/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/float-benchs/drift_tenth.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:14:05,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:14:05,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:14:05,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:14:05,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:14:05,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:14:05,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:14:05,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:14:05,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:14:05,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:14:05,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:14:05,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:14:05,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:14:05,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:14:05,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:14:05,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:14:05,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:14:05,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:14:05,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:14:05,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:14:05,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:14:05,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:14:05,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:14:05,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:14:05,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:14:05,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:14:05,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:14:05,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:14:05,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:14:05,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:14:05,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:14:05,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:14:05,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:14:05,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:14:05,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:14:05,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:14:05,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:14:05,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:14:05,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:14:05,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:14:05,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:14:05,813 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 [2020-10-14 23:14:05,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:14:05,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:14:05,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:14:05,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:14:05,861 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:14:05,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:14:05,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:14:05,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:14:05,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:14:05,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:14:05,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:14:05,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:14:05,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:14:05,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:14:05,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:14:05,864 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:14:05,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:14:05,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:14:05,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:14:05,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:14:05,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:14:05,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:14:05,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:14:05,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:14:05,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:14:05,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:14:05,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:14:05,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:14:05,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:14:05,867 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; [2020-10-14 23:14:06,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:14:06,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:14:06,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:14:06,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:14:06,219 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:14:06,220 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c [2020-10-14 23:14:06,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b025a900/c3078c2ca4ef4627a9e685b81b645cd7/FLAGef0716e20 [2020-10-14 23:14:06,761 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:14:06,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c [2020-10-14 23:14:06,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b025a900/c3078c2ca4ef4627a9e685b81b645cd7/FLAGef0716e20 [2020-10-14 23:14:07,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b025a900/c3078c2ca4ef4627a9e685b81b645cd7 [2020-10-14 23:14:07,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:14:07,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:14:07,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:14:07,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:14:07,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:14:07,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47731edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07, skipping insertion in model container [2020-10-14 23:14:07,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:14:07,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:14:07,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:14:07,359 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:14:07,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:14:07,387 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:14:07,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07 WrapperNode [2020-10-14 23:14:07,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:14:07,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:14:07,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:14:07,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:14:07,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (1/1) ... [2020-10-14 23:14:07,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:14:07,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:14:07,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:14:07,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:14:07,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (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 [2020-10-14 23:14:07,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:14:07,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:14:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:14:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:14:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:14:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:14:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:14:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:14:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:14:07,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:14:07,764 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:14:07,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:07 BoogieIcfgContainer [2020-10-14 23:14:07,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:14:07,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:14:07,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:14:07,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:14:07,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:14:07" (1/3) ... [2020-10-14 23:14:07,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db43810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:07, skipping insertion in model container [2020-10-14 23:14:07,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:07" (2/3) ... [2020-10-14 23:14:07,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db43810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:07, skipping insertion in model container [2020-10-14 23:14:07,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:07" (3/3) ... [2020-10-14 23:14:07,776 INFO L109 eAbstractionObserver]: Analyzing ICFG drift_tenth.c [2020-10-14 23:14:07,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:14:07,794 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:14:07,810 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:14:07,832 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:14:07,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:14:07,832 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:14:07,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:14:07,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:14:07,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:14:07,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:14:07,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:14:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-14 23:14:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:14:07,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:07,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:07,860 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:07,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2020-10-14 23:14:07,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:07,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135538673] [2020-10-14 23:14:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:07,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:14:08,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-14 23:14:08,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:08,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:14:08,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:08,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:14:08,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:08,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:14:08,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:08,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:14:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:08,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135538673] [2020-10-14 23:14:08,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:14:08,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 23:14:08,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873599151] [2020-10-14 23:14:08,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 23:14:08,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 23:14:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 23:14:08,080 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-14 23:14:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:08,103 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-14 23:14:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 23:14:08,105 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 23:14:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:08,113 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:14:08,114 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 23:14:08,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 23:14:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 23:14:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 23:14:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 23:14:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-14 23:14:08,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-14 23:14:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:08,156 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-14 23:14:08,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 23:14:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-14 23:14:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:14:08,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:08,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:08,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:14:08,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:08,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1877050693, now seen corresponding path program 1 times [2020-10-14 23:14:08,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:08,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125518375] [2020-10-14 23:14:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:14:08,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 23:14:08,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:14:08,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:08,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:14:08,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:08,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:08,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 23:14:08,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:08,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:08,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:14:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:08,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125518375] [2020-10-14 23:14:08,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:14:08,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:14:08,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133672706] [2020-10-14 23:14:08,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:14:08,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:08,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:14:08,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:14:08,296 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-10-14 23:14:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:08,324 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-14 23:14:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:14:08,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 23:14:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:08,326 INFO L225 Difference]: With dead ends: 19 [2020-10-14 23:14:08,326 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:14:08,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:14:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:14:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-14 23:14:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 23:14:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 