/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:18:19,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:18:19,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:18:19,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:18:19,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:18:19,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:18:19,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:18:19,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:18:19,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:18:19,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:18:19,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:18:19,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:18:19,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:18:19,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:18:19,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:18:19,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:18:19,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:18:19,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:18:19,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:18:19,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:18:19,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:18:19,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:18:19,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:18:19,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:18:19,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:18:19,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:18:19,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:18:19,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:18:19,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:18:19,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:18:19,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:18:19,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:18:19,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:18:19,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:18:19,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:18:19,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:18:19,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:18:19,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:18:19,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:18:19,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:18:19,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:18:19,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 10:18:19,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:18:19,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:18:19,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:18:19,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:18:19,352 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:18:19,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:18:19,353 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:18:19,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:18:19,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:18:19,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:18:19,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:18:19,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:18:19,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:18:19,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:18:19,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:18:19,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:18:19,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:18:19,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:18:19,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:18:19,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:18:19,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:18:19,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:18:19,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:18:19,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:18:19,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:18:19,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:18:19,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:18:19,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:18:19,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:18:19,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:18:19,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:18:19,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:18:19,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:18:19,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:18:19,883 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:18:19,884 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-25 10:18:19,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe215f33a/31384402c6294da0a080ef3eebd6b90f/FLAG173c43c1d [2020-09-25 10:18:20,505 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:18:20,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-25 10:18:20,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe215f33a/31384402c6294da0a080ef3eebd6b90f/FLAG173c43c1d [2020-09-25 10:18:20,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe215f33a/31384402c6294da0a080ef3eebd6b90f [2020-09-25 10:18:20,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:18:20,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:18:20,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:18:20,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:18:20,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:18:20,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:18:20" (1/1) ... [2020-09-25 10:18:20,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677bd6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:20, skipping insertion in model container [2020-09-25 10:18:20,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:18:20" (1/1) ... [2020-09-25 10:18:20,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:18:20,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:18:21,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:18:21,174 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:18:21,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:18:21,214 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:18:21,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21 WrapperNode [2020-09-25 10:18:21,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:18:21,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:18:21,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:18:21,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:18:21,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... [2020-09-25 10:18:21,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:18:21,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:18:21,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:18:21,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:18:21,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:18:21,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:18:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:18:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 10:18:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 10:18:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:18:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:18:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:18:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 10:18:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 10:18:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:18:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:18:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:18:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:18:21,653 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:18:21,654 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:18:21,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:18:21 BoogieIcfgContainer [2020-09-25 10:18:21,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:18:21,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:18:21,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:18:21,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:18:21,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:18:20" (1/3) ... [2020-09-25 10:18:21,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0c294b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:18:21, skipping insertion in model container [2020-09-25 10:18:21,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:18:21" (2/3) ... [2020-09-25 10:18:21,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0c294b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:18:21, skipping insertion in model container [2020-09-25 10:18:21,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:18:21" (3/3) ... [2020-09-25 10:18:21,698 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-09-25 10:18:21,723 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:18:21,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:18:21,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:18:21,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:18:21,825 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:18:21,829 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:18:21,829 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:18:21,829 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:18:21,830 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:18:21,830 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:18:21,830 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:18:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 10:18:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 10:18:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:21,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:21,863 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:21,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2104509233, now seen corresponding path program 1 times [2020-09-25 10:18:21,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:21,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282734874] [2020-09-25 10:18:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:22,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:18:22,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:22,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-25 10:18:22,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:22,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:22,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 10:18:22,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:22,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:18:22,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:22,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:22,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:22,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:18:22,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:22,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:22,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282734874] [2020-09-25 10:18:22,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:18:22,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 