/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:11:37,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:11:37,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:11:37,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:11:37,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:11:37,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:11:37,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:11:37,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:11:37,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:11:37,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:11:37,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:11:37,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:11:37,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:11:37,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:11:37,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:11:37,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:11:37,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:11:37,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:11:37,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:11:37,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:11:37,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:11:37,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:11:37,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:11:37,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:11:37,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:11:37,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:11:37,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:11:37,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:11:37,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:11:37,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:11:37,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:11:37,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:11:37,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:11:37,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:11:37,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:11:37,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:11:37,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:11:37,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:11:37,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:11:37,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:11:37,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:11:37,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 00:11:37,148 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:11:37,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:11:37,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:11:37,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:11:37,150 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:11:37,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:11:37,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:11:37,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:11:37,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:11:37,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:11:37,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:11:37,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:11:37,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:11:37,152 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:11:37,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:11:37,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:11:37,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:11:37,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:11:37,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:11:37,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:11:37,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:11:37,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:11:37,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:11:37,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:11:37,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:11:37,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:11:37,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:11:37,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:11:37,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:11:37,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:11:37,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:11:37,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:11:37,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:11:37,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:11:37,464 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:11:37,464 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-10-15 00:11:37,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0677205f/718830abd3d24710b28c2589bc5c2cfc/FLAG501f6d8aa [2020-10-15 00:11:37,959 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:11:37,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-10-15 00:11:37,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0677205f/718830abd3d24710b28c2589bc5c2cfc/FLAG501f6d8aa [2020-10-15 00:11:38,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0677205f/718830abd3d24710b28c2589bc5c2cfc [2020-10-15 00:11:38,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:11:38,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:11:38,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:11:38,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:11:38,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:11:38,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2fc715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38, skipping insertion in model container [2020-10-15 00:11:38,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:11:38,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:11:38,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:11:38,551 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:11:38,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:11:38,581 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:11:38,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38 WrapperNode [2020-10-15 00:11:38,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:11:38,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:11:38,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:11:38,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:11:38,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... [2020-10-15 00:11:38,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:11:38,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:11:38,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:11:38,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:11:38,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:11:38,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:11:38,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:11:38,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:11:38,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:11:38,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:11:38,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:11:38,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-15 00:11:38,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:11:38,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:11:38,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:11:38,926 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:11:38,926 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:11:38,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:11:38 BoogieIcfgContainer [2020-10-15 00:11:38,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:11:38,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:11:38,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:11:38,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:11:38,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:11:38" (1/3) ... [2020-10-15 00:11:38,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e9429f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:11:38, skipping insertion in model container [2020-10-15 00:11:38,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:38" (2/3) ... [2020-10-15 00:11:38,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e9429f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:11:38, skipping insertion in model container [2020-10-15 00:11:38,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:11:38" (3/3) ... [2020-10-15 00:11:38,938 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-10-15 00:11:38,949 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:11:38,956 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:11:38,971 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:11:38,997 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:11:38,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:11:38,997 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:11:38,997 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:11:38,998 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:11:38,998 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:11:38,998 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:11:38,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:11:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-15 00:11:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:11:39,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:39,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:39,037 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:39,046 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-15 00:11:39,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:39,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604018274] [2020-10-15 00:11:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:39,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:39,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:39,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:11:39,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:11:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-15 00:11:39,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:39,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:39,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:39,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:39,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:11:39,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:11:39,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:39,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:39,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:39,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:39,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:39,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:39,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:39,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:39,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:39,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604018274] [2020-10-15 00:11:39,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:11:39,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:11:39,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726805134] [2020-10-15 00:11:39,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:39,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:39,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:39,495 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-15 00:11:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:39,581 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-15 00:11:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:39,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-15 00:11:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:39,592 INFO L225 Difference]: With dead ends: 40 [2020-10-15 00:11:39,592 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:11:39,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:11:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-15 00:11:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 00:11:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-15 00:11:39,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-15 00:11:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:39,629 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-15 00:11:39,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-15 00:11:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:11:39,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:39,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:39,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:11:39,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-10-15 00:11:39,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:39,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870285434] [2020-10-15 00:11:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:39,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:39,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:11:39,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:39,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-15 00:11:39,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:39,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:39,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:11:39,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:11:39,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:11:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:40,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:40,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:40,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:40,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:40,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:40,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:40,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:40,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:40,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870285434] [2020-10-15 00:11:40,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:40,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:11:40,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492744576] [2020-10-15 00:11:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:11:40,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:11:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:11:40,116 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-10-15 00:11:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:40,273 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-10-15 00:11:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:11:40,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 00:11:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:40,276 