23:14:08,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-14 23:14:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:08,336 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 23:14:08,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:14:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 23:14:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:14:08,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:08,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:08,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:14:08,338 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:08,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1175909113, now seen corresponding path program 1 times [2020-10-14 23:14:08,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:08,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986113081] [2020-10-14 23:14:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:14:08,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-14 23:14:08,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:14:08,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:14:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:14:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:08,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:14:08,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:08,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:08,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:08,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:08,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986113081] [2020-10-14 23:14:08,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:08,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:14:08,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162842174] [2020-10-14 23:14:08,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:14:08,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:14:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:14:08,509 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-14 23:14:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:08,537 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-14 23:14:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:14:08,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 23:14:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:08,539 INFO L225 Difference]: With dead ends: 21 [2020-10-14 23:14:08,539 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:14:08,540 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 [2020-10-14 23:14:08,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:14:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 23:14:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:14:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 23:14:08,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-14 23:14:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:08,545 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 23:14:08,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:14:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 23:14:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:14:08,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:08,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:08,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:14:08,547 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1607619511, now seen corresponding path program 2 times [2020-10-14 23:14:08,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:08,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12413748] [2020-10-14 23:14:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:14:08,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-14 23:14:08,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:14:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:14:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:08,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:08,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:14:08,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:08,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:08,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:08,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12413748] [2020-10-14 23:14:08,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:08,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:14:08,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471099831] [2020-10-14 23:14:08,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:14:08,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:14:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:14:08,698 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-14 23:14:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:08,724 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-14 23:14:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:14:08,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 23:14:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:08,725 INFO L225 Difference]: With dead ends: 23 [2020-10-14 23:14:08,726 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:14:08,726 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 [2020-10-14 23:14:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:14:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 23:14:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:14:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 23:14:08,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-14 23:14:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:08,732 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 23:14:08,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:14:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 23:14:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:14:08,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:08,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:08,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:14:08,733 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash -130515723, now seen corresponding path program 3 times [2020-10-14 23:14:08,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:08,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243648343] [2020-10-14 23:14:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:14:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:08,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:14:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:14:08,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:08,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:08,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:08,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:08,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:14:08,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:08,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:08,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243648343] [2020-10-14 23:14:08,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:08,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:14:08,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243900366] [2020-10-14 23:14:08,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:14:08,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:14:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:14:08,897 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-14 23:14:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:08,925 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-14 23:14:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:14:08,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 23:14:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:08,927 INFO L225 Difference]: With dead ends: 25 [2020-10-14 23:14:08,927 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:14:08,928 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 [2020-10-14 23:14:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:14:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 23:14:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:14:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 23:14:08,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-14 23:14:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:08,934 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 23:14:08,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:14:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 23:14:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:14:08,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:08,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:08,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:14:08,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 263802547, now seen corresponding path program 4 times [2020-10-14 23:14:08,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:08,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589957484] [2020-10-14 23:14:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:08,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:14:09,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-14 23:14:09,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:14:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:14:09,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:09,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 23:14:09,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:09,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:09,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:09,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:09,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589957484] [2020-10-14 23:14:09,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:09,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:14:09,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989168431] [2020-10-14 23:14:09,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:14:09,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:09,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:14:09,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:14:09,098 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-14 23:14:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:09,132 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-14 23:14:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:14:09,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:14:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:09,134 INFO L225 Difference]: With dead ends: 27 [2020-10-14 23:14:09,134 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:14:09,135 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 [2020-10-14 23:14:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:14:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 23:14:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:14:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 23:14:09,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-14 23:14:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:09,140 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 23:14:09,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:14:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 23:14:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:14:09,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:09,141 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:09,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:14:09,142 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1246537969, now seen corresponding path program 5 times [2020-10-14 23:14:09,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:09,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038344551] [2020-10-14 23:14:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:14:09,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 23:14:09,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:14:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:14:09,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:09,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:14:09,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:09,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:09,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:09,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:09,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038344551] [2020-10-14 23:14:09,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:09,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:14:09,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894795555] [2020-10-14 23:14:09,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:14:09,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:14:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:14:09,270 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-14 23:14:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:09,304 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-14 23:14:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:14:09,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:14:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:09,306 INFO L225 Difference]: With dead ends: 29 [2020-10-14 23:14:09,306 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:14:09,306 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 [2020-10-14 23:14:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:14:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 23:14:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:14:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 23:14:09,312 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-14 23:14:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:09,312 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 23:14:09,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:14:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 23:14:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:14:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:09,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:09,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:14:09,314 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash 762473391, now seen corresponding path program 6 times [2020-10-14 23:14:09,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:09,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605931248] [2020-10-14 23:14:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:14:09,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 