/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=HIGHLEXORDER --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 22:55:31,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:55:31,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:55:31,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:55:31,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:55:31,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:55:31,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:55:31,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:55:31,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:55:31,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:55:31,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:55:31,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:55:31,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:55:31,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:55:31,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:55:31,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:55:31,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:55:31,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:55:31,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:55:31,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:55:31,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:55:31,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:55:31,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:55:31,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:55:31,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:55:31,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:55:31,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:55:31,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:55:31,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:55:31,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:55:31,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:55:31,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:55:31,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:55:31,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:55:31,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:55:31,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:55:31,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:55:31,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:55:31,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:55:31,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:55:31,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:55:31,625 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 22:55:31,653 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:55:31,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:55:31,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:55:31,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:55:31,655 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:55:31,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:55:31,655 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:55:31,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:55:31,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:55:31,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:55:31,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:55:31,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:55:31,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:55:31,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:55:31,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:55:31,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:55:31,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:55:31,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:55:31,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:55:31,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:55:31,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:55:31,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:55:31,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:55:31,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:55:31,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:55:31,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:55:31,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:55:31,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:55:31,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:55:31,660 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:55:32,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:55:32,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:55:32,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:55:32,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:55:32,162 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:55:32,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-24 22:55:32,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3383b9ad7/9ca15911290a4cf08d6236fce016077a/FLAG51cf152f5 [2020-09-24 22:55:32,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:55:32,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-24 22:55:32,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3383b9ad7/9ca15911290a4cf08d6236fce016077a/FLAG51cf152f5 [2020-09-24 22:55:33,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3383b9ad7/9ca15911290a4cf08d6236fce016077a [2020-09-24 22:55:33,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:55:33,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:55:33,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:33,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:55:33,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:55:33,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f67d99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33, skipping insertion in model container [2020-09-24 22:55:33,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:55:33,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:55:33,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:33,497 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:55:33,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:33,558 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:55:33,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33 WrapperNode [2020-09-24 22:55:33,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:33,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:55:33,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:55:33,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:55:33,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:55:33,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:55:33,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:55:33,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:55:33,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (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 22:55:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:55:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:55:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 22:55:33,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:55:33,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:55:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:55:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 22:55:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 22:55:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:55:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 22:55:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:55:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:55:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:55:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:55:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:55:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:55:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:55:34,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:55:34,314 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 22:55:34,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:34 BoogieIcfgContainer [2020-09-24 22:55:34,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:55:34,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:55:34,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:55:34,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:55:34,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:55:33" (1/3) ... [2020-09-24 22:55:34,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a37226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:34, skipping insertion in model container [2020-09-24 22:55:34,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (2/3) ... [2020-09-24 22:55:34,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a37226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:34, skipping insertion in model container [2020-09-24 22:55:34,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:34" (3/3) ... [2020-09-24 22:55:34,333 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-24 22:55:34,345 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:55:34,356 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:55:34,377 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:55:34,406 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:55:34,407 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:55:34,407 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:55:34,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:55:34,407 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:55:34,407 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:55:34,407 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:55:34,407 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:55:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-24 22:55:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 22:55:34,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:34,444 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 22:55:34,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-24 22:55:34,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:34,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528424035] [2020-09-24 22:55:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:34,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:34,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 22:55:34,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 22:55:34,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-09-24 22:55:34,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-24 22:55:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:34,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:55:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:35,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 22:55:35,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:35,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,083 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 22:55:35,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528424035] [2020-09-24 22:55:35,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:35,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 22:55:35,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324599817] [2020-09-24 22:55:35,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 22:55:35,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:35,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 22:55:35,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:55:35,119 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-24 22:55:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:35,415 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-24 22:55:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 22:55:35,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 22:55:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:35,431 INFO L225 Difference]: With dead ends: 188 [2020-09-24 22:55:35,432 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 22:55:35,437 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 22:55:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 22:55:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-24 22:55:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 22:55:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-24 22:55:35,522 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-24 22:55:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:35,523 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-24 22:55:35,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 22:55:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-24 22:55:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 22:55:35,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:35,528 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 22:55:35,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:55:35,528 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:35,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-24 22:55:35,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:35,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437336696] [2020-09-24 22:55:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 22:55:35,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-09-24 22:55:35,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 22:55:35,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:55:35,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:35,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 22:55:35,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:35,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:35,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,989 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 22:55:35,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437336696] [2020-09-24 22:55:35,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:35,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:55:36,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786534309] [2020-09-24 