/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/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:34:05,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:34:05,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:34:05,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:34:05,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:34:05,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:34:05,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:34:05,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:34:05,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:34:05,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:34:05,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:34:05,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:34:05,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:34:05,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:34:05,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:34:05,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:34:05,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:34:05,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:34:05,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:34:05,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:34:05,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:34:05,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:34:05,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:34:05,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:34:05,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:34:05,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:34:05,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:34:05,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:34:05,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:34:05,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:34:05,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:34:05,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:34:05,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:34:05,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:34:05,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:34:05,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:34:05,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:34:05,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:34:05,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:34:05,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:34:05,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:34:05,497 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 19:34:05,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:34:05,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:34:05,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:34:05,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:34:05,560 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:34:05,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:34:05,563 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:34:05,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:34:05,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:34:05,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:34:05,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:34:05,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:34:05,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:34:05,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:34:05,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:34:05,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:34:05,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:34:05,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:34:05,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:34:05,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:34:05,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:34:05,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:34:05,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:34:05,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:34:05,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:34:05,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:34:05,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:34:05,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:34:05,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:34:05,570 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 19:34:06,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:34:06,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:34:06,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:34:06,160 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:34:06,160 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:34:06,162 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 19:34:06,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76f5544f8/73b5bf1635634019a0e3e7f2539faafe/FLAGc53a79a97 [2020-09-24 19:34:06,862 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:34:06,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 19:34:06,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76f5544f8/73b5bf1635634019a0e3e7f2539faafe/FLAGc53a79a97 [2020-09-24 19:34:07,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76f5544f8/73b5bf1635634019a0e3e7f2539faafe [2020-09-24 19:34:07,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:34:07,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:34:07,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:34:07,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:34:07,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:34:07,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e89ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07, skipping insertion in model container [2020-09-24 19:34:07,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:34:07,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:34:07,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:34:07,470 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:34:07,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:34:07,624 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:34:07,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07 WrapperNode [2020-09-24 19:34:07,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:34:07,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:34:07,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:34:07,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:34:07,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (1/1) ... [2020-09-24 19:34:07,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:34:07,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:34:07,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:34:07,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:34:07,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (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 19:34:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:34:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:34:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:34:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-24 19:34:07,797 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-24 19:34:07,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:34:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:34:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:34:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-24 19:34:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-24 19:34:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-24 19:34:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-24 19:34:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-24 19:34:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-24 19:34:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-24 19:34:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-24 19:34:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-24 19:34:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-24 19:34:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-24 19:34:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-24 19:34:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-24 19:34:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-24 19:34:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-24 19:34:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-24 19:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-24 19:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-24 19:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-24 19:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-24 19:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-24 19:34:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-24 19:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-24 19:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-24 19:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-24 19:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-24 19:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:34:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:34:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:34:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:34:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:34:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:34:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:34:08,266 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:34:08,266 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 19:34:08,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:34:08 BoogieIcfgContainer [2020-09-24 19:34:08,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:34:08,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:34:08,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:34:08,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:34:08,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:34:07" (1/3) ... [2020-09-24 19:34:08,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfd50f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:34:08, skipping insertion in model container [2020-09-24 19:34:08,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:34:07" (2/3) ... [2020-09-24 19:34:08,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfd50f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:34:08, skipping insertion in model container [2020-09-24 19:34:08,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:34:08" (3/3) ... [2020-09-24 19:34:08,284 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 19:34:08,296 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:34:08,307 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:34:08,330 