/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:41:52,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:41:52,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:41:52,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:41:52,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:41:52,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:41:52,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:41:52,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:41:52,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:41:52,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:41:52,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:41:52,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:41:52,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:41:52,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:41:52,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:41:52,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:41:52,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:41:52,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:41:52,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:41:52,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:41:52,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:41:52,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:41:52,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:41:52,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:41:52,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:41:52,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:41:52,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:41:52,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:41:52,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:41:52,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:41:52,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:41:52,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:41:52,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:41:52,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:41:52,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:41:52,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:41:52,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:41:52,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:41:52,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:41:52,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:41:52,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:41:52,582 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 [2020-09-24 20:41:52,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:41:52,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:41:52,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:41:52,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:41:52,638 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:41:52,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:41:52,639 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:41:52,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:41:52,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:41:52,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:41:52,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:41:52,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:41:52,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:41:52,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:41:52,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:41:52,642 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:41:52,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:41:52,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:41:52,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:41:52,643 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:41:52,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:41:52,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:52,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:41:52,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:41:52,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:41:52,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:41:52,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:41:52,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:41:52,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:41:52,645 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:41:53,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:41:53,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:41:53,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:41:53,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:41:53,198 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:41:53,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-24 20:41:53,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f00cec9a4/64e308c7741a4e3580b32596ce0fc25d/FLAGf0410f666 [2020-09-24 20:41:53,787 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:41:53,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-24 20:41:53,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f00cec9a4/64e308c7741a4e3580b32596ce0fc25d/FLAGf0410f666 [2020-09-24 20:41:54,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f00cec9a4/64e308c7741a4e3580b32596ce0fc25d [2020-09-24 20:41:54,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:41:54,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:41:54,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:54,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:41:54,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:41:54,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfcebea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54, skipping insertion in model container [2020-09-24 20:41:54,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:41:54,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:41:54,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:54,468 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:41:54,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:54,624 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:41:54,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54 WrapperNode [2020-09-24 20:41:54,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:54,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:41:54,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:41:54,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:41:54,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (1/1) ... [2020-09-24 20:41:54,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:41:54,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:41:54,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:41:54,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:41:54,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (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 [2020-09-24 20:41:54,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:41:54,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:41:54,796 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:41:54,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:41:54,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:41:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:41:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:41:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:41:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:41:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:41:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:41:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:41:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:41:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:41:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:41:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:41:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:41:55,225 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:41:55,226 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 20:41:55,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:55 BoogieIcfgContainer [2020-09-24 20:41:55,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:41:55,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:41:55,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:41:55,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:41:55,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:41:54" (1/3) ... [2020-09-24 20:41:55,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ada9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:55, skipping insertion in model container [2020-09-24 20:41:55,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:54" (2/3) ... [2020-09-24 20:41:55,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ada9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:55, skipping insertion in model container [2020-09-24 20:41:55,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:55" (3/3) ... [2020-09-24 20:41:55,245 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-24 20:41:55,258 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:41:55,270 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:41:55,304 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:41:55,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:41:55,337 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:41:55,337 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:41:55,337 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:41:55,337 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:41:55,337 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:41:55,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:41:55,338 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:41:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-24 20:41:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 20:41:55,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:55,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:55,372 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-24 20:41:55,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:55,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493542604] [2020-09-24 20:41:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:55,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:55,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 20:41:55,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:41:55,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-09-24 20:41:55,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:55,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:55,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 20:41:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:55,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:41:55,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:55,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:55,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:56,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:56,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:41:56,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:56,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:56,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493542604] [2020-09-24 20:41:56,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:41:56,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 20:41:56,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583122375] [2020-09-24 20:41:56,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 20:41:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 20:41:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 20:41:56,053 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-24 20:41:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:56,318 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-24 20:41:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 20:41:56,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 20:41:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:56,333 INFO L225 Difference]: With dead ends: 188 [2020-09-24 20:41:56,334 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 20:41:56,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 20:41:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 20:41:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-24 20:41:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 20:41:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-24 20:41:56,401 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-24 20:41:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:56,402 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-24 20:41:56,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 20:41:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-24 20:41:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 20:41:56,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:56,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:56,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:41:56,406 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-24 20:41:56,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:56,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662393693] [2020-09-24 20:41:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:56,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:56,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 20:41:56,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:41:56,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-09-24 20:41:56,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:41:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:41:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 20:41:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:56,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:56,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:56,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:56,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:56,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:41:56,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:56,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:56,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662393693] [2020-09-24 20:41:56,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:41:56,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 20:41:56,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764318527] [2020-09-24 