/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:33:42,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:33:42,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:33:42,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:33:42,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:33:42,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:33:42,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:33:42,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:33:42,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:33:42,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:33:42,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:33:42,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:33:42,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:33:42,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:33:42,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:33:42,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:33:42,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:33:42,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:33:42,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:33:42,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:33:42,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:33:42,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:33:42,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:33:42,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:33:42,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:33:42,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:33:42,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:33:42,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:33:42,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:33:42,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:33:42,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:33:42,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:33:42,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:33:42,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:33:42,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:33:42,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:33:42,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:33:42,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:33:42,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:33:42,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:33:42,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:33:42,354 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 19:33:42,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:33:42,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:33:42,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:33:42,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:33:42,402 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:33:42,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:33:42,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:33:42,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:33:42,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:33:42,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:33:42,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:33:42,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:33:42,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:33:42,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:33:42,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:33:42,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:33:42,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:33:42,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:33:42,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:33:42,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:33:42,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:33:42,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:33:42,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:33:42,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:33:42,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:33:42,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:33:42,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:33:42,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:33:42,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:33:42,409 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:33:42,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:33:42,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:33:42,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:33:42,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:33:42,977 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:33:42,979 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-24 19:33:43,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a30a91bc7/db9034ad57b9425980d3bffaf201a0d4/FLAG3fd5e3f03 [2020-09-24 19:33:43,660 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:33:43,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-24 19:33:43,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a30a91bc7/db9034ad57b9425980d3bffaf201a0d4/FLAG3fd5e3f03 [2020-09-24 19:33:43,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a30a91bc7/db9034ad57b9425980d3bffaf201a0d4 [2020-09-24 19:33:44,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:33:44,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:33:44,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:44,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:33:44,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:33:44,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:43" (1/1) ... [2020-09-24 19:33:44,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad15a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44, skipping insertion in model container [2020-09-24 19:33:44,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:43" (1/1) ... [2020-09-24 19:33:44,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:33:44,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:33:44,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:44,373 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:33:44,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:44,433 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:33:44,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44 WrapperNode [2020-09-24 19:33:44,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:44,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:33:44,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:33:44,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:33:44,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (1/1) ... [2020-09-24 19:33:44,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:33:44,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:33:44,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:33:44,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:33:44,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (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 19:33:44,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:33:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:33:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:33:44,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:33:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:33:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:33:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:33:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:33:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 19:33:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:33:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:33:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:33:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:33:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:33:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:33:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:33:45,081 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:33:45,081 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 19:33:45,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:45 BoogieIcfgContainer [2020-09-24 19:33:45,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:33:45,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:33:45,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:33:45,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:33:45,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:33:43" (1/3) ... [2020-09-24 19:33:45,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b15f353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:45, skipping insertion in model container [2020-09-24 19:33:45,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:44" (2/3) ... [2020-09-24 19:33:45,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b15f353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:45, skipping insertion in model container [2020-09-24 19:33:45,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:45" (3/3) ... [2020-09-24 19:33:45,097 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-24 19:33:45,109 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:33:45,119 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:33:45,142 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:33:45,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:33:45,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:33:45,171 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:33:45,171 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:33:45,171 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:33:45,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:33:45,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:33:45,172 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:33:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-24 19:33:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:33:45,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:45,205 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] [2020-09-24 19:33:45,206 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-24 19:33:45,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:45,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122153310] [2020-09-24 19:33:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:45,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:45,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:46,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:46,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 19:33:46,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:46,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-09-24 19:33:46,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 19:33:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:46,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:33:46,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:46,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:46,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:33:46,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:46,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:46,234 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 19:33:46,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122153310] [2020-09-24 19:33:46,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:46,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:33:46,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522494830] [2020-09-24 19:33:46,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:33:46,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:33:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:33:46,267 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-24 19:33:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:46,473 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-24 19:33:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:33:46,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 19:33:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:46,487 INFO L225 Difference]: With dead ends: 121 [2020-09-24 19:33:46,487 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 19:33:46,492 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 19:33:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 19:33:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-24 19:33:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 19:33:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-24 19:33:46,540 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-24 19:33:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:46,541 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-24 19:33:46,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:33:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-24 19:33:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:33:46,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:46,543 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] [2020-09-24 19:33:46,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:33:46,544 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-24 19:33:46,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:46,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705561280] [2020-09-24 19:33:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:46,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:46,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:47,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:47,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 19:33:47,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:47,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-09-24 19:33:47,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:47,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:33:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:33:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 19:33:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:47,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:47,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:47,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:47,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:47,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:47,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:47,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:47,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:47,064 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 19:33:47,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705561280] [2020-09-24 19:33:47,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:47,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:33:47,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085316037] [2020-09-24 