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:34:08,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:34:08,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:34:08,393 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:34:08,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:34:08,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:34:08,394 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:34:08,394 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:34:08,394 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:34:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-09-24 19:34:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 19:34:08,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:08,436 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 19:34:08,436 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-09-24 19:34:08,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:08,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843248499] [2020-09-24 19:34:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:08,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:08,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:09,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:09,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:09,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:09,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 19:34:09,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:34:09,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-24 19:34:09,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 19:34:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:09,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:34:09,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:09,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:09,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:09,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:09,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:34:09,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:09,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:09,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:09,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:09,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 19:34:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:09,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:09,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:09,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:09,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:34:09,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:09,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:09,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:09,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:09,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:09,772 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 19:34:09,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843248499] [2020-09-24 19:34:09,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:09,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:34:09,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022146682] [2020-09-24 19:34:09,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:34:09,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:34:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:34:09,812 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-09-24 19:34:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:10,126 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-09-24 19:34:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:34:10,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-09-24 19:34:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:10,141 INFO L225 Difference]: With dead ends: 227 [2020-09-24 19:34:10,142 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 19:34:10,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 19:34:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 19:34:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-09-24 19:34:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 19:34:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-09-24 19:34:10,199 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-09-24 19:34:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:10,200 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-09-24 19:34:10,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:34:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-09-24 19:34:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 19:34:10,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:10,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:10,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:34:10,204 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:10,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-09-24 19:34:10,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:10,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921837900] [2020-09-24 19:34:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:10,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:10,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:10,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:11,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:11,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:34:11,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:34:11,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-24 19:34:11,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:11,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:34:11,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 19:34:11,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 19:34:11,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:11,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:11,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:11,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:11,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:11,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:11,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 19:34:11,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:11,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:11,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:11,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 19:34:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:11,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:11,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:11,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:11,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:34:11,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:11,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:11,365 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 19:34:11,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921837900] [2020-09-24 19:34:11,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:11,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:34:11,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483430151] [2020-09-24 19:34:11,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:34:11,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:34:11,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:34:11,373 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-09-24 19:34:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:11,622 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-09-24 19:34:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:34:11,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-09-24 19:34:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:11,628 INFO L225 Difference]: With dead ends: 189 [2020-09-24 19:34:11,628 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 19:34:11,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:34:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 19:34:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-24 19:34:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 19:34:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-09-24 19:34:11,655 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-09-24 19:34:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:11,655 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-09-24 19:34:11,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:34:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-09-24 19:34:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 19:34:11,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:11,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:11,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:34:11,664 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:11,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-09-24 19:34:11,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:11,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637978513] [2020-09-24 19:34:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:11,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:11,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:12,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:12,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:12,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 19:34:12,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:34:12,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:34:12,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:34:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 19:34:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 19:34:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:12,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:12,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:12,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:12,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:12,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:12,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:12,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:12,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:12,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:12,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-09-24 19:34:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 19:34:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:12,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:12,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:12,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:12,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:12,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:34:12,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:34:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:34:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:12,885 