10:18:22,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986262001] [2020-09-25 10:18:22,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 10:18:22,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 10:18:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 10:18:22,165 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 10:18:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:22,198 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 10:18:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 10:18:22,199 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-25 10:18:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:22,209 INFO L225 Difference]: With dead ends: 41 [2020-09-25 10:18:22,209 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 10:18:22,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 10:18:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 10:18:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 10:18:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 10:18:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-25 10:18:22,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-25 10:18:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:22,256 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-25 10:18:22,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 10:18:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-25 10:18:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 10:18:22,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:22,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:22,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:18:22,258 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:22,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2097121065, now seen corresponding path program 1 times [2020-09-25 10:18:22,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:22,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198664823] [2020-09-25 10:18:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:22,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:22,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:18:22,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 10:18:22,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:22,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:18:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:18:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:22,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:22,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:22,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:22,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:22,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:18:22,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:22,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:22,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:22,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198664823] [2020-09-25 10:18:22,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:18:22,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 10:18:22,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990290540] [2020-09-25 10:18:22,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 10:18:22,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:22,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 10:18:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 10:18:22,374 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2020-09-25 10:18:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:22,399 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-09-25 10:18:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 10:18:22,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-25 10:18:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:22,401 INFO L225 Difference]: With dead ends: 28 [2020-09-25 10:18:22,401 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 10:18:22,403 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 [2020-09-25 10:18:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 10:18:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 10:18:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 10:18:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 10:18:22,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 10:18:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:22,410 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 10:18:22,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 10:18:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 10:18:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 10:18:22,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:22,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:22,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:18:22,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash -588245929, now seen corresponding path program 1 times [2020-09-25 10:18:22,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:22,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55459239] [2020-09-25 10:18:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:22,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:22,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 10:18:22,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:18:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-09-25 10:18:22,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:22,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:18:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 10:18:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:18:22,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:22,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:22,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:22,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:22,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:22,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:18:22,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:22,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:22,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:22,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:22,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55459239] [2020-09-25 10:18:22,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:22,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:18:22,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194968612] [2020-09-25 10:18:22,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:18:22,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:22,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:18:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:18:22,977 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-09-25 10:18:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:23,163 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-25 10:18:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 10:18:23,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-25 10:18:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:23,165 INFO L225 Difference]: With dead ends: 35 [2020-09-25 10:18:23,165 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 10:18:23,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:18:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 10:18:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-25 10:18:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 10:18:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 10:18:23,183 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 10:18:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:23,184 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 10:18:23,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:18:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 10:18:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 10:18:23,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:23,185 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:23,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:18:23,185 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:23,188 INFO L82 PathProgramCache]: Analyzing trace with hash -590441495, now seen corresponding path program 2 times [2020-09-25 10:18:23,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:23,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952725369] [2020-09-25 10:18:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:23,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:23,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 10:18:23,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:18:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-09-25 10:18:23,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:23,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:23,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 10:18:23,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:23,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 10:18:23,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:18:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:23,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:23,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:23,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:23,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:23,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:18:23,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:23,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:23,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:23,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:18:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:23,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952725369] [2020-09-25 10:18:23,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:23,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:18:23,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532881136] [2020-09-25 10:18:23,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:18:23,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:18:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:18:23,825 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-09-25 10:18:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:24,060 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-25 10:18:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:18:24,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-09-25 10:18:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:24,063 INFO L225 Difference]: With dead ends: 38 [2020-09-25 10:18:24,064 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 10:18:24,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:18:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 10:18:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 10:18:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 10:18:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 10:18:24,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 10:18:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:24,076 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 10:18:24,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:18:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 10:18:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 10:18:24,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:24,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:24,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:18:24,079 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -934609001, now seen corresponding path program 3 times [2020-09-25 10:18:24,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:24,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881236583] [2020-09-25 10:18:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:24,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:25,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 10:18:25,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:18:25,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-09-25 10:18:25,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:25,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:25,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 10:18:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:18:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:25,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:25,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:25,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:25,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:25,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:25,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:25,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:25,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:25,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:25,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881236583] [2020-09-25 10:18:25,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:25,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 10:18:25,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920847504] [2020-09-25 10:18:25,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 10:18:25,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 10:18:25,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:18:25,289 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-09-25 10:18:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:25,590 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-25 10:18:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 10:18:25,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-09-25 10:18:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:25,592 INFO L225 Difference]: With dead ends: 43 [2020-09-25 10:18:25,592 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 10:18:25,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-09-25 10:18:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 10:18:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-25 10:18:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 10:18:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 10:18:25,606 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 10:18:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:25,607 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 10:18:25,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 10:18:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 10:18:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 10:18:25,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:25,609 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:25,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:18:25,609 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1774497961, now seen corresponding path program 4 times [2020-09-25 10:18:25,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:25,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301654148] [2020-09-25 10:18:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:25,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:25,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:26,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 10:18:26,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:18:26,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-09-25 10:18:26,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:26,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:26,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 10:18:26,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:26,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 10:18:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:26,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:26,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:26,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:26,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:26,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:26,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:26,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:26,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:26,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301654148] [2020-09-25 10:18:26,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:26,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 10:18:26,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689684464] [2020-09-25 10:18:26,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 10:18:26,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 10:18:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:18:26,616 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 18 states. [2020-09-25 10:18:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:27,012 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-09-25 10:18:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 10:18:27,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-09-25 10:18:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:27,013 INFO L225 Difference]: With dead ends: 48 [2020-09-25 10:18:27,013 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 10:18:27,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-09-25 10:18:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 10:18:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-25 10:18:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 10:18:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 10:18:27,020 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 10:18:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:27,021 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 10:18:27,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 10:18:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 10:18:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 10:18:27,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:27,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:27,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:18:27,023 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:27,023 INFO L82 PathProgramCache]: Analyzing trace with hash -194454825, now seen corresponding path program 5 times [2020-09-25 10:18:27,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:27,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719992863] [2020-09-25 10:18:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:27,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:28,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 10:18:28,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:18:28,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-09-25 10:18:28,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:28,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 10:18:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:28,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 10:18:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:28,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:28,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:28,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:28,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:28,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:28,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:28,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:28,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:28,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:28,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719992863] [2020-09-25 10:18:28,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:28,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 10:18:28,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147215492] [2020-09-25 10:18:28,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 10:18:28,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:28,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 10:18:28,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-09-25 10:18:28,517 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 21 states. [2020-09-25 10:18:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:29,033 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-09-25 10:18:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 10:18:29,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-09-25 10:18:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:29,035 INFO L225 Difference]: With dead ends: 53 [2020-09-25 10:18:29,035 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 10:18:29,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 10:18:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 10:18:29,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-25 10:18:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 10:18:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-25 10:18:29,042 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-25 10:18:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:29,043 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-25 10:18:29,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 10:18:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-25 10:18:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 10:18:29,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:29,044 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:29,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:18:29,044 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1783487849, now seen corresponding path program 6 times [2020-09-25 10:18:29,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:29,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13484715] [2020-09-25 10:18:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-09-25 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:30,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 