19:33:47,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:33:47,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:33:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:47,069 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-24 19:33:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:47,263 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-24 19:33:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:33:47,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 19:33:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:47,268 INFO L225 Difference]: With dead ends: 95 [2020-09-24 19:33:47,268 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 19:33:47,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:33:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 19:33:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-24 19:33:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 19:33:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 19:33:47,287 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-24 19:33:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:47,287 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 19:33:47,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:33:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 19:33:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 19:33:47,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:47,290 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 19:33:47,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:33:47,290 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-24 19:33:47,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:47,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522424048] [2020-09-24 19:33:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:47,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:47,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:47,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:48,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:48,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 19:33:48,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:33:48,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-09-24 19:33:48,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:33:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:33:48,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:33:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:48,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:48,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:48,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:48,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:48,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:48,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:48,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:48,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:48,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:33:48,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522424048] [2020-09-24 19:33:48,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:48,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:33:48,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020819210] [2020-09-24 19:33:48,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:33:48,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:33:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:48,481 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2020-09-24 19:33:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:48,658 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-09-24 19:33:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:33:48,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-24 19:33:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:48,660 INFO L225 Difference]: With dead ends: 102 [2020-09-24 19:33:48,660 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 19:33:48,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:33:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 19:33:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-09-24 19:33:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 19:33:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-24 19:33:48,670 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-24 19:33:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:48,670 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-24 19:33:48,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:33:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-24 19:33:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 19:33:48,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:48,673 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] [2020-09-24 19:33:48,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:33:48,673 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-24 19:33:48,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:48,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708415040] [2020-09-24 19:33:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:49,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:49,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:49,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 19:33:49,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-24 19:33:49,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 19:33:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 19:33:49,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:33:49,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:50,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:50,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:50,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:50,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:50,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:50,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:50,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708415040] [2020-09-24 19:33:50,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:50,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 19:33:50,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008024334] [2020-09-24 19:33:50,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 19:33:50,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 19:33:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:33:50,065 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-24 19:33:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:51,188 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-24 19:33:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 19:33:51,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-24 19:33:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:51,191 INFO L225 Difference]: With dead ends: 164 [2020-09-24 19:33:51,191 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 19:33:51,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 19:33:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 19:33:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2020-09-24 19:33:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 19:33:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-24 19:33:51,224 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-24 19:33:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:51,227 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-24 19:33:51,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 19:33:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-24 19:33:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 19:33:51,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:51,231 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] [2020-09-24 19:33:51,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:33:51,234 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-24 19:33:51,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:51,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737700189] [2020-09-24 19:33:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:51,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:52,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:52,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:33:52,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:33:52,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-24 19:33:52,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:33:52,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:33:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:52,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:52,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:52,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:52,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:52,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:52,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:52,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:52,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737700189] [2020-09-24 19:33:52,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:52,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:33:52,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797950531] [2020-09-24 19:33:52,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:33:52,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:33:52,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:33:52,382 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 8 states. [2020-09-24 19:33:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:52,705 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-24 19:33:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 19:33:52,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-24 19:33:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:52,710 INFO L225 Difference]: With dead ends: 166 [2020-09-24 19:33:52,711 INFO L226 Difference]: Without dead ends: 146 [2020-09-24 19:33:52,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:33:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-24 19:33:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-24 19:33:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 19:33:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-24 19:33:52,724 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 55 [2020-09-24 19:33:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:52,724 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-24 19:33:52,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:33:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-24 19:33:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 19:33:52,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:52,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-09-24 19:33:52,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:33:52,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:52,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-24 19:33:52,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:52,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159784200] [2020-09-24 19:33:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:52,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:52,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:53,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:53,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:53,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 19:33:53,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:33:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-09-24 19:33:53,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:33:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:33:53,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:53,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:53,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:53,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:53,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:53,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:53,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:53,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:53,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:53,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159784200] [2020-09-24 19:33:53,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:53,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:33:53,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255255732] [2020-09-24 19:33:53,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:33:53,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:33:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:33:53,939 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-24 19:33:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:54,340 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2020-09-24 19:33:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 19:33:54,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-24 19:33:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:54,343 INFO L225 Difference]: With dead ends: 165 [2020-09-24 19:33:54,343 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 19:33:54,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:33:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 19:33:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2020-09-24 19:33:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 19:33:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-24 19:33:54,370 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 58 [2020-09-24 19:33:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:54,371 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-24 19:33:54,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:33:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-24 19:33:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 19:33:54,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:54,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:54,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:33:54,380 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-24 19:33:54,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:54,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104604985] [2020-09-24 19:33:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:54,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 19:33:55,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:55,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:33:55,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:33:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 19:33:55,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:55,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:55,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:55,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:55,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:55,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 