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 19:34:12,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637978513] [2020-09-24 19:34:12,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:12,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:34:12,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241711167] [2020-09-24 19:34:12,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:34:12,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:12,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:34:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:34:12,888 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-09-24 19:34:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:13,433 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2020-09-24 19:34:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:34:13,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 19:34:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:13,443 INFO L225 Difference]: With dead ends: 193 [2020-09-24 19:34:13,444 INFO L226 Difference]: Without dead ends: 191 [2020-09-24 19:34:13,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:34:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-24 19:34:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 160. [2020-09-24 19:34:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-24 19:34:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2020-09-24 19:34:13,521 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 62 [2020-09-24 19:34:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:13,522 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2020-09-24 19:34:13,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:34:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2020-09-24 19:34:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 19:34:13,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:13,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:13,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:34:13,531 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:13,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1622337752, now seen corresponding path program 1 times [2020-09-24 19:34:13,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:13,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515991210] [2020-09-24 19:34:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:13,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:14,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:14,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:14,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 19:34:14,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:34:14,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:34:14,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:14,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:34:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 19:34:14,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:34:14,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:14,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:14,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:14,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:14,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:14,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:14,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:14,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:14,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:14,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:14,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:14,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 19:34:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:14,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:14,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:14,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:14,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:34:14,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:14,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:14,641 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 19:34:14,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515991210] [2020-09-24 19:34:14,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:14,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:34:14,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682481353] [2020-09-24 19:34:14,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:34:14,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:34:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:34:14,644 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand 6 states. [2020-09-24 19:34:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:14,904 INFO L93 Difference]: Finished difference Result 325 states and 368 transitions. [2020-09-24 19:34:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:34:14,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-09-24 19:34:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:14,910 INFO L225 Difference]: With dead ends: 325 [2020-09-24 19:34:14,910 INFO L226 Difference]: Without dead ends: 238 [2020-09-24 19:34:14,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:34:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-24 19:34:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 175. [2020-09-24 19:34:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-24 19:34:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2020-09-24 19:34:14,932 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 64 [2020-09-24 19:34:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:14,932 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2020-09-24 19:34:14,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:34:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2020-09-24 19:34:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 19:34:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:14,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:14,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:34:14,940 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-09-24 19:34:14,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:14,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86396719] [2020-09-24 19:34:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:14,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:15,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:15,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 19:34:15,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:34:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:34:15,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:34:15,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 19:34:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:34:15,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:16,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:16,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:16,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:16,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:16,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:16,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:16,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 19:34:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:16,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:16,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:16,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:16,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:16,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:34:16,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:16,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:16,081 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 19:34:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86396719] [2020-09-24 19:34:16,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:16,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:34:16,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183759560] [2020-09-24 19:34:16,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:34:16,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:34:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:34:16,085 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand 8 states. [2020-09-24 19:34:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:16,566 INFO L93 Difference]: Finished difference Result 353 states and 394 transitions. [2020-09-24 19:34:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:34:16,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-09-24 19:34:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:16,569 INFO L225 Difference]: With dead ends: 353 [2020-09-24 19:34:16,569 INFO L226 Difference]: Without dead ends: 248 [2020-09-24 19:34:16,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:34:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-24 19:34:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 197. [2020-09-24 19:34:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-24 19:34:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 220 transitions. [2020-09-24 19:34:16,600 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 220 transitions. Word has length 65 [2020-09-24 19:34:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:16,600 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 220 transitions. [2020-09-24 19:34:16,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:34:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 220 transitions. [2020-09-24 19:34:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 19:34:16,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:16,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:16,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:34:16,607 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash -508291602, now seen corresponding path program 1 times [2020-09-24 19:34:16,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:16,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969636438] [2020-09-24 19:34:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:16,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:16,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:17,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:17,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 