/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 00:12:08,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 00:12:08,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 00:12:08,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 00:12:08,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 00:12:08,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 00:12:08,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 00:12:08,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 00:12:08,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 00:12:08,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 00:12:08,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 00:12:08,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 00:12:08,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 00:12:08,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 00:12:08,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 00:12:08,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 00:12:08,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 00:12:08,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 00:12:08,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 00:12:08,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 00:12:08,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 00:12:08,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 00:12:08,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 00:12:08,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 00:12:08,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 00:12:08,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 00:12:08,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 00:12:08,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 00:12:08,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 00:12:08,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 00:12:08,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 00:12:08,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 00:12:08,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 00:12:08,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 00:12:08,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 00:12:08,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 00:12:08,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 00:12:08,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 00:12:08,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 00:12:08,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 00:12:08,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 00:12:08,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 00:12:08,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 00:12:08,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 00:12:08,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 00:12:08,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 00:12:08,472 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 00:12:08,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 00:12:08,473 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 00:12:08,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 00:12:08,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 00:12:08,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 00:12:08,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 00:12:08,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 00:12:08,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 00:12:08,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 00:12:08,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 00:12:08,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 00:12:08,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 00:12:08,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 00:12:08,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 00:12:08,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 00:12:08,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 00:12:08,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:12:08,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 00:12:08,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 00:12:08,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 00:12:08,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 00:12:08,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 00:12:08,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 00:12:08,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 00:12:08,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 00:12:08,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 00:12:08,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 00:12:08,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 00:12:08,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 00:12:08,878 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 00:12:08,878 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-10-14 00:12:08,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56268eadd/c64cd7faa95243898afa70b0e85b385a/FLAG339ecc251 [2020-10-14 00:12:09,380 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 00:12:09,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2020-10-14 00:12:09,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56268eadd/c64cd7faa95243898afa70b0e85b385a/FLAG339ecc251 [2020-10-14 00:12:09,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56268eadd/c64cd7faa95243898afa70b0e85b385a [2020-10-14 00:12:09,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 00:12:09,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 00:12:09,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 00:12:09,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 00:12:09,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 00:12:09,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:12:09" (1/1) ... [2020-10-14 00:12:09,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e0ef97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:09, skipping insertion in model container [2020-10-14 00:12:09,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:12:09" (1/1) ... [2020-10-14 00:12:09,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 00:12:09,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 00:12:09,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:12:10,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 00:12:10,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:12:10,045 INFO L208 MainTranslator]: Completed translation [2020-10-14 00:12:10,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10 WrapperNode [2020-10-14 00:12:10,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 00:12:10,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 00:12:10,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 00:12:10,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 00:12:10,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... [2020-10-14 00:12:10,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 00:12:10,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 00:12:10,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 00:12:10,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 00:12:10,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:12:10,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 00:12:10,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 00:12:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 00:12:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 00:12:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 00:12:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 00:12:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 00:12:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 00:12:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 00:12:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 00:12:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 00:12:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 00:12:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 00:12:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 00:12:10,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 00:12:10,602 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 00:12:10,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:12:10 BoogieIcfgContainer [2020-10-14 00:12:10,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 00:12:10,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 00:12:10,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 00:12:10,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 00:12:10,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:12:09" (1/3) ... [2020-10-14 00:12:10,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7e0a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:12:10, skipping insertion in model container [2020-10-14 00:12:10,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:12:10" (2/3) ... [2020-10-14 00:12:10,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7e0a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:12:10, skipping insertion in model container [2020-10-14 00:12:10,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:12:10" (3/3) ... [2020-10-14 00:12:10,616 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2020-10-14 00:12:10,630 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 00:12:10,640 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 00:12:10,658 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 00:12:10,688 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 00:12:10,688 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 00:12:10,688 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 00:12:10,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 00:12:10,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 00:12:10,689 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 00:12:10,689 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 00:12:10,689 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 00:12:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 00:12:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 00:12:10,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:10,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:10,721 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1522547275, now seen corresponding path program 1 times [2020-10-14 00:12:10,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:10,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771846126] [2020-10-14 00:12:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:10,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:11,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 00:12:11,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:11,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-14 00:12:11,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:11,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 00:12:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:11,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 00:12:11,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:11,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:11,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:11,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 00:12:11,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:11,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:11,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:12:11,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771846126] [2020-10-14 00:12:11,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:12:11,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 00:12:11,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652298293] [2020-10-14 00:12:11,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 00:12:11,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:11,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 00:12:11,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:12:11,294 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-14 00:12:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:11,374 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-14 00:12:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 00:12:11,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 00:12:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:11,386 INFO L225 Difference]: With dead ends: 36 [2020-10-14 00:12:11,386 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 00:12:11,390 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 [2020-10-14 00:12:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 00:12:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 00:12:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 00:12:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 00:12:11,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-14 00:12:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:11,429 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 00:12:11,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 00:12:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 00:12:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 00:12:11,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:11,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:11,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 00:12:11,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1742365231, now seen corresponding path program 1 times [2020-10-14 00:12:11,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:11,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498285648] [2020-10-14 00:12:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:11,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 00:12:11,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:11,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-14 00:12:11,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:11,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:12:11,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:12:11,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:12:11,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:12:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:11,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:11,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:11,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 