22:55:36,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:55:36,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:55:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:55:36,005 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-24 22:55:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:36,219 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-24 22:55:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:55:36,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-24 22:55:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:36,223 INFO L225 Difference]: With dead ends: 144 [2020-09-24 22:55:36,223 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 22:55:36,225 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 22:55:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 22:55:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-24 22:55:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 22:55:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-24 22:55:36,247 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-24 22:55:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:36,248 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-24 22:55:36,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:55:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-24 22:55:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 22:55:36,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:36,254 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 22:55:36,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:55:36,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-24 22:55:36,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:36,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795961435] [2020-09-24 22:55:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:36,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 22:55:36,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:36,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-09-24 22:55:36,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 22:55:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 22:55:36,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:36,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:36,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:36,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:55:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:37,000 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 22:55:37,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795961435] [2020-09-24 22:55:37,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:37,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:55:37,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372046122] [2020-09-24 22:55:37,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:55:37,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:37,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:55:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:55:37,004 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-24 22:55:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:37,281 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-09-24 22:55:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:55:37,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-24 22:55:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:37,284 INFO L225 Difference]: With dead ends: 140 [2020-09-24 22:55:37,284 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 22:55:37,285 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 22:55:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 22:55:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-24 22:55:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 22:55:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-24 22:55:37,306 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-24 22:55:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:37,306 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-24 22:55:37,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:55:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-24 22:55:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 22:55:37,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:37,309 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 22:55:37,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:55:37,309 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1625165933, now seen corresponding path program 2 times [2020-09-24 22:55:37,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:37,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3445901] [2020-09-24 22:55:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:38,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:38,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 22:55:38,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-09-24 22:55:38,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 22:55:38,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 22:55:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:38,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:38,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:38,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:38,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:38,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:38,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 22:55:38,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:38,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:38,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:38,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:38,290 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 22:55:38,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3445901] [2020-09-24 22:55:38,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:38,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:55:38,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258135860] [2020-09-24 22:55:38,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:55:38,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:38,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:55:38,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:55:38,293 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-24 22:55:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:38,558 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-09-24 22:55:38,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 22:55:38,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 22:55:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:38,560 INFO L225 Difference]: With dead ends: 147 [2020-09-24 22:55:38,560 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 22:55:38,561 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 22:55:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 22:55:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-24 22:55:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 22:55:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-24 22:55:38,569 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-24 22:55:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:38,570 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-24 22:55:38,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:55:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-24 22:55:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 22:55:38,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:38,572 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 22:55:38,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:55:38,572 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2072721689, now seen corresponding path program 3 times [2020-09-24 22:55:38,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:38,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314208879] [2020-09-24 22:55:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:38,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 22:55:39,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:39,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-09-24 22:55:39,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 22:55:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 22:55:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:39,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:39,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:55:39,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:39,898 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 22:55:39,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314208879] [2020-09-24 22:55:39,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:39,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:55:39,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422230242] [2020-09-24 22:55:39,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:55:39,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:55:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:55:39,902 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-24 22:55:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:40,216 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-09-24 22:55:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:55:40,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 22:55:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:40,219 INFO L225 Difference]: With dead ends: 154 [2020-09-24 22:55:40,219 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 22:55:40,221 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 22:55:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 22:55:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-24 22:55:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 22:55:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-24 22:55:40,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-24 22:55:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:40,233 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-24 22:55:40,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:55:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-24 22:55:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 22:55:40,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:40,239 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 22:55:40,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:55:40,239 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash 480988371, now seen corresponding path program 4 times [2020-09-24 22:55:40,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:40,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821343183] [2020-09-24 22:55:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 22:55:42,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:42,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1808 [2020-09-24 22:55:42,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 22:55:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 22:55:42,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:42,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:42,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:55:42,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:42,199 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 22:55:42,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821343183] [2020-09-24 22:55:42,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:42,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:55:42,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750851269] [2020-09-24 22:55:42,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:55:42,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:55:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:55:42,202 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-24 22:55:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:42,517 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-09-24 22:55:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 22:55:42,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-24 22:55:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:42,519 INFO L225 Difference]: With dead ends: 156 [2020-09-24 22:55:42,520 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 22:55:42,521 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 22:55:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 22:55:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-24 22:55:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 22:55:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-24 22:55:42,529 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-24 22:55:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:42,529 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-24 22:55:42,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:55:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-24 22:55:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 22:55:42,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:42,531 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 22:55:42,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:55:42,531 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash 662336473, now seen corresponding path program 5 times [2020-09-24 22:55:42,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:42,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524319145] [2020-09-24 22:55:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 22:55:42,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-24 22:55:42,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 22:55:42,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 22:55:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:42,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:42,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 22:55:42,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:42,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:42,820 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 22:55:42,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524319145] [2020-09-24 22:55:42,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:42,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:55:42,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404457057] [2020-09-24 22:55:42,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:55:42,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:42,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:55:42,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:55:42,825 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-24 22:55:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:43,044 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-24 22:55:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:55:43,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-24 22:55:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:43,047 INFO L225 Difference]: With dead ends: 203 [2020-09-24 22:55:43,047 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 22:55:43,048 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 22:55:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 22:55:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-24 22:55:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 22:55:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 22:55:43,071 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-24 22:55:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:43,072 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 22:55:43,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:55:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 22:55:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 22:55:43,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:43,076 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 22:55:43,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:55:43,077 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1088777214, now seen corresponding path program 6 times [2020-09-24 22:55:43,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:43,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584487901] [2020-09-24 22:55:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:43,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 22:55:43,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:43,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-09-24 22:55:43,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:43,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 22:55:43,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 22:55:43,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:43,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:43,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:43,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:43,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:55:43,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:43,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:43,546 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 22:55:43,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584487901] [2020-09-24 22:55:43,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:43,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:55:43,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196921088] [2020-09-24 22:55:43,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:55:43,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:43,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:55:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:55:43,550 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-24 22:55:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:43,827 INFO L93 Difference]: Finished difference Result 210 states and 220 transitions. [2020-09-24 22:55:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 22:55:43,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-24 22:55:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:43,830 INFO L225 Difference]: With dead ends: 210 [2020-09-24 22:55:43,831 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 22:55:43,832 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 22:55:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 22:55:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-24 22:55:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 22:55:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-24 22:55:43,851 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-24 22:55:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:43,852 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-24 22:55:43,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:55:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-24 22:55:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 22:55:43,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:43,854 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 22:55:43,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:55:43,855 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1019285447, now seen corresponding path program 7 times [2020-09-24 22:55:43,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:43,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856722889] [2020-09-24 22:55:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:44,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 22:55:44,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:44,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-09-24 22:55:44,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:44,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:44,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 22:55:44,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 22:55:44,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:44,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:44,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:44,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:44,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:44,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:55:44,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:44,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:44,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:44,486 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 22:55:44,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856722889] [2020-09-24 22:55:44,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:44,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:55:44,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927342749] [2020-09-24 22:55:44,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:55:44,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:44,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:55:44,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:55:44,495 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-24 22:55:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:44,742 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-09-24 22:55:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:55:44,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-24 22:55:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:44,744 INFO L225 Difference]: With dead ends: 217 [2020-09-24 22:55:44,744 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 22:55:44,745 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 22:55:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 22:55:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-24 22:55:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 22:55:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-24 22:55:44,752 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-24 22:55:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:44,754 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-24 22:55:44,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:55:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-24 22:55:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 22:55:44,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:44,755 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 22:55:44,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:55:44,756 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1496431714, now seen corresponding path program 8 times [2020-09-24 22:55:44,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:44,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073583488] [2020-09-24 22:55:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 22:55:45,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:45,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-09-24 22:55:45,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:45,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 22:55:45,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 22:55:45,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:45,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:45,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:45,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:55:45,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:45,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:55:45,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:45,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:45,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:45,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:45,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:45,472 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 22:55:45,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073583488] [2020-09-24 22:55:45,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:45,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:55:45,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815133291] [2020-09-24 22:55:45,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:55:45,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:45,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:55:45,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:55:45,476 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-24 22:55:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:45,908 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2020-09-24 22:55:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 22:55:45,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-24 22:55:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:45,911 INFO L225 Difference]: With dead ends: 219 [2020-09-24 22:55:45,911 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 22:55:45,912 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 22:55:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 22:55:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-24 22:55:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 22:55:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-24 22:55:45,924 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-24 22:55:45,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:45,924 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-24 22:55:45,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:55:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-24 22:55:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 22:55:45,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:45,929 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 22:55:45,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 22:55:45,930 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:45,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-24 22:55:45,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:45,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101070163] [2020-09-24 22:55:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 22:55:45,968 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 22:55:45,968 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 22:55:45,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 22:55:46,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:55:46 BoogieIcfgContainer [2020-09-24 22:55:46,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:55:46,048 INFO L168 Benchmark]: Toolchain (without parser) took 12841.67 ms. Allocated memory was 138.9 MB in the beginning and 309.3 MB in the end (delta: 170.4 MB). Free memory was 102.3 MB in the beginning and 105.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 166.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,052 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:55:46,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.99 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,054 INFO L168 Benchmark]: Boogie Preprocessor took 169.98 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.0 MB in the beginning and 179.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,058 INFO L168 Benchmark]: RCFGBuilder took 591.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 154.9 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,063 INFO L168 Benchmark]: TraceAbstraction took 11718.75 ms. Allocated memory was 202.4 MB in the beginning and 309.3 MB in the end (delta: 107.0 MB). Free memory was 154.2 MB in the beginning and 105.9 MB in the end (delta: 48.3 MB). Peak memory consumption was 155.2 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:46,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 345.99 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.98 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.0 MB in the beginning and 179.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 591.81 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 154.9 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11718.75 ms. Allocated memory was 202.4 MB in the beginning and 309.3 MB in the end (delta: 107.0 MB). Free memory was 154.2 MB in the beginning and 105.9 MB in the end (delta: 48.3 MB). Peak memory consumption was 155.2 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)<