/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 [2020-09-25 12:31:27,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:27,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:27,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:27,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:27,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:27,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:27,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:27,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:27,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:27,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:27,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:27,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:27,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:27,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:27,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:27,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:27,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:27,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:27,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:27,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:27,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:27,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:27,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:27,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:27,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:27,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:27,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:27,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:27,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:27,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:27,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:27,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:27,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:27,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:27,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:27,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:27,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:27,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:27,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:27,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:27,234 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 [2020-09-25 12:31:27,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:27,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:27,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:27,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:27,262 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:27,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:27,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:27,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:27,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:27,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:27,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:27,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:27,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:27,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:27,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:27,265 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:27,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:27,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:27,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:27,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:27,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:27,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:27,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:27,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:27,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:27,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:27,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:27,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:27,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:27,267 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:31:27,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:27,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:27,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:27,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:27,827 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:27,828 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 12:31:27,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bba634000/97fcbb75dc9643289032d9f4718cfa4a/FLAGded28362c [2020-09-25 12:31:28,424 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:28,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 12:31:28,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bba634000/97fcbb75dc9643289032d9f4718cfa4a/FLAGded28362c [2020-09-25 12:31:28,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bba634000/97fcbb75dc9643289032d9f4718cfa4a [2020-09-25 12:31:28,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:28,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:28,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:28,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:28,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:28,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:28" (1/1) ... [2020-09-25 12:31:28,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f43d38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:28, skipping insertion in model container [2020-09-25 12:31:28,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:28" (1/1) ... [2020-09-25 12:31:28,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:28,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:29,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:29,056 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:29,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:29,097 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:29,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29 WrapperNode [2020-09-25 12:31:29,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:29,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:29,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:29,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:29,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... [2020-09-25 12:31:29,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:29,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:29,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:29,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:29,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:29,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 12:31:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:29,575 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:29,575 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:31:29,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:29 BoogieIcfgContainer [2020-09-25 12:31:29,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:29,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:29,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:29,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:29,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:28" (1/3) ... [2020-09-25 12:31:29,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f1e7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:29, skipping insertion in model container [2020-09-25 12:31:29,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:29" (2/3) ... [2020-09-25 12:31:29,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f1e7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:29, skipping insertion in model container [2020-09-25 12:31:29,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:29" (3/3) ... [2020-09-25 12:31:29,592 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-25 12:31:29,607 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:29,619 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:29,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:29,701 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:29,701 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:29,702 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:29,702 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:29,702 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:29,702 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:29,703 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:29,703 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 12:31:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 12:31:29,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:29,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:29,752 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-25 12:31:29,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:29,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107734605] [2020-09-25 12:31:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:29,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:30,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:30,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 12:31:30,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-09-25 12:31:30,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:30,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:30,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:30,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:31:30,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:31:30,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:30,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:30,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:30,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:30,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:30,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:30,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:30,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:30,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:30,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:30,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:30,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:30,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107734605] [2020-09-25 12:31:30,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:30,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:31:30,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861530813] [2020-09-25 12:31:30,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:30,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:30,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:30,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:30,295 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-09-25 12:31:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:30,410 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-25 12:31:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:31:30,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 12:31:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:30,424 INFO L225 Difference]: With dead ends: 50 [2020-09-25 12:31:30,424 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 12:31:30,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:31:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 12:31:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-25 12:31:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 12:31:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-25 12:31:30,475 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-25 12:31:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:30,475 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-25 12:31:30,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-25 12:31:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 12:31:30,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:30,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:30,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:30,478 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-25 12:31:30,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:30,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823832012] [2020-09-25 12:31:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:30,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:30,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:30,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 12:31:30,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:30,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-09-25 12:31:30,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:30,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:31:30,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 12:31:30,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:31,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:31,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:31,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:31,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:31,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:31,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:31,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:31,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823832012] [2020-09-25 12:31:31,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:31,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:31:31,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561171287] [2020-09-25 12:31:31,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:31:31,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:31:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:31,167 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-25 12:31:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:31,421 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-25 12:31:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:31:31,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 12:31:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:31,424 INFO L225 Difference]: With dead ends: 48 [2020-09-25 12:31:31,424 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 12:31:31,427 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 [2020-09-25 12:31:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 12:31:31,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 12:31:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 12:31:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 12:31:31,437 