19:33:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:55,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:55,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:55,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:55,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 19:33:55,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:55,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:33:55,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:55,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:33:55,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:33:55,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104604985] [2020-09-24 19:33:55,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:55,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:33:55,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912623651] [2020-09-24 19:33:55,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:33:55,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:55,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:33:55,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:33:55,554 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 10 states. [2020-09-24 19:33:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:55,857 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-24 19:33:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:33:55,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-24 19:33:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:55,858 INFO L225 Difference]: With dead ends: 143 [2020-09-24 19:33:55,859 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 19:33:55,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:33:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 19:33:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-09-24 19:33:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 19:33:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 19:33:55,872 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 64 [2020-09-24 19:33:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:55,873 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 19:33:55,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:33:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 19:33:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 19:33:55,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:55,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 19:33:55,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:33:55,877 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-24 19:33:55,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:55,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666402090] [2020-09-24 19:33:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:55,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:57,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:33:57,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1134 [2020-09-24 19:33:57,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 19:33:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:33:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 19:33:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:57,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:57,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:57,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:57,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:33:57,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:57,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:57,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:57,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:57,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666402090] [2020-09-24 19:33:57,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:57,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 19:33:57,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182711621] [2020-09-24 19:33:57,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 19:33:57,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 19:33:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-09-24 19:33:57,583 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-09-24 19:33:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:59,229 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2020-09-24 19:33:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 19:33:59,230 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-09-24 19:33:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:59,233 INFO L225 Difference]: With dead ends: 191 [2020-09-24 19:33:59,233 INFO L226 Difference]: Without dead ends: 189 [2020-09-24 19:33:59,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 19:33:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-24 19:33:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2020-09-24 19:33:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-24 19:33:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-24 19:33:59,246 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 65 [2020-09-24 19:33:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:59,246 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-24 19:33:59,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 19:33:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-24 19:33:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 19:33:59,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:59,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2020-09-24 19:33:59,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:33:59,249 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:59,249 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 5 times [2020-09-24 19:33:59,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:59,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256079765] [2020-09-24 19:33:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:00,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:00,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 19:34:00,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:34:00,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:34:00,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:00,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:34:00,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:34:00,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 19:34:00,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:00,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:00,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:00,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:00,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:00,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:00,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:34:00,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:00,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:00,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256079765] [2020-09-24 19:34:00,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:34:00,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:34:00,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129715892] [2020-09-24 19:34:00,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:34:00,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:34:00,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:34:00,402 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 11 states. [2020-09-24 19:34:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:00,829 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-09-24 19:34:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 19:34:00,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-24 19:34:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:00,831 INFO L225 Difference]: With dead ends: 193 [2020-09-24 19:34:00,831 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 19:34:00,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-24 19:34:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 19:34:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2020-09-24 19:34:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 19:34:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-24 19:34:00,842 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 72 [2020-09-24 19:34:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:00,843 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-24 19:34:00,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:34:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-24 19:34:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 19:34:00,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:00,845 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 19:34:00,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:34:00,845 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:00,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 6 times [2020-09-24 19:34:00,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:00,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516439270] [2020-09-24 19:34:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:00,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:01,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:01,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:02,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:02,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 19:34:02,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:34:02,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-09-24 19:34:02,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:34:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:34:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:34:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:02,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:02,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:02,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:02,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:02,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:02,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:02,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:02,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516439270] [2020-09-24 19:34:02,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:34:02,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 19:34:02,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039101240] [2020-09-24 19:34:02,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 19:34:02,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:02,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 19:34:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:34:02,206 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 12 states. [2020-09-24 19:34:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:02,558 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2020-09-24 19:34:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 19:34:02,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-24 19:34:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:02,560 INFO L225 Difference]: With dead ends: 192 [2020-09-24 19:34:02,560 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 19:34:02,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-09-24 19:34:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 19:34:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 127. [2020-09-24 19:34:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 19:34:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-09-24 19:34:02,574 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2020-09-24 19:34:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:02,574 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-09-24 19:34:02,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 19:34:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-09-24 19:34:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 19:34:02,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:02,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 19:34:02,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:34:02,582 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 2 times [2020-09-24 19:34:02,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:02,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603773512] [2020-09-24 19:34:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:34:02,612 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:34:02,612 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:34:02,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:34:02,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:34:02 BoogieIcfgContainer [2020-09-24 19:34:02,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:34:02,651 INFO L168 Benchmark]: Toolchain (without parser) took 18635.48 ms. Allocated memory was 141.6 MB in the beginning and 339.2 MB in the end (delta: 197.7 MB). Free memory was 104.7 MB in the beginning and 128.7 MB in the end (delta: -24.0 MB). Peak memory consumption was 173.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:02,652 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:34:02,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.91 ms. Allocated memory is still 141.6 MB. Free memory was 104.1 MB in the beginning and 93.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:02,656 INFO L168 Benchmark]: Boogie Preprocessor took 184.32 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:02,659 INFO L168 Benchmark]: RCFGBuilder took 467.77 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 162.5 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:02,660 INFO L168 Benchmark]: TraceAbstraction took 17558.65 ms. Allocated memory was 203.9 MB in the beginning and 339.2 MB in the end (delta: 135.3 MB). Free memory was 161.8 MB in the beginning and 128.7 MB in the end (delta: 33.1 MB). Peak memory consumption was 168.4 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:02,669 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 410.91 ms. Allocated memory is still 141.6 MB. Free memory was 104.1 MB in the beginning and 93.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 184.32 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 467.77 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 162.5 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17558.65 ms. Allocated memory was 203.9 MB in the beginning and 339.2 MB in the end (delta: 135.3 MB). Free memory was 161.8 MB in the beginning and 128.7 MB in the end (delta: 33.1 MB). Peak memory consumption was 168.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i