10:18:30,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:31,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:31,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:31,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:31,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:31,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:31,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:31,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:31,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:31,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:31,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:31,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:31,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:31,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13484715] [2020-09-25 10:18:31,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:31,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 10:18:31,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600835582] [2020-09-25 10:18:31,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 10:18:31,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 10:18:31,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-09-25 10:18:31,141 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-09-25 10:18:31,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:31,849 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 10:18:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 10:18:31,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-09-25 10:18:31,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:31,851 INFO L225 Difference]: With dead ends: 58 [2020-09-25 10:18:31,851 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 10:18:31,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 10:18:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 10:18:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-09-25 10:18:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 10:18:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 10:18:31,859 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-25 10:18:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:31,859 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 10:18:31,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 10:18:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 10:18:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 10:18:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:31,860 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:31,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:18:31,861 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1046324759, now seen corresponding path program 7 times [2020-09-25 10:18:31,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:31,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007600675] [2020-09-25 10:18:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:33,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:33,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:33,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 10:18:33,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:18:33,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1999 [2020-09-25 10:18:33,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:33,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 10:18:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 10:18:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:34,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:34,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:34,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:34,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:34,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:34,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:34,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:34,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:34,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:34,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:34,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007600675] [2020-09-25 10:18:34,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:34,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 10:18:34,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584963985] [2020-09-25 10:18:34,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 10:18:34,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 10:18:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-09-25 10:18:34,362 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2020-09-25 10:18:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:35,351 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-25 10:18:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 10:18:35,352 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-09-25 10:18:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:35,353 INFO L225 Difference]: With dead ends: 63 [2020-09-25 10:18:35,354 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 10:18:35,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2020-09-25 10:18:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 10:18:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-25 10:18:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 10:18:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-25 10:18:35,362 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-25 10:18:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:35,362 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-25 10:18:35,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 10:18:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-25 10:18:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 10:18:35,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:35,363 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:35,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 10:18:35,364 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:35,364 INFO L82 PathProgramCache]: Analyzing trace with hash 232135209, now seen corresponding path program 8 times [2020-09-25 10:18:35,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:35,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470386683] [2020-09-25 10:18:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:36,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:36,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:36,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:38,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:38,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 10:18:38,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:18:38,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3046 [2020-09-25 10:18:38,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:38,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-25 10:18:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:38,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 10:18:38,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:18:39,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:39,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:39,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:39,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:39,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:39,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:39,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:39,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:39,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470386683] [2020-09-25 10:18:39,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:39,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 10:18:39,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011111125] [2020-09-25 10:18:39,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 10:18:39,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:39,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 10:18:39,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2020-09-25 10:18:39,019 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2020-09-25 10:18:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:40,120 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-09-25 10:18:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-25 10:18:40,120 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2020-09-25 10:18:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:40,122 INFO L225 Difference]: With dead ends: 68 [2020-09-25 10:18:40,122 INFO L226 Difference]: Without dead ends: 63 [2020-09-25 10:18:40,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 10:18:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-25 10:18:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-09-25 10:18:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 10:18:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-25 10:18:40,129 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-25 10:18:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:40,130 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-25 10:18:40,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 10:18:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-25 10:18:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 10:18:40,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:40,131 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:40,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 10:18:40,131 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash 977101143, now seen corresponding path program 9 times [2020-09-25 10:18:40,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:40,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407898956] [2020-09-25 10:18:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:40,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:40,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:40,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:41,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:43,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:43,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 10:18:43,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:18:43,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2963 [2020-09-25 10:18:43,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:43,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 10:18:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:43,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 10:18:43,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:43,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:43,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:43,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:43,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:43,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:43,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:43,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:43,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:43,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:43,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:43,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407898956] [2020-09-25 10:18:43,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:43,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-25 10:18:43,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650712474] [2020-09-25 10:18:43,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-25 10:18:43,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-25 10:18:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 10:18:43,815 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 33 states. [2020-09-25 10:18:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:45,291 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-09-25 10:18:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 10:18:45,292 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-09-25 10:18:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:45,293 INFO L225 Difference]: With dead ends: 73 [2020-09-25 10:18:45,293 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 10:18:45,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=194, Invalid=2998, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 10:18:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 10:18:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-25 10:18:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 10:18:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-25 10:18:45,302 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-25 10:18:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:45,302 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-25 10:18:45,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-25 10:18:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-25 10:18:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 10:18:45,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:18:45,304 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:18:45,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 10:18:45,304 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:18:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:18:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 751396585, now seen corresponding path program 10 times [2020-09-25 10:18:45,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:18:45,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82259826] [2020-09-25 10:18:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:18:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:45,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:45,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:46,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:47,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:47,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:50,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:50,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:50,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 10:18:50,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:18:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 10:18:50,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:50,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 10:18:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 10:18:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 10:18:50,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:18:51,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:18:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:18:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:18:51,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:18:51,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:18:51,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:18:51,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:18:51,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:18:51,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:18:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:18:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:18:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:18:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:18:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:18:51,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82259826] [2020-09-25 10:18:51,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:18:51,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-25 10:18:51,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457844187] [2020-09-25 10:18:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-25 10:18:51,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:18:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-25 10:18:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 10:18:51,207 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2020-09-25 10:18:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:18:53,382 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-25 10:18:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 10:18:53,383 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-09-25 10:18:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:18:53,383 INFO L225 Difference]: With dead ends: 67 [2020-09-25 10:18:53,384 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 10:18:53,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2020-09-25 10:18:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 10:18:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 10:18:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 10:18:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 10:18:53,387 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-09-25 10:18:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:18:53,387 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 10:18:53,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-25 10:18:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 10:18:53,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 10:18:53,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 10:18:53,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 10:18:53,669 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 10:18:53,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 10:18:53,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 10:18:53,670 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 10:18:53,670 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 10:18:53,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 10:18:53,670 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 10:18:53,671 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-25 10:18:53,672 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-25 10:18:53,673 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 10:18:53,673 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (let ((.cse4 (<= main_~x~0 (+ main_~y~0 16)))) (or (let ((.cse0 (+ main_~x~0 51))) (and (<= .cse0 main_~y~0) (<= main_~y~0 .cse0))) (let ((.cse1 (+ main_~x~0 50))) (and (<= 0 .cse1) (<= .cse1 0))) (let ((.cse3 (* 2 main_~y~0)) (.cse2 (+ main_~x~0 53))) (and (<= .cse2 .cse3) .cse4 (<= .cse3 .cse2))) (and (<= main_~x~0 17) (<= (+ main_~x~0 60) (* 4 main_~y~0))) (and .cse4 (<= (+ main_~x~0 4) (* 6 main_~y~0))) (let ((.cse6 (* 3 main_~y~0)) (.cse5 (+ main_~x~0 56))) (and .cse4 (<= .cse5 .cse6) (<= .cse6 .cse5))))) [2020-09-25 10:18:53,673 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 10:18:53,673 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (<= 11 main_~y~0) (<= (+ main_~x~0 95) (* 9 main_~y~0))) (and (<= main_~x~0 (+ main_~y~0 16)) (<= (+ main_~x~0 4) (* 6 main_~y~0)) (<= 1 main_~y~0))) [2020-09-25 10:18:53,674 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 10:18:53,674 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 10:18:53,674 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 10:18:53,674 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 10:18:53,674 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 10:18:53,674 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 10:18:53,674 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 10:18:53,675 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 10:18:53,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:18:53 BoogieIcfgContainer [2020-09-25 10:18:53,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 10:18:53,728 INFO L168 Benchmark]: Toolchain (without parser) took 32837.17 ms. Allocated memory was 138.9 MB in the beginning and 424.1 MB in the end (delta: 285.2 MB). Free memory was 102.4 MB in the beginning and 291.4 MB in the end (delta: -189.0 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. [2020-09-25 10:18:53,732 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-25 10:18:53,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.29 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 92.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-09-25 10:18:53,735 INFO L168 Benchmark]: Boogie Preprocessor took 39.28 ms. Allocated memory is still 138.9 MB. Free memory was 92.2 MB in the beginning and 90.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-25 10:18:53,736 INFO L168 Benchmark]: RCFGBuilder took 419.83 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 90.9 MB in the beginning and 165.5 MB in the end (delta: -74.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 10:18:53,738 INFO L168 Benchmark]: TraceAbstraction took 32043.83 ms. Allocated memory was 199.2 MB in the beginning and 424.1 MB in the end (delta: 224.9 MB). Free memory was 164.5 MB in the beginning and 291.4 MB in the end (delta: -126.9 MB). Peak memory consumption was 98.0 MB. Max. memory is 7.1 GB. [2020-09-25 10:18:53,744 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 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 324.29 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 92.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.28 ms. Allocated memory is still 138.9 MB. Free memory was 92.2 MB in the beginning and 90.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.83 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 90.9 MB in the beginning and 165.5 MB in the end (delta: -74.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32043.83 ms. Allocated memory was 199.2 MB in the beginning and 424.1 MB in the end (delta: 224.9 MB). Free memory was 164.5 MB in the beginning and 291.4 MB in the end (delta: -126.9 MB). Peak memory consumption was 98.0 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: (((((x + 51 <= y && y <= x + 51) || (0 <= x + 50 && x + 50 <= 0)) || ((x + 53 <= 2 * y && x <= y + 16) && 2 * y <= x + 53)) || (x <= 17 && x + 60 <= 4 * y)) || (x <= y + 16 && x + 4 <= 6 * y)) || ((x <= y + 16 && x + 56 <= 3 * y) && 3 * y <= x + 56) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.5s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 249 SDslu, 2142 SDs, 0 SdLazy, 5086 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred 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, 12 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 38 NumberOfFragments, 120 HoareAnnotationTreeSize, 18 FomulaSimplifications, 89 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 170 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 22.7s InterpolantComputationTime, 467 NumberOfCodeBlocks, 467 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 455 ConstructedInterpolants, 0 QuantifiedInterpolants, 109615 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/880 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...