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-25 12:31:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:31,438 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 12:31:31,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:31:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 12:31:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 12:31:31,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:31,441 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] [2020-09-25 12:31:31,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:31,442 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-25 12:31:31,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:31,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535796303] [2020-09-25 12:31:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:31,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 12:31:31,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:31,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-25 12:31:31,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:31,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 12:31:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:31,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:31,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:31,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:31,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:31,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:31,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535796303] [2020-09-25 12:31:31,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:31,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:31:31,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047298417] [2020-09-25 12:31:31,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:31,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:31,615 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 12:31:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:31,666 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-25 12:31:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:31:31,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 12:31:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:31,668 INFO L225 Difference]: With dead ends: 42 [2020-09-25 12:31:31,668 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 12:31:31,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:31:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 12:31:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 12:31:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 12:31:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 12:31:31,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-25 12:31:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:31,675 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 12:31:31,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 12:31:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 12:31:31,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:31,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:31,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:31:31,677 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-25 12:31:31,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:31,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000933555] [2020-09-25 12:31:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:31,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:31,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 12:31:31,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-25 12:31:31,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:31,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 12:31:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:31:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 12:31:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:32,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:32,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:32,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000933555] [2020-09-25 12:31:32,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:32,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 12:31:32,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779929772] [2020-09-25 12:31:32,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 12:31:32,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:32,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 12:31:32,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:31:32,177 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 12:31:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:32,598 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 12:31:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 12:31:32,598 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 12:31:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:32,599 INFO L225 Difference]: With dead ends: 42 [2020-09-25 12:31:32,600 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 12:31:32,600 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 [2020-09-25 12:31:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 12:31:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-25 12:31:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 12:31:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 12:31:32,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-25 12:31:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:32,607 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 12:31:32,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 12:31:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 12:31:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 12:31:32,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:32,608 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] [2020-09-25 12:31:32,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:31:32,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-25 12:31:32,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:32,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195388032] [2020-09-25 12:31:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 12:31:32,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-25 12:31:32,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:31:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 12:31:32,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:32,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:32,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:32,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:32,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:32,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:32,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:32,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195388032] [2020-09-25 12:31:32,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:32,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:31:32,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741497173] [2020-09-25 12:31:32,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:31:32,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:31:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:31:32,772 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 12:31:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:32,867 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 12:31:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 12:31:32,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-25 12:31:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:32,868 INFO L225 Difference]: With dead ends: 48 [2020-09-25 12:31:32,869 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 12:31:32,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 12:31:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 12:31:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 12:31:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 12:31:32,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-25 12:31:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:32,876 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 12:31:32,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:31:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 12:31:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 12:31:32,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:32,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:32,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:31:32,878 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-25 12:31:32,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:32,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701832278] [2020-09-25 12:31:32,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 12:31:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 12:31:33,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:31:33,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:33,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:33,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 12:31:33,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701832278] [2020-09-25 12:31:33,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:33,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:31:33,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317334527] [2020-09-25 12:31:33,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:31:33,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:31:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:33,481 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 12:31:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:33,815 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-25 12:31:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:31:33,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 12:31:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:33,817 INFO L225 Difference]: With dead ends: 47 [2020-09-25 12:31:33,817 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 12:31:33,818 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 [2020-09-25 12:31:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 12:31:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-25 12:31:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 12:31:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 12:31:33,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-25 12:31:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:33,824 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 12:31:33,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:31:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 12:31:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 12:31:33,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,826 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] [2020-09-25 12:31:33,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:31:33,826 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-25 12:31:33,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148936879] [2020-09-25 12:31:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 12:31:34,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-25 12:31:34,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:31:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:34,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 12:31:34,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:34,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:31:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:34,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148936879] [2020-09-25 12:31:34,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:31:34,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598208295] [2020-09-25 12:31:34,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:31:34,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:31:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:31:34,079 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-25 12:31:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,204 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 12:31:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:31:34,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-25 12:31:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,206 INFO L225 Difference]: With dead ends: 60 [2020-09-25 12:31:34,206 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 12:31:34,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:31:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 12:31:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 12:31:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 12:31:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-25 12:31:34,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-25 12:31:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,218 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-25 12:31:34,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:31:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-25 12:31:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 12:31:34,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,222 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] [2020-09-25 12:31:34,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:31:34,222 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-25 12:31:34,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728629657] [2020-09-25 12:31:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 12:31:34,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-09-25 12:31:34,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 12:31:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:34,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:34,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728629657] [2020-09-25 12:31:34,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:31:34,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593199498] [2020-09-25 12:31:34,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:31:34,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:31:34,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:34,585 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-25 12:31:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,743 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-25 12:31:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:31:34,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-25 12:31:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,745 INFO L225 Difference]: With dead ends: 66 [2020-09-25 12:31:34,745 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 12:31:34,746 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 [2020-09-25 12:31:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 12:31:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 12:31:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 12:31:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-25 12:31:34,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-25 12:31:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,752 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-25 12:31:34,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:31:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-25 12:31:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 12:31:34,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,753 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] [2020-09-25 12:31:34,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:31:34,754 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-25 12:31:34,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408351401] [2020-09-25 12:31:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 12:31:35,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-25 12:31:35,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 12:31:35,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:35,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 12:31:35,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:35,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 12:31:35,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:35,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408351401] [2020-09-25 12:31:35,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:31:35,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762215479] [2020-09-25 12:31:35,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:31:35,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:31:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:35,180 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-25 12:31:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:35,364 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-25 12:31:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 12:31:35,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-25 12:31:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:35,366 INFO L225 Difference]: With dead ends: 72 [2020-09-25 12:31:35,366 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 12:31:35,367 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 [2020-09-25 12:31:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 12:31:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-25 12:31:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 12:31:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 12:31:35,376 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-25 12:31:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:35,377 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 12:31:35,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:31:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 12:31:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 12:31:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:35,380 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] [2020-09-25 12:31:35,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 12:31:35,380 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-25 12:31:35,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:35,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708069475] [2020-09-25 12:31:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 12:31:35,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-09-25 12:31:35,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 12:31:35,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:35,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 12:31:35,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:35,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:35,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708069475] [2020-09-25 12:31:35,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 12:31:35,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795993454] [2020-09-25 12:31:35,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 12:31:35,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 12:31:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:31:35,922 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-25 12:31:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:36,167 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-25 12:31:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 12:31:36,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-25 12:31:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:36,169 INFO L225 Difference]: With dead ends: 78 [2020-09-25 12:31:36,169 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 12:31:36,170 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 [2020-09-25 12:31:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 12:31:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 12:31:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 12:31:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 12:31:36,176 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-25 12:31:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:36,177 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 12:31:36,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 12:31:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 12:31:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 12:31:36,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:36,178 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] [2020-09-25 12:31:36,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 12:31:36,179 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-25 12:31:36,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:36,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480200582] [2020-09-25 12:31:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 12:31:36,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-09-25 12:31:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 12:31:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:36,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 12:31:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-09-25 12:31:36,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:36,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:36,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:36,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:36,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480200582] [2020-09-25 12:31:36,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:36,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 12:31:36,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112563265] [2020-09-25 12:31:36,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 12:31:36,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 12:31:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:31:36,874 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-25 12:31:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:37,232 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-25 12:31:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 12:31:37,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-25 12:31:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:37,234 INFO L225 Difference]: With dead ends: 84 [2020-09-25 12:31:37,234 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 12:31:37,235 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 [2020-09-25 12:31:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 12:31:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-25 12:31:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 12:31:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 12:31:37,247 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-25 12:31:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:37,248 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 12:31:37,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 12:31:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 12:31:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 12:31:37,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:37,250 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] [2020-09-25 12:31:37,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 12:31:37,250 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-25 12:31:37,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:37,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262308739] [2020-09-25 12:31:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 12:31:37,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-09-25 12:31:37,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:31:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 12:31:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 12:31:37,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:38,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:38,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:38,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:38,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:38,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:38,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:38,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:38,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:38,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:38,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:38,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262308739] [2020-09-25 12:31:38,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:38,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 12:31:38,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325283821] [2020-09-25 12:31:38,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 12:31:38,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 12:31:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:31:38,259 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-25 12:31:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:38,726 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-25 12:31:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 12:31:38,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-25 12:31:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:38,727 INFO L225 Difference]: With dead ends: 89 [2020-09-25 12:31:38,728 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 12:31:38,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 12:31:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 12:31:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-25 12:31:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 12:31:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 12:31:38,734 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-25 12:31:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:38,735 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 12:31:38,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 12:31:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 12:31:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 12:31:38,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:38,736 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] [2020-09-25 12:31:38,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 12:31:38,737 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-25 12:31:38,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:38,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371076063] [2020-09-25 12:31:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 12:31:38,754 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 12:31:38,755 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 12:31:38,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 12:31:38,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:31:38 BoogieIcfgContainer [2020-09-25 12:31:38,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:31:38,787 INFO L168 Benchmark]: Toolchain (without parser) took 10015.89 ms. Allocated memory was 140.0 MB in the beginning and 291.5 MB in the end (delta: 151.5 MB). Free memory was 103.3 MB in the beginning and 186.2 MB in the end (delta: -82.9 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,788 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 12:31:38,789 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.48 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,789 INFO L168 Benchmark]: Boogie Preprocessor took 150.29 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 93.0 MB in the beginning and 185.0 MB in the end (delta: -92.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,790 INFO L168 Benchmark]: RCFGBuilder took 331.09 ms. Allocated memory is still 205.0 MB. Free memory was 185.0 MB in the beginning and 172.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,791 INFO L168 Benchmark]: TraceAbstraction took 9201.21 ms. Allocated memory was 205.0 MB in the beginning and 291.5 MB in the end (delta: 86.5 MB). Free memory was 172.0 MB in the beginning and 186.2 MB in the end (delta: -14.2 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,794 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.48 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.29 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 93.0 MB in the beginning and 185.0 MB in the end (delta: -92.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.09 ms. Allocated memory is still 205.0 MB. Free memory was 185.0 MB in the beginning and 172.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9201.21 ms. Allocated memory was 205.0 MB in the beginning and 291.5 MB in the end (delta: 86.5 MB). Free memory was 172.0 MB in the beginning and 186.2 MB in the end (delta: -14.2 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] 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: 9.0s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 192 SDslu, 1453 SDs, 0 SdLazy, 865 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 262 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, 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, 12 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 448 ConstructedInterpolants, 0 QuantifiedInterpolants, 60454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 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...