20:41:56,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 20:41:56,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 20:41:56,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:41:56,801 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-24 20:41:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:56,979 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-24 20:41:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 20:41:56,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-24 20:41:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:56,982 INFO L225 Difference]: With dead ends: 144 [2020-09-24 20:41:56,982 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 20:41:56,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 20:41:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 20:41:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-24 20:41:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 20:41:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-24 20:41:56,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-24 20:41:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:56,997 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-24 20:41:56,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 20:41:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-24 20:41:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 20:41:56,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:56,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:57,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:41:57,000 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:57,000 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-24 20:41:57,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:57,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921307733] [2020-09-24 20:41:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:57,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:57,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 20:41:57,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:41:57,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-09-24 20:41:57,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:57,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:41:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 20:41:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:41:57,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:57,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:57,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:57,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:41:57,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:57,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:57,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:57,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:57,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921307733] [2020-09-24 20:41:57,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:57,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 20:41:57,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43432120] [2020-09-24 20:41:57,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:41:57,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:41:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:41:57,697 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-24 20:41:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:57,913 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-09-24 20:41:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:41:57,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-24 20:41:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:57,915 INFO L225 Difference]: With dead ends: 140 [2020-09-24 20:41:57,915 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 20:41:57,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:41:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 20:41:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-24 20:41:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 20:41:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-24 20:41:57,926 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-24 20:41:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:57,927 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-24 20:41:57,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:41:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-24 20:41:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 20:41:57,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:57,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:57,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:41:57,929 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1625165933, now seen corresponding path program 2 times [2020-09-24 20:41:57,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:57,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309173279] [2020-09-24 20:41:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:57,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:58,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 20:41:58,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:41:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-09-24 20:41:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:41:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 20:41:58,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 20:41:58,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:59,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:59,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:59,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:59,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:41:59,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:59,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:41:59,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:59,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:59,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:59,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:59,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:41:59,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309173279] [2020-09-24 20:41:59,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:59,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 20:41:59,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657000912] [2020-09-24 20:41:59,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:41:59,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:41:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:41:59,138 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-24 20:41:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:59,383 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-09-24 20:41:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:41:59,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 20:41:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:59,385 INFO L225 Difference]: With dead ends: 147 [2020-09-24 20:41:59,385 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 20:41:59,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:41:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 20:41:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-24 20:41:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 20:41:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-24 20:41:59,395 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-24 20:41:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:59,396 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-24 20:41:59,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:41:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-24 20:41:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 20:41:59,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:59,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:59,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:41:59,398 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2072721689, now seen corresponding path program 3 times [2020-09-24 20:41:59,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:59,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818486313] [2020-09-24 20:41:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:59,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 20:42:00,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-09-24 20:42:00,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:42:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 20:42:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 20:42:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:00,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:00,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:00,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:42:00,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:00,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:00,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:00,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:42:00,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818486313] [2020-09-24 20:42:00,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:00,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:42:00,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715202674] [2020-09-24 20:42:00,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:42:00,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:00,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:42:00,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:42:00,838 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-24 20:42:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:01,122 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-09-24 20:42:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:42:01,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 20:42:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:01,126 INFO L225 Difference]: With dead ends: 154 [2020-09-24 20:42:01,126 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 20:42:01,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:42:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 20:42:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-24 20:42:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 20:42:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-24 20:42:01,147 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-24 20:42:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:01,148 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-24 20:42:01,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:42:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-24 20:42:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 20:42:01,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:01,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:01,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:42:01,154 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 480988371, now seen corresponding path program 4 times [2020-09-24 20:42:01,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:01,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727096245] [2020-09-24 20:42:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 20:42:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:03,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-09-24 20:42:03,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:42:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 20:42:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 20:42:03,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:03,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:03,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:03,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 20:42:03,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:03,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:03,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:03,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:42:03,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727096245] [2020-09-24 20:42:03,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:03,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:42:03,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520995848] [2020-09-24 20:42:03,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:42:03,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:42:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:42:03,363 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-24 20:42:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:03,694 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-09-24 20:42:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 20:42:03,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-24 20:42:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:03,696 INFO L225 Difference]: With dead ends: 156 [2020-09-24 20:42:03,696 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 20:42:03,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:42:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 20:42:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-24 20:42:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 20:42:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-24 20:42:03,715 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-24 20:42:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:03,719 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-24 20:42:03,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:42:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-24 20:42:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 20:42:03,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:03,726 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:03,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:42:03,726 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:03,727 INFO L82 PathProgramCache]: Analyzing trace with hash 662336473, now seen corresponding path program 5 times [2020-09-24 20:42:03,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:03,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515828636] [2020-09-24 20:42:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 20:42:03,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-09-24 