/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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:56:07,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:56:07,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:56:07,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:56:07,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:56:07,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:56:07,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:56:07,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:56:07,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:56:07,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:56:07,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:56:07,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:56:07,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:56:07,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:56:07,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:56:07,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:56:07,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:56:07,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:56:07,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:56:07,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:56:07,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:56:07,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:56:07,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:56:07,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:56:07,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:56:07,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:56:07,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:56:07,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:56:07,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:56:07,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:56:07,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:56:07,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:56:07,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:56:07,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:56:07,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:56:07,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:56:07,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:56:07,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:56:07,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:56:07,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:56:07,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:56:07,215 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 23:56:07,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:56:07,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:56:07,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:56:07,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:56:07,262 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:56:07,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:56:07,263 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:56:07,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:56:07,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:56:07,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:56:07,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:56:07,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:56:07,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:56:07,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:56:07,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:56:07,265 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:56:07,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:56:07,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:56:07,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:56:07,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:56:07,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:56:07,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:56:07,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:56:07,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:56:07,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:56:07,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:56:07,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:56:07,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:56:07,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:56:07,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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 23:56:07,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:56:07,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:56:07,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:56:07,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:56:07,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:56:07,594 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-10-14 23:56:07,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b9bd7c0/fbdb65c33f504366b13fa897d7ca2841/FLAG487df2336 [2020-10-14 23:56:08,063 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:56:08,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/half.i [2020-10-14 23:56:08,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b9bd7c0/fbdb65c33f504366b13fa897d7ca2841/FLAG487df2336 [2020-10-14 23:56:08,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b9bd7c0/fbdb65c33f504366b13fa897d7ca2841 [2020-10-14 23:56:08,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:56:08,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:56:08,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:56:08,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:56:08,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:56:08,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d644e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08, skipping insertion in model container [2020-10-14 23:56:08,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:56:08,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:56:08,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:56:08,684 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:56:08,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:56:08,715 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:56:08,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08 WrapperNode [2020-10-14 23:56:08,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:56:08,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:56:08,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:56:08,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:56:08,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (1/1) ... [2020-10-14 23:56:08,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:56:08,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:56:08,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:56:08,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:56:08,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (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 23:56:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:56:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:56:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 23:56:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:56:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:56:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 23:56:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:56:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:56:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:56:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:56:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:56:09,075 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:56:09,075 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:56:09,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:09 BoogieIcfgContainer [2020-10-14 23:56:09,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:56:09,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:56:09,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:56:09,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:56:09,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:08" (1/3) ... [2020-10-14 23:56:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d404a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:09, skipping insertion in model container [2020-10-14 23:56:09,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:08" (2/3) ... [2020-10-14 23:56:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d404a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:09, skipping insertion in model container [2020-10-14 23:56:09,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:09" (3/3) ... [2020-10-14 23:56:09,089 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-10-14 23:56:09,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:56:09,104 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:56:09,117 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:56:09,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:56:09,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:56:09,137 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:56:09,137 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:56:09,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:56:09,138 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:56:09,138 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:56:09,138 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:56:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 23:56:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 23:56:09,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:09,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:09,160 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-10-14 23:56:09,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:09,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517907074] [2020-10-14 23:56:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:09,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:09,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:56:09,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:09,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 23:56:09,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:09,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:56:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:09,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:56:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:09,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:09,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:09,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:56:09,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:09,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:09,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:09,359 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 23:56:09,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517907074] [2020-10-14 23:56:09,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:56:09,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 23:56:09,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332052755] [2020-10-14 23:56:09,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 23:56:09,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:09,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 23:56:09,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 23:56:09,394 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-10-14 23:56:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:09,431 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 23:56:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 23:56:09,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-14 23:56:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:09,446 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:56:09,446 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:56:09,451 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 