19:34:17,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:34:17,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:34:17,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:17,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:34:17,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-24 19:34:17,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 19:34:17,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:17,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:17,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:17,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:17,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:17,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:17,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:17,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:17,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:17,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:17,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:17,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 19:34:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:17,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:17,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:17,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:17,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:17,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:17,705 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 19:34:17,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969636438] [2020-09-24 19:34:17,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:17,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:34:17,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879811042] [2020-09-24 19:34:17,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:34:17,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:34:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:34:17,709 INFO L87 Difference]: Start difference. First operand 197 states and 220 transitions. Second operand 5 states. [2020-09-24 19:34:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:17,894 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions. [2020-09-24 19:34:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:34:17,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-09-24 19:34:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:17,897 INFO L225 Difference]: With dead ends: 321 [2020-09-24 19:34:17,897 INFO L226 Difference]: Without dead ends: 209 [2020-09-24 19:34:17,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:34:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-24 19:34:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2020-09-24 19:34:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-24 19:34:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 225 transitions. [2020-09-24 19:34:17,918 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 225 transitions. Word has length 68 [2020-09-24 19:34:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:17,918 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 225 transitions. [2020-09-24 19:34:17,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:34:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 225 transitions. [2020-09-24 19:34:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 19:34:17,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:17,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:17,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:34:17,921 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash 574058161, now seen corresponding path program 1 times [2020-09-24 19:34:17,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:17,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595159886] [2020-09-24 19:34:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:17,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:18,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:18,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:18,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 19:34:18,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:34:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:34:18,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:34:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 19:34:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:34:18,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:18,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:19,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:19,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:19,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:19,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:34:19,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:19,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:19,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:19,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:19,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:19,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 19:34:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:19,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:19,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:19,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:19,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:34:19,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:19,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:19,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:19,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:19,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:19,026 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 19:34:19,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595159886] [2020-09-24 19:34:19,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:19,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:34:19,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391044354] [2020-09-24 19:34:19,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:34:19,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:34:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:34:19,028 INFO L87 Difference]: Start difference. First operand 202 states and 225 transitions. Second operand 8 states. [2020-09-24 19:34:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:19,541 INFO L93 Difference]: Finished difference Result 600 states and 679 transitions. [2020-09-24 19:34:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:34:19,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-09-24 19:34:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:19,550 INFO L225 Difference]: With dead ends: 600 [2020-09-24 19:34:19,551 INFO L226 Difference]: Without dead ends: 503 [2020-09-24 19:34:19,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:34:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-09-24 19:34:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 275. [2020-09-24 19:34:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-09-24 19:34:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 312 transitions. [2020-09-24 19:34:19,567 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 312 transitions. Word has length 70 [2020-09-24 19:34:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:19,567 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 312 transitions. [2020-09-24 19:34:19,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:34:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 312 transitions. [2020-09-24 19:34:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 19:34:19,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:19,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:19,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:34:19,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:19,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:19,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1978608942, now seen corresponding path program 1 times [2020-09-24 19:34:19,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:19,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617928817] [2020-09-24 19:34:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:20,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:20,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 19:34:20,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:34:20,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-24 19:34:20,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:34:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-24 19:34:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:34:20,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:20,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:20,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:20,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:20,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:20,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:20,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:20,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:20,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:20,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:20,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:20,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:20,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 19:34:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:20,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:20,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:20,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:20,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:34:20,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:20,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:20,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:20,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:20,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:20,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617928817] [2020-09-24 19:34:20,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:20,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:34:20,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991377347] [2020-09-24 19:34:20,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:34:20,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:20,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:34:20,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:34:20,698 INFO L87 Difference]: Start difference. First operand 275 states and 312 transitions. Second operand 6 states. [2020-09-24 19:34:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:21,056 INFO L93 Difference]: Finished