning and 295.2 MB in the end (delta: 91.8 MB). Free memory was 169.6 MB in the beginning and 196.9 MB in the end (delta: -27.3 MB). Peak memory consumption was 64.4 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] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 201 SDslu, 1069 SDs, 0 SdLazy, 775 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 547 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 461 ConstructedInterpolants, 0 QuantifiedInterpolants, 60623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 160/758 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...