23:56:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:56:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:56:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:56:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 23:56:09,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-14 23:56:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:09,501 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 23:56:09,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 23:56:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 23:56:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 23:56:09,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:09,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:09,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:56:09,505 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-10-14 23:56:09,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:09,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539282129] [2020-10-14 23:56:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:09,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:09,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:09,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:56:09,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:09,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-14 23:56:09,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:09,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:09,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:56:09,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:09,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:09,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:09,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:09,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:09,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:09,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:56:09,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:09,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:56:09,827 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 23:56:09,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539282129] [2020-10-14 23:56:09,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:56:09,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:56:09,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429131070] [2020-10-14 23:56:09,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:56:09,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:56:09,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:09,835 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-10-14 23:56:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:10,026 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-14 23:56:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:56:10,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-14 23:56:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:10,030 INFO L225 Difference]: With dead ends: 26 [2020-10-14 23:56:10,030 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 23:56:10,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 23:56:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-10-14 23:56:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:56:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 23:56:10,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-10-14 23:56:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:10,039 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 23:56:10,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:56:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 23:56:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:56:10,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:10,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:10,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:56:10,041 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-10-14 23:56:10,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:10,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066863868] [2020-10-14 23:56:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:10,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:10,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:56:10,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:56:10,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:10,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:56:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:56:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:56:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:56:10,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:10,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:10,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:10,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:10,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:10,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:10,321 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 23:56:10,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066863868] [2020-10-14 23:56:10,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:10,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:56:10,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991959633] [2020-10-14 23:56:10,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:56:10,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:56:10,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:56:10,324 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-10-14 23:56:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:10,371 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-14 23:56:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:56:10,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 23:56:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:10,373 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:56:10,373 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:56:10,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:56:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-14 23:56:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 23:56:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-14 23:56:10,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-10-14 23:56:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:10,380 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-14 23:56:10,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:56:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-14 23:56:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:10,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:10,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:10,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:56:10,382 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1620020812, now seen corresponding path program 2 times [2020-10-14 23:56:10,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:10,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715675154] [2020-10-14 23:56:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:10,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:10,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:10,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-14 23:56:10,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:10,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:56:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:56:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:56:10,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:10,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:10,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:10,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:10,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:10,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:10,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:10,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:10,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:10,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:10,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715675154] [2020-10-14 23:56:10,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:10,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:56:10,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278879554] [2020-10-14 23:56:10,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:56:10,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:56:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:56:10,721 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-10-14 23:56:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:10,748 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-14 23:56:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:56:10,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 23:56:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:10,749 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:56:10,750 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:56:10,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:56:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:56:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 23:56:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:56:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 23:56:10,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-10-14 23:56:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:10,756 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 23:56:10,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:56:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 23:56:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:10,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:10,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:10,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:56:10,757 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-10-14 23:56:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74326488] [2020-10-14 23:56:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:10,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:10,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:10,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 23:56:10,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:10,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:56:10,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:11,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:11,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:11,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:11,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:11,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:11,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:11,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:11,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:11,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:11,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74326488] [2020-10-14 23:56:11,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:11,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:11,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244789538] [2020-10-14 23:56:11,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:11,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:11,232 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-10-14 23:56:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:11,454 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-14 23:56:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:56:11,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-14 23:56:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:11,455 INFO L225 Difference]: With dead ends: 27 [2020-10-14 23:56:11,455 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:56:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:56:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:56:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 23:56:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:56:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 23:56:11,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-14 23:56:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:11,467 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 23:56:11,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 23:56:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:56:11,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:11,469 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:11,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:56:11,470 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1782214080, now seen corresponding path program 2 times [2020-10-14 23:56:11,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:11,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229985825] [2020-10-14 23:56:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:11,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:11,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:11,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:11,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:11,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:56:11,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:56:11,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-14 23:56:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:11,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:56:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:56:11,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:11,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:11,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:11,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:11,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:11,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:11,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:11,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:11,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:11,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:11,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229985825] [2020-10-14 23:56:11,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:11,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:56:11,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758899805] [2020-10-14 23:56:11,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:56:11,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:56:11,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:11,925 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-14 23:56:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:12,010 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-10-14 23:56:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:56:12,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:56:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:12,011 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:56:12,012 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:56:12,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:56:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-14 23:56:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:56:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-14 23:56:12,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2020-10-14 23:56:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:12,018 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-14 23:56:12,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:56:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-14 23:56:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:56:12,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:12,019 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:12,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:56:12,019 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1298269576, now seen corresponding path program 3 times [2020-10-14 23:56:12,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:12,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467908899] [2020-10-14 23:56:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:12,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:12,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:56:12,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-14 23:56:12,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:12,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:56:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:56:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:12,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:12,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:12,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:12,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:12,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:12,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:12,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:12,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:12,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:12,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:12,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:56:12,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467908899] [2020-10-14 23:56:12,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:12,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:12,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944224141] [2020-10-14 23:56:12,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:12,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:12,465 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2020-10-14 23:56:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:12,647 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 23:56:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:56:12,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-14 23:56:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:12,648 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:56:12,648 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 23:56:12,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:56:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 23:56:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 23:56:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 23:56:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 23:56:12,650 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-14 23:56:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:12,650 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 23:56:12,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 23:56:12,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 23:56:12,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:56:12,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 23:56:12,763 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 23:56:12,763 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 23:56:12,763 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 23:56:12,764 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 23:56:12,764 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 23:56:12,764 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 23:56:12,764 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-14 23:56:12,764 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-14 23:56:12,764 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-14 23:56:12,764 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-14 23:56:12,764 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-10-14 23:56:12,765 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 25) no Hoare annotation was computed. [2020-10-14 23:56:12,765 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-10-14 23:56:12,765 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-10-14 23:56:12,765 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-14 23:56:12,765 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 22) no Hoare annotation was computed. [2020-10-14 23:56:12,765 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 22) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0))) (let ((.cse0 (<= main_~i~0 .cse1))) (or (and (<= main_~n~0 0) (<= 0 main_~i~0) .cse0) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse1 .cse2) (<= .cse2 .cse1) (<= .cse2 (* 2 main_~k~0)))) (and (<= .cse1 main_~i~0) .cse0 (< main_~n~0 (+ main_~k~0 1)))))) [2020-10-14 23:56:12,766 INFO L264 CegarLoopResult]: At program point L18-4(lines 18 22) the Hoare annotation is: (or (= main_~n~0 main_~k~0) (< main_~k~0 0)) [2020-10-14 23:56:12,766 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 25) no Hoare annotation was computed. [2020-10-14 23:56:12,766 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-14 23:56:12,766 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-14 23:56:12,766 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-14 23:56:12,766 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-14 23:56:12,766 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-14 23:56:12,767 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-14 23:56:12,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:56:12 BoogieIcfgContainer [2020-10-14 23:56:12,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:56:12,788 INFO L168 Benchmark]: Toolchain (without parser) took 4304.23 ms. Allocated memory was 148.9 MB in the beginning and 269.0 MB in the end (delta: 120.1 MB). Free memory was 104.1 MB in the beginning and 223.5 MB in the end (delta: -119.5 MB). Peak memory consumption was 603.1 kB. Max. memory is 7.1 GB. [2020-10-14 23:56:12,789 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 122.2 MB in the beginning and 121.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-14 23:56:12,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.70 ms. Allocated memory is still 148.9 MB. Free memory was 103.7 MB in the beginning and 94.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-14 23:56:12,791 INFO L168 Benchmark]: Boogie Preprocessor took 109.22 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 94.2 MB in the beginning and 182.9 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:56:12,791 INFO L168 Benchmark]: RCFGBuilder took 253.89 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 170.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-10-14 23:56:12,792 INFO L168 Benchmark]: TraceAbstraction took 3704.15 ms. Allocated memory was 204.5 MB in the beginning and 269.0 MB in the end (delta: 64.5 MB). Free memory was 169.3 MB in the beginning and 223.5 MB in the end (delta: -54.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-10-14 23:56:12,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 122.2 MB in the beginning and 121.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.70 ms. Allocated memory is still 148.9 MB. Free memory was 103.7 MB in the beginning and 94.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.22 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 94.2 MB in the beginning and 182.9 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 253.89 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 170.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3704.15 ms. Allocated memory was 204.5 MB in the beginning and 269.0 MB in the end (delta: 64.5 MB). Free memory was 169.3 MB in the beginning and 223.5 MB in the end (delta: -54.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((n <= 0 && 0 <= i) && i <= 2 * n) || ((2 * n <= i + 1 && i + 1 <= 2 * n) && i + 1 <= 2 * k)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 37 SDslu, 217 SDs, 0 SdLazy, 254 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=6, 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, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 21 NumberOfFragments, 63 HoareAnnotationTreeSize, 13 FomulaSimplifications, 105 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 77 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 10288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 12/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...