difference Result 441 states and 497 transitions. [2020-09-24 19:34:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:34:21,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-09-24 19:34:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:21,060 INFO L225 Difference]: With dead ends: 441 [2020-09-24 19:34:21,060 INFO L226 Difference]: Without dead ends: 321 [2020-09-24 19:34:21,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:34:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-09-24 19:34:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 265. [2020-09-24 19:34:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-24 19:34:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 299 transitions. [2020-09-24 19:34:21,080 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 299 transitions. Word has length 71 [2020-09-24 19:34:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:21,080 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 299 transitions. [2020-09-24 19:34:21,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:34:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 299 transitions. [2020-09-24 19:34:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 19:34:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:21,084 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:21,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:34:21,084 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-09-24 19:34:21,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:21,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668707000] [2020-09-24 19:34:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:21,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:21,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:21,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:22,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:22,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:22,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 19:34:22,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:34:22,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:34:22,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:34:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 19:34:22,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 19:34:22,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:22,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:22,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:22,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:34:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:22,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:22,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:34:22,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 19:34:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:22,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:22,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:22,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:22,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:22,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:22,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668707000] [2020-09-24 19:34:22,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:22,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:34:22,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208862788] [2020-09-24 19:34:22,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:34:22,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:22,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:34:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:34:22,243 INFO L87 Difference]: Start difference. First operand 265 states and 299 transitions. Second operand 8 states. [2020-09-24 19:34:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:22,768 INFO L93 Difference]: Finished difference Result 478 states and 536 transitions. [2020-09-24 19:34:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:34:22,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-09-24 19:34:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:22,772 INFO L225 Difference]: With dead ends: 478 [2020-09-24 19:34:22,772 INFO L226 Difference]: Without dead ends: 371 [2020-09-24 19:34:22,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:34:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-09-24 19:34:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 284. [2020-09-24 19:34:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-09-24 19:34:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 321 transitions. [2020-09-24 19:34:22,787 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 321 transitions. Word has length 72 [2020-09-24 19:34:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:22,787 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 321 transitions. [2020-09-24 19:34:22,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:34:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 321 transitions. [2020-09-24 19:34:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 19:34:22,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:22,789 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:22,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:34:22,790 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-09-24 19:34:22,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:22,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859193906] [2020-09-24 19:34:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:22,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:22,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:23,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 19:34:23,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 19:34:23,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:34:23,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:34:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 19:34:23,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 19:34:23,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:23,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:23,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:23,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:23,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:23,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:23,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:23,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:23,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:23,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:23,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 19:34:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:23,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:23,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:23,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:23,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:23,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859193906] [2020-09-24 19:34:23,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:23,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 19:34:23,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618887642] [2020-09-24 19:34:23,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:34:23,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:34:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:34:23,929 INFO L87 Difference]: Start difference. First operand 284 states and 321 transitions. Second operand 10 states. [2020-09-24 19:34:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:24,642 INFO L93 Difference]: Finished difference Result 526 states and 590 transitions. [2020-09-24 19:34:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 19:34:24,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-09-24 19:34:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:24,647 INFO L225 Difference]: With dead ends: 526 [2020-09-24 19:34:24,647 INFO L226 Difference]: Without dead ends: 419 [2020-09-24 19:34:24,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-09-24 19:34:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-09-24 19:34:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 272. [2020-09-24 19:34:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-24 19:34:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 307 transitions. [2020-09-24 19:34:24,667 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 307 transitions. Word has length 75 [2020-09-24 19:34:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:24,668 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 307 transitions. [2020-09-24 19:34:24,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:34:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 307 transitions. [2020-09-24 19:34:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 19:34:24,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:24,671 INFO L422 BasicCegarLoop]: trace histogram [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, 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 19:34:24,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:34:24,671 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:24,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1867056643, now seen corresponding path program 1 times [2020-09-24 19:34:24,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:24,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300459333] [2020-09-24 19:34:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:24,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:24,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:24,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:25,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:25,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:25,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 19:34:25,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:34:25,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-24 19:34:25,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:34:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-24 19:34:25,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 19:34:25,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:25,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:25,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:25,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:25,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:25,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:25,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:25,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:25,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 19:34:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:25,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:25,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:25,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:25,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:25,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:25,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:25,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:25,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:25,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:25,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:25,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300459333] [2020-09-24 19:34:25,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:34:25,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:34:25,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153899415] [2020-09-24 19:34:25,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:34:25,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:34:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:34:25,747 INFO L87 Difference]: Start difference. First operand 272 states and 307 transitions. Second operand 4 states. [2020-09-24 19:34:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:25,897 INFO L93 Difference]: Finished difference Result 424 states and 476 transitions. [2020-09-24 19:34:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:34:25,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-09-24 19:34:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:25,900 INFO L225 Difference]: With dead ends: 424 [2020-09-24 19:34:25,900 INFO L226 Difference]: Without dead ends: 272 [2020-09-24 19:34:25,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:34:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-24 19:34:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2020-09-24 19:34:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-24 19:34:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 303 transitions. [2020-09-24 19:34:25,912 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 303 transitions. Word has length 80 [2020-09-24 19:34:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:25,913 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 303 transitions. [2020-09-24 19:34:25,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:34:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 303 transitions. [2020-09-24 19:34:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 19:34:25,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:25,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:25,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:34:25,915 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:25,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1111268393, now seen corresponding path program 1 times [2020-09-24 19:34:25,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:25,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646468146] [2020-09-24 19:34:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:26,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:26,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:26,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:26,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 19:34:26,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:34:26,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-24 19:34:26,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:26,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:34:26,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 19:34:26,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 19:34:26,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:27,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:34:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:27,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:27,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:34:27,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:34:27,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:34:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:27,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:27,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 19:34:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:34:27,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:34:27,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:34:27,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 19:34:27,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:34:27,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:34:27,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:34:27,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:34:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 19:34:27,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:34:27,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:34:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:34:27,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646468146] [2020-09-24 19:34:27,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:34:27,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:34:27,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907295675] [2020-09-24 19:34:27,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:34:27,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:34:27,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:34:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:34:27,048 INFO L87 Difference]: Start difference. First operand 272 states and 303 transitions. Second operand 10 states. [2020-09-24 19:34:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:34:27,606 INFO L93 Difference]: Finished difference Result 607 states and 675 transitions. [2020-09-24 19:34:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 19:34:27,607 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-09-24 19:34:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:34:27,613 INFO L225 Difference]: With dead ends: 607 [2020-09-24 19:34:27,613 INFO L226 Difference]: Without dead ends: 394 [2020-09-24 19:34:27,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-09-24 19:34:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-24 19:34:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 315. [2020-09-24 19:34:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-09-24 19:34:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 344 transitions. [2020-09-24 19:34:27,647 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 344 transitions. Word has length 81 [2020-09-24 19:34:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:34:27,647 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 344 transitions. [2020-09-24 19:34:27,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:34:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 344 transitions. [2020-09-24 19:34:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-24 19:34:27,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:34:27,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:34:27,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 19:34:27,652 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:34:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:34:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 2 times [2020-09-24 19:34:27,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:34:27,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043230155] [2020-09-24 19:34:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:34:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:34:27,686 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:34:27,687 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:34:27,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 19:34:27,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:34:27 BoogieIcfgContainer [2020-09-24 19:34:27,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:34:27,745 INFO L168 Benchmark]: Toolchain (without parser) took 20578.62 ms. Allocated memory was 139.5 MB in the beginning and 363.3 MB in the end (delta: 223.9 MB). Free memory was 102.3 MB in the beginning and 141.1 MB in the end (delta: -38.9 MB). Peak memory consumption was 185.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:27,746 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:34:27,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.11 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 178.5 MB in the end (delta: -76.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:27,748 INFO L168 Benchmark]: Boogie Preprocessor took 86.05 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 176.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:27,749 INFO L168 Benchmark]: RCFGBuilder took 560.41 ms. Allocated memory is still 202.4 MB. Free memory was 176.5 MB in the beginning and 143.4 MB in the end (delta: 33.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:27,760 INFO L168 Benchmark]: TraceAbstraction took 19460.50 ms. Allocated memory was 202.4 MB in the beginning and 363.3 MB in the end (delta: 161.0 MB). Free memory was 143.4 MB in the beginning and 141.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 163.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:34:27,769 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 461.11 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 178.5 MB in the end (delta: -76.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.05 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 176.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 560.41 ms. Allocated memory is still 202.4 MB. Free memory was 176.5 MB in the beginning and 143.4 MB in the end (delta: 33.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19460.50 ms. Allocated memory was 202.4 MB in the beginning and 363.3 MB in the end (delta: 161.0 MB). Free memory was 143.4 MB in the beginning and 141.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 163.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.3s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1493 SDtfs, 1686 SDslu, 3422 SDs, 0 SdLazy, 2757 SolverSat, 176 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=315occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 749 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 908 NumberOfCodeBlocks, 908 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 804 ConstructedInterpolants, 0 QuantifiedInterpolants, 107891 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 11 PerfectInterpolantSequences, 11/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...