20:42:03,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:03,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:42:03,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:42:03,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:03,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:03,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:03,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:42:03,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:03,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:03,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 20:42:03,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515828636] [2020-09-24 20:42:03,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:03,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 20:42:03,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599860950] [2020-09-24 20:42:03,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:42:03,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:42:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:03,996 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-24 20:42:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:04,154 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-24 20:42:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:42:04,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-24 20:42:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:04,156 INFO L225 Difference]: With dead ends: 203 [2020-09-24 20:42:04,156 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 20:42:04,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:42:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 20:42:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-24 20:42:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 20:42:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 20:42:04,174 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-24 20:42:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:04,174 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 20:42:04,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:42:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 20:42:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 20:42:04,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:04,175 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:04,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:42:04,175 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1088777214, now seen corresponding path program 6 times [2020-09-24 20:42:04,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:04,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961306814] [2020-09-24 20:42:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:04,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:04,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 20:42:04,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:04,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-24 20:42:04,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:04,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:42:04,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:42:04,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 20:42:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:42:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:04,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 20:42:04,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961306814] [2020-09-24 20:42:04,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:04,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 20:42:04,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331152528] [2020-09-24 20:42:04,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:42:04,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:04,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:42:04,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:42:04,587 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-24 20:42:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:04,803 INFO L93 Difference]: Finished difference Result 210 states and 220 transitions. [2020-09-24 20:42:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:42:04,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-24 20:42:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:04,805 INFO L225 Difference]: With dead ends: 210 [2020-09-24 20:42:04,805 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 20:42:04,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:42:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 20:42:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-24 20:42:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 20:42:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-24 20:42:04,813 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-24 20:42:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:04,813 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-24 20:42:04,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:42:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-24 20:42:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 20:42:04,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:04,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:04,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:42:04,815 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1019285447, now seen corresponding path program 7 times [2020-09-24 20:42:04,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:04,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166230788] [2020-09-24 20:42:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:04,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:05,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:05,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 20:42:05,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-09-24 20:42:05,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:42:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:42:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 20:42:05,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:05,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:05,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:05,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:05,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:05,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:42:05,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:05,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:05,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:05,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:05,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 20:42:05,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166230788] [2020-09-24 20:42:05,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:05,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:42:05,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747284871] [2020-09-24 20:42:05,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:42:05,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:42:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:42:05,310 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-24 20:42:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:05,576 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-09-24 20:42:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:42:05,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-24 20:42:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:05,578 INFO L225 Difference]: With dead ends: 217 [2020-09-24 20:42:05,578 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 20:42:05,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:42:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 20:42:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-24 20:42:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 20:42:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-24 20:42:05,586 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-24 20:42:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:05,586 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-24 20:42:05,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:42:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-24 20:42:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 20:42:05,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:05,588 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:05,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:42:05,588 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1496431714, now seen corresponding path program 8 times [2020-09-24 20:42:05,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:05,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121879542] [2020-09-24 20:42:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:06,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:06,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 20:42:06,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-09-24 20:42:06,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:42:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 20:42:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 20:42:06,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:06,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:06,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:06,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:06,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:42:06,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:06,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:42:06,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:06,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:06,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 20:42:06,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121879542] [2020-09-24 20:42:06,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:06,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:42:06,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843139713] [2020-09-24 20:42:06,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:42:06,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:42:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:42:06,214 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-24 20:42:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:06,525 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2020-09-24 20:42:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 20:42:06,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-24 20:42:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:06,527 INFO L225 Difference]: With dead ends: 219 [2020-09-24 20:42:06,527 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 20:42:06,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:42:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 20:42:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-24 20:42:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 20:42:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-24 20:42:06,535 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-24 20:42:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:06,536 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-24 20:42:06,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:42:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-24 20:42:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 20:42:06,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:06,537 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:06,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 20:42:06,538 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-24 20:42:06,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:06,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172601278] [2020-09-24 20:42:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:42:06,568 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:42:06,569 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:42:06,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 20:42:06,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:42:06 BoogieIcfgContainer [2020-09-24 20:42:06,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:42:06,633 INFO L168 Benchmark]: Toolchain (without parser) took 12475.16 ms. Allocated memory was 148.4 MB in the beginning and 313.0 MB in the end (delta: 164.6 MB). Free memory was 102.6 MB in the beginning and 136.2 MB in the end (delta: -33.6 MB). Peak memory consumption was 131.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:06,636 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 20:42:06,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.78 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 102.0 MB in the beginning and 183.3 MB in the end (delta: -81.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:06,638 INFO L168 Benchmark]: Boogie Preprocessor took 88.58 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:06,639 INFO L168 Benchmark]: RCFGBuilder took 520.20 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 156.2 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:06,642 INFO L168 Benchmark]: TraceAbstraction took 11391.81 ms. Allocated memory was 204.5 MB in the beginning and 313.0 MB in the end (delta: 108.5 MB). Free memory was 155.6 MB in the beginning and 136.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:06,648 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 464.78 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 102.0 MB in the beginning and 183.3 MB in the end (delta: -81.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.58 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 520.20 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 156.2 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11391.81 ms. Allocated memory was 204.5 MB in the beginning and 313.0 MB in the end (delta: 108.5 MB). Free memory was 155.6 MB in the beginning and 136.2 MB in the end (delta: 19.5 MB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND FALSE !(i<5) [L26] EXPR string_A[5 -1] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND FALSE !(i<5) [L30] EXPR string_B[5 -1] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 [L33] EXPR string_A[nc_A] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 [L37] EXPR string_B[nc_B] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 [L44] COND FALSE !((inc_B-1)<