23:14:09,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:14:09,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:09,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:14:09,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:09,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:14:09,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:09,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:09,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:09,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:09,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605931248] [2020-10-14 23:14:09,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:09,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:14:09,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129089929] [2020-10-14 23:14:09,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:14:09,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:14:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:14:09,446 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-14 23:14:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:09,478 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-14 23:14:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:14:09,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 23:14:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:09,480 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:14:09,480 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:14:09,480 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 [2020-10-14 23:14:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:14:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 23:14:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:14:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 23:14:09,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-14 23:14:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:09,486 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 23:14:09,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:14:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 23:14:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:14:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:09,487 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:09,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:14:09,488 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash -567118099, now seen corresponding path program 7 times [2020-10-14 23:14:09,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:09,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831705498] [2020-10-14 23:14:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:14:09,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-14 23:14:09,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:14:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:14:09,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:14:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:14:09,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:09,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:09,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831705498] [2020-10-14 23:14:09,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:09,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:14:09,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695454749] [2020-10-14 23:14:09,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:14:09,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:14:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:14:09,637 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-14 23:14:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:09,674 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-14 23:14:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:14:09,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:14:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:09,676 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:14:09,676 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:14:09,677 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 [2020-10-14 23:14:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:14:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 23:14:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:14:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 23:14:09,682 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-14 23:14:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:09,682 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 23:14:09,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:14:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 23:14:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:14:09,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:09,684 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:09,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:14:09,684 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1595714219, now seen corresponding path program 8 times [2020-10-14 23:14:09,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:09,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51236735] [2020-10-14 23:14:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:14:09,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 23:14:09,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:14:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:14:09,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:09,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:09,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:09,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:09,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:14:09,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:09,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:09,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:09,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:09,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:09,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:09,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51236735] [2020-10-14 23:14:09,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:09,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:14:09,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861709146] [2020-10-14 23:14:09,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:14:09,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:09,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:14:09,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:14:09,855 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-14 23:14:09,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:09,902 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-14 23:14:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:14:09,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-14 23:14:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:09,904 INFO L225 Difference]: With dead ends: 35 [2020-10-14 23:14:09,904 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:14:09,905 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 [2020-10-14 23:14:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:14:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 23:14:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:14:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-14 23:14:09,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-14 23:14:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:09,911 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-14 23:14:09,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:14:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-14 23:14:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:14:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:09,912 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:09,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:14:09,913 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:09,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1313400553, now seen corresponding path program 9 times [2020-10-14 23:14:09,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:09,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161889497] [2020-10-14 23:14:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:10,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:10,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:14:10,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:10,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-14 23:14:10,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:10,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:14:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:14:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:14:10,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:14:10,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:14:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:14:10,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:14:10,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:14:10,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:14:10,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:14:10,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:14:10,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:14:10,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:14:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:14:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:14:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:14:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:14:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:14:10,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161889497] [2020-10-14 23:14:10,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:14:10,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:14:10,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172253438] [2020-10-14 23:14:10,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:14:10,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:14:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:14:10,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:14:10,112 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-14 23:14:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:14:10,156 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-14 23:14:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:14:10,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 23:14:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:14:10,157 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:14:10,158 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:14:10,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:14:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:14:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 23:14:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:14:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-14 23:14:10,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-14 23:14:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:14:10,163 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-14 23:14:10,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:14:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-14 23:14:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:14:10,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:14:10,165 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:14:10,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:14:10,165 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:14:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:14:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 592907175, now seen corresponding path program 10 times [2020-10-14 23:14:10,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:14:10,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511933826] [2020-10-14 23:14:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:14:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:14:10,175 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:14:10,175 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:14:10,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:14:10,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:14:10 BoogieIcfgContainer [2020-10-14 23:14:10,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:14:10,199 INFO L168 Benchmark]: Toolchain (without parser) took 3043.77 ms. Allocated memory was 144.7 MB in the beginning and 246.9 MB in the end (delta: 102.2 MB). Free memory was 101.3 MB in the beginning and 187.1 MB in the end (delta: -85.7 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-10-14 23:14:10,199 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 119.3 MB in the beginning and 118.9 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 23:14:10,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.77 ms. Allocated memory is still 144.7 MB. Free memory was 100.9 MB in the beginning and 91.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-14 23:14:10,201 INFO L168 Benchmark]: Boogie Preprocessor took 129.30 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 91.2 MB in the beginning and 179.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:14:10,202 INFO L168 Benchmark]: RCFGBuilder took 249.47 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:14:10,203 INFO L168 Benchmark]: TraceAbstraction took 2427.31 ms. Allocated memory was 200.8 MB in the beginning and 246.9 MB in the end (delta: 46.1 MB). Free memory was 167.6 MB in the beginning and 187.1 MB in the end (delta: -19.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-10-14 23:14:10,206 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 119.3 MB in the beginning and 118.9 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.77 ms. Allocated memory is still 144.7 MB. Free memory was 100.9 MB in the beginning and 91.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.30 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 91.2 MB in the beginning and 179.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.47 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2427.31 ms. Allocated memory was 200.8 MB in the beginning and 246.9 MB in the end (delta: 46.1 MB). Free memory was 167.6 MB in the beginning and 187.1 MB in the end (delta: -19.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 13. Possible FailurePath: [L8] float tick = 1.f / 10.f; [L9] float time = 0.f; [L10] int i; [L12] i = 0 [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND TRUE i < 10 [L13] time += tick [L12] i++ [L12] COND FALSE !(i < 10) [L15] CALL __VERIFIER_assert(time != 1.0) [L4] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 55 SDslu, 360 SDs, 0 SdLazy, 174 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 7911 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 0/285 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...