00:12:11,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:11,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:11,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:11,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:11,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:11,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:12:11,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498285648] [2020-10-14 00:12:11,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:12:11,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 00:12:11,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717162585] [2020-10-14 00:12:11,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:12:11,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:12:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:12:11,699 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 00:12:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:11,749 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-14 00:12:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 00:12:11,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-14 00:12:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:11,753 INFO L225 Difference]: With dead ends: 26 [2020-10-14 00:12:11,753 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 00:12:11,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:12:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 00:12:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-10-14 00:12:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 00:12:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-14 00:12:11,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-14 00:12:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:11,762 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-14 00:12:11,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:12:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-14 00:12:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:12:11,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:11,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:11,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 00:12:11,764 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash 351378381, now seen corresponding path program 1 times [2020-10-14 00:12:11,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:11,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586144946] [2020-10-14 00:12:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:11,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:11,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:12:11,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:11,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-14 00:12:11,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:11,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:12:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 00:12:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 00:12:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:12,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:12,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:12:12,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:12,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:12,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:12,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 00:12:12,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586144946] [2020-10-14 00:12:12,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:12:12,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 00:12:12,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039604553] [2020-10-14 00:12:12,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:12:12,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:12:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:12:12,049 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-14 00:12:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:12,141 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-14 00:12:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 00:12:12,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-14 00:12:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:12,142 INFO L225 Difference]: With dead ends: 23 [2020-10-14 00:12:12,142 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 00:12:12,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:12:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 00:12:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 00:12:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 00:12:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 00:12:12,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-14 00:12:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:12,149 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 00:12:12,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:12:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 00:12:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 00:12:12,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:12,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:12,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 00:12:12,151 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1956634319, now seen corresponding path program 1 times [2020-10-14 00:12:12,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:12,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580952044] [2020-10-14 00:12:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:12,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:12,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:12,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 00:12:12,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-14 00:12:12,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:12,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 00:12:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:12:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 00:12:12,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:12,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:12,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:12,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:12,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:12,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:12:12,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:12,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:12,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 00:12:12,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580952044] [2020-10-14 00:12:12,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:12,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 00:12:12,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609344229] [2020-10-14 00:12:12,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 00:12:12,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 00:12:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:12:12,530 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 00:12:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:12,615 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-14 00:12:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 00:12:12,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 00:12:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:12,617 INFO L225 Difference]: With dead ends: 28 [2020-10-14 00:12:12,617 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 00:12:12,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:12:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 00:12:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 00:12:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 00:12:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 00:12:12,623 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-14 00:12:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:12,623 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 00:12:12,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 00:12:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 00:12:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 00:12:12,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:12,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:12,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 00:12:12,625 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1293556435, now seen corresponding path program 2 times [2020-10-14 00:12:12,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:12,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7171409] [2020-10-14 00:12:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:12,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:12,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:12,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:12,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 00:12:12,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:12,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-14 00:12:12,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:12,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:12,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:12:12,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 00:12:12,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 00:12:12,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:13,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:13,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:13,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:13,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:13,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 00:12:13,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:13,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 00:12:13,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7171409] [2020-10-14 00:12:13,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:13,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:12:13,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629606705] [2020-10-14 00:12:13,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:12:13,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:13,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:12:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:12:13,077 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-10-14 00:12:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:13,187 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-14 00:12:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:12:13,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 00:12:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:13,188 INFO L225 Difference]: With dead ends: 25 [2020-10-14 00:12:13,188 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 00:12:13,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:12:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 00:12:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 00:12:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 00:12:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 00:12:13,198 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-14 00:12:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:13,198 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 00:12:13,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:12:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 00:12:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 00:12:13,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:13,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:13,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 00:12:13,201 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1481081579, now seen corresponding path program 3 times [2020-10-14 00:12:13,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:13,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371527469] [2020-10-14 00:12:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:13,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:13,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:13,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 00:12:13,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-14 00:12:13,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:13,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:12:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:12:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 00:12:13,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:13,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:13,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:13,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:13,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:13,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:13,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:12:13,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:13,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:13,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:13,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 00:12:13,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371527469] [2020-10-14 00:12:13,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:13,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:12:13,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271515548] [2020-10-14 00:12:13,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:12:13,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:12:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:12:13,744 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-14 00:12:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:13,802 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-14 00:12:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 00:12:13,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-14 00:12:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:13,803 INFO L225 Difference]: With dead ends: 32 [2020-10-14 00:12:13,803 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 00:12:13,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:12:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 00:12:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-14 00:12:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 00:12:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-14 00:12:13,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-14 00:12:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:13,810 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-14 