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:11:40,276 INFO L226 Difference]: Without dead ends: 21 [2020-10-15 00:11:40,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:11:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-15 00:11:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-10-15 00:11:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 00:11:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-15 00:11:40,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-10-15 00:11:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:40,285 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-15 00:11:40,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:11:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-15 00:11:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:11:40,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:40,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:40,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:11:40,287 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-10-15 00:11:40,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:40,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376265973] [2020-10-15 00:11:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:40,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:11:40,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:40,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-15 00:11:40,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:40,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:11:40,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:40,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:11:40,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:40,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:40,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:40,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:40,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:40,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:40,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:40,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:40,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:11:40,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376265973] [2020-10-15 00:11:40,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:40,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:11:40,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579009295] [2020-10-15 00:11:40,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:11:40,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:11:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:40,663 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 10 states. [2020-10-15 00:11:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:40,806 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-15 00:11:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:11:40,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-15 00:11:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:40,807 INFO L225 Difference]: With dead ends: 31 [2020-10-15 00:11:40,807 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 00:11:40,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:11:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 00:11:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-15 00:11:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:11:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-15 00:11:40,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-15 00:11:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:40,815 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-15 00:11:40,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:11:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-15 00:11:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:11:40,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:40,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:40,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:11:40,817 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:40,818 INFO L82 PathProgramCache]: Analyzing trace with hash -817913263, now seen corresponding path program 1 times [2020-10-15 00:11:40,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:40,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258881837] [2020-10-15 00:11:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:40,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:40,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:11:40,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:11:40,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-15 00:11:40,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:40,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:11:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:40,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:11:40,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:40,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:40,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:40,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:40,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:40,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:40,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:11:41,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258881837] [2020-10-15 00:11:41,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:41,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:11:41,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794426749] [2020-10-15 00:11:41,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:11:41,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:41,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:11:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:11:41,003 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-15 00:11:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:41,031 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-15 00:11:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:11:41,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-15 00:11:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:41,036 INFO L225 Difference]: With dead ends: 33 [2020-10-15 00:11:41,036 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:11:41,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:11:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:11:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-15 00:11:41,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:11:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-15 00:11:41,046 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2020-10-15 00:11:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:41,047 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-15 00:11:41,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:11:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-15 00:11:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:11:41,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:41,049 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:41,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:11:41,049 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 2 times [2020-10-15 00:11:41,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:41,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426028390] [2020-10-15 00:11:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:11:41,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-15 00:11:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:11:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:41,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:41,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:41,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:41,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426028390] [2020-10-15 00:11:41,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:41,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:11:41,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245167432] [2020-10-15 00:11:41,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:41,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:41,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:41,204 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-15 00:11:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:41,242 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-15 00:11:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:41,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-15 00:11:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:41,245 INFO L225 Difference]: With dead ends: 33 [2020-10-15 00:11:41,245 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:11:41,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:11:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-15 00:11:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:11:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-15 00:11:41,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-10-15 00:11:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:41,259 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-15 00:11:41,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-15 00:11:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:11:41,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:41,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:41,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:11:41,264 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 3 times [2020-10-15 00:11:41,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:41,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565506374] [2020-10-15 00:11:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:11:41,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-15 00:11:41,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:11:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:11:41,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:41,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:41,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:41,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:41,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:41,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:41,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:41,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565506374] [2020-10-15 00:11:41,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:41,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:11:41,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052732146] [2020-10-15 00:11:41,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:11:41,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:11:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:41,411 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-15 00:11:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:41,450 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-15 00:11:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:11:41,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-15 00:11:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:41,451 INFO L225 Difference]: With dead ends: 36 [2020-10-15 00:11:41,452 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 00:11:41,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 00:11:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-15 00:11:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 00:11:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-15 00:11:41,464 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-15 00:11:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:41,465 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-15 00:11:41,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:11:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-15 00:11:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:11:41,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:41,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:41,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:11:41,467 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 4 times [2020-10-15 00:11:41,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:41,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790245220] [2020-10-15 00:11:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:11:41,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-15 00:11:41,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:11:41,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:41,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:11:41,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:41,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:41,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:41,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:41,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:41,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:41,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790245220] [2020-10-15 00:11:41,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:41,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:11:41,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635547166] [2020-10-15 00:11:41,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:11:41,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:11:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:11:41,640 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-15 00:11:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:41,680 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-15 00:11:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:11:41,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-15 00:11:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:41,682 INFO L225 Difference]: With dead ends: 39 [2020-10-15 00:11:41,683 INFO L226 Difference]: Without dead ends: 31 [2020-10-15 00:11:41,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:11:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-15 00:11:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-15 00:11:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 00:11:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-15 00:11:41,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-15 00:11:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:41,694 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-15 00:11:41,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:11:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-15 00:11:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:11:41,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:41,696 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:41,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:11:41,698 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:41,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 5 times [2020-10-15 00:11:41,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:41,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705253266] [2020-10-15 00:11:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:11:41,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-15 00:11:41,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:11:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:41,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:11:41,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:41,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:41,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:41,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:41,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:41,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:41,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:41,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:11:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:41,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705253266] [2020-10-15 00:11:41,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:41,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:11:41,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329193650] [2020-10-15 00:11:41,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:11:41,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:11:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:11:41,866 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-15 00:11:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:41,919 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-15 00:11:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:11:41,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-15 00:11:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:41,920 INFO L225 Difference]: With dead ends: 42 [2020-10-15 00:11:41,921 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:11:41,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:11:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:11:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-15 00:11:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 00:11:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-15 00:11:41,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-15 00:11:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:41,934 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-15 00:11:41,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:11:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-15 00:11:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:11:41,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:41,936 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:41,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:11:41,939 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:41,939 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 6 times [2020-10-15 00:11:41,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:41,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180163542] [2020-10-15 00:11:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:42,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:11:42,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:42,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-15 00:11:42,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:42,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:11:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:11:42,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:42,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:42,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:42,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:42,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:42,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:42,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:42,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:42,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180163542] [2020-10-15 00:11:42,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:42,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:11:42,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546306546] [2020-10-15 00:11:42,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:11:42,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:42,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:11:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:11:42,143 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-10-15 00:11:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:42,199 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-15 00:11:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:11:42,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-15 00:11:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:42,202 INFO L225 Difference]: With dead ends: 45 [2020-10-15 00:11:42,202 INFO L226 Difference]: Without dead ends: 37 [2020-10-15 00:11:42,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:11:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-15 00:11:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-15 00:11:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:11:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-15 00:11:42,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-15 00:11:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:42,208 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-15 00:11:42,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:11:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-15 00:11:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:11:42,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:42,210 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:42,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:11:42,210 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 7 times [2020-10-15 00:11:42,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:42,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824683565] [2020-10-15 00:11:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:42,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:11:42,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-15 00:11:42,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:42,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:11:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:11:42,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:42,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:42,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:42,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:42,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:42,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:42,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:42,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824683565] [2020-10-15 00:11:42,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:42,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:11:42,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221660034] [2020-10-15 00:11:42,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:11:42,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:11:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:42,408 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-10-15 00:11:42,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:42,452 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-15 00:11:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:11:42,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-15 00:11:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:42,454 INFO L225 Difference]: With dead ends: 48 [2020-10-15 00:11:42,454 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 00:11:42,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 00:11:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-15 00:11:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 00:11:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-15 00:11:42,460 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-15 00:11:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:42,460 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-15 00:11:42,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:11:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-15 00:11:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:11:42,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:42,462 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:42,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:11:42,462 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 8 times [2020-10-15 00:11:42,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:42,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898149831] [2020-10-15 00:11:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:42,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:11:42,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:42,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-15 00:11:42,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:42,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:42,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:11:42,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:42,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:11:42,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:42,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:42,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:42,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:42,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:42,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:42,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:42,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898149831] [2020-10-15 00:11:42,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:42,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:11:42,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506569958] [2020-10-15 00:11:42,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:11:42,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:42,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:11:42,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:11:42,698 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-10-15 00:11:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:42,754 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-15 00:11:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:11:42,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-15 00:11:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:42,755 INFO L225 Difference]: With dead ends: 51 [2020-10-15 00:11:42,755 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 00:11:42,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:11:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 00:11:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-15 00:11:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 00:11:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-15 00:11:42,763 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-10-15 00:11:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:42,765 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-15 00:11:42,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:11:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-15 00:11:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:11:42,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:42,769 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:42,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:11:42,769 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 9 times [2020-10-15 00:11:42,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:42,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155919763] [2020-10-15 00:11:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 00:11:42,785 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 00:11:42,785 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 00:11:42,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:11:42,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:11:42 BoogieIcfgContainer [2020-10-15 00:11:42,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 00:11:42,810 INFO L168 Benchmark]: Toolchain (without parser) took 4493.54 ms. Allocated memory was 147.3 MB in the beginning and 274.7 MB in the end (delta: 127.4 MB). Free memory was 103.8 MB in the beginning and 228.0 MB in the end (delta: -124.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:42,810 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-15 00:11:42,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.75 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 94.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:42,812 INFO L168 Benchmark]: Boogie Preprocessor took 107.64 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 94.1 MB in the beginning and 181.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:42,813 INFO L168 Benchmark]: RCFGBuilder took 240.10 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 169.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:42,813 INFO L168 Benchmark]: TraceAbstraction took 3876.33 ms. Allocated memory was 203.4 MB in the beginning and 274.7 MB in the end (delta: 71.3 MB). Free memory was 169.9 MB in the beginning and 228.0 MB in the end (delta: -58.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:11:42,816 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.75 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 94.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.64 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 94.1 MB in the beginning and 181.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.10 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 169.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3876.33 ms. Allocated memory was 203.4 MB in the beginning and 274.7 MB in the end (delta: 71.3 MB). Free memory was 169.9 MB in the beginning and 228.0 MB in the end (delta: -58.2 MB). Peak memory consumption was 13.1 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, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 67 SDslu, 386 SDs, 0 SdLazy, 373 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=11, 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, 11 MinimizatonAttempts, 13 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 243 ConstructedInterpolants, 0 QuantifiedInterpolants, 16329 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 88/417 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...