00:12:13,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:12:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-14 00:12:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 00:12:13,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:13,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:13,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 00:12:13,812 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:13,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2123854327, now seen corresponding path program 4 times [2020-10-14 00:12:13,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:13,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901390050] [2020-10-14 00:12:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:13,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:14,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:14,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 00:12:14,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:14,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-14 00:12:14,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:14,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:12:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 00:12:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 00:12:14,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:14,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:14,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:14,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:12:14,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:14,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:14,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 00:12:14,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901390050] [2020-10-14 00:12:14,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:14,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:12:14,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605898693] [2020-10-14 00:12:14,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:12:14,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:12:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:12:14,417 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-10-14 00:12:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:14,543 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-14 00:12:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 00:12:14,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-14 00:12:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:14,545 INFO L225 Difference]: With dead ends: 28 [2020-10-14 00:12:14,545 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 00:12:14,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:12:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 00:12:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 00:12:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 00:12:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-14 00:12:14,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-14 00:12:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:14,552 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-14 00:12:14,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:12:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-14 00:12:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 00:12:14,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:14,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:14,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 00:12:14,554 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1379436939, now seen corresponding path program 5 times [2020-10-14 00:12:14,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:14,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356438587] [2020-10-14 00:12:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:14,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:19,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:19,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 00:12:19,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 00:12:19,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:19,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:12:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 00:12:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 00:12:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:19,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:19,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:19,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:19,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:12:19,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:19,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:19,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:19,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 00:12:19,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356438587] [2020-10-14 00:12:19,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:19,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:12:19,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623888738] [2020-10-14 00:12:19,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:12:19,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:19,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:12:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:12:19,703 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-14 00:12:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:19,846 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-14 00:12:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:12:19,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 00:12:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:19,850 INFO L225 Difference]: With dead ends: 29 [2020-10-14 00:12:19,850 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 00:12:19,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:12:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 00:12:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 00:12:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 00:12:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-14 00:12:19,860 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2020-10-14 00:12:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:19,860 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-14 00:12:19,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:12:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-14 00:12:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 00:12:19,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:19,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:19,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 00:12:19,862 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash 222665609, now seen corresponding path program 6 times [2020-10-14 00:12:19,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:19,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206723573] [2020-10-14 00:12:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:29,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:29,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 00:12:29,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:29,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9382 [2020-10-14 00:12:29,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:29,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:29,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:12:29,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 00:12:29,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 00:12:29,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:12:29,509 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-10-14 00:12:29,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:29,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:29,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:29,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:29,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:29,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:12:29,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:29,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:29,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:29,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 00:12:29,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206723573] [2020-10-14 00:12:29,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:29,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:12:29,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877588347] [2020-10-14 00:12:29,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:12:29,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:29,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:12:29,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:12:29,605 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-14 00:12:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:29,758 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-10-14 00:12:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 00:12:29,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-14 00:12:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:29,761 INFO L225 Difference]: With dead ends: 30 [2020-10-14 00:12:29,761 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 00:12:29,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:12:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 00:12:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 00:12:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 00:12:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-14 00:12:29,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-10-14 00:12:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:29,771 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-14 00:12:29,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:12:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-14 00:12:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 00:12:29,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:29,773 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:29,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 00:12:29,773 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1651762955, now seen corresponding path program 7 times [2020-10-14 00:12:29,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:29,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528939680] [2020-10-14 00:12:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:29,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:53,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:53,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 00:12:53,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:12:53,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23214 [2020-10-14 00:12:53,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:53,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:12:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:12:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 00:12:53,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:12:53,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:12:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:53,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:12:53,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:12:53,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:12:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:12:53,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:12:53,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:12:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:12:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:12:53,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:12:53,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:12:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 00:12:53,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528939680] [2020-10-14 00:12:53,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:12:53,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:12:53,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589001747] [2020-10-14 00:12:53,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:12:53,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:12:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:12:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:12:53,050 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-10-14 00:12:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:12:53,119 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-14 00:12:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:12:53,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 00:12:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:12:53,120 INFO L225 Difference]: With dead ends: 40 [2020-10-14 00:12:53,120 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 00:12:53,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:12:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 00:12:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 00:12:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 00:12:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-14 00:12:53,129 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-14 00:12:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:12:53,129 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-14 00:12:53,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:12:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-14 00:12:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 00:12:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:12:53,131 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:12:53,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 00:12:53,132 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:12:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:12:53,133 INFO L82 PathProgramCache]: Analyzing trace with hash -108310377, now seen corresponding path program 8 times [2020-10-14 00:12:53,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:12:53,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643263302] [2020-10-14 00:12:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:12:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:12:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:12:55,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking...