/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:18:39,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:18:39,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:18:39,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:18:39,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:18:39,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:18:39,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:18:39,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:18:39,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:18:39,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:18:39,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:18:39,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:18:39,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:18:39,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:18:39,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:18:39,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:18:39,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:18:39,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:18:39,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:18:39,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:18:39,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:18:39,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:18:39,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:18:39,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:18:39,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:18:39,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:18:39,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:18:39,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:18:39,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:18:39,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:18:39,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:18:39,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:18:39,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:18:39,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:18:39,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:18:39,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:18:39,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:18:39,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:18:39,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:18:39,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:18:39,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:18:39,398 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 [2020-08-18 20:18:39,421 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:18:39,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:18:39,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:18:39,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:18:39,422 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:18:39,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:18:39,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:18:39,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:18:39,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:18:39,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:18:39,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:18:39,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:18:39,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:18:39,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:18:39,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:18:39,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:18:39,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:18:39,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:18:39,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:18:39,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:18:39,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:18:39,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:18:39,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:18:39,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:18:39,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:18:39,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:18:39,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:18:39,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:18:39,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:18:39,427 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:18:39,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:18:39,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:18:39,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:18:39,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:18:39,755 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:18:39,756 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-18 20:18:39,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7c92ff90/4942a8e1968541d8a2fa48e3ba94036c/FLAG9e298ae11 [2020-08-18 20:18:40,334 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:18:40,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-18 20:18:40,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7c92ff90/4942a8e1968541d8a2fa48e3ba94036c/FLAG9e298ae11 [2020-08-18 20:18:40,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7c92ff90/4942a8e1968541d8a2fa48e3ba94036c [2020-08-18 20:18:40,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:18:40,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:18:40,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:40,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:18:40,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:18:40,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:40,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb9198f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40, skipping insertion in model container [2020-08-18 20:18:40,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:40,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:18:40,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:18:41,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:41,257 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:18:41,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:41,396 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:18:41,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41 WrapperNode [2020-08-18 20:18:41,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:41,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:18:41,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:18:41,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:18:41,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (1/1) ... [2020-08-18 20:18:41,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:18:41,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:18:41,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:18:41,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:18:41,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (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 [2020-08-18 20:18:41,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:18:41,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:18:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 20:18:41,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-18 20:18:41,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-18 20:18:41,582 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-18 20:18:41,582 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-18 20:18:41,582 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-18 20:18:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-18 20:18:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-18 20:18:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-18 20:18:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-18 20:18:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-18 20:18:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-18 20:18:41,584 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-18 20:18:41,585 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-18 20:18:41,585 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-18 20:18:41,586 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-18 20:18:41,586 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-18 20:18:41,586 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-18 20:18:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-18 20:18:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:18:41,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:18:41,587 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 20:18:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 20:18:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 20:18:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 20:18:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 20:18:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 20:18:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 20:18:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 20:18:41,592 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 20:18:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 20:18:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 20:18:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 20:18:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 20:18:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 20:18:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 20:18:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 20:18:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 20:18:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 20:18:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 20:18:41,596 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 20:18:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 20:18:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 20:18:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 20:18:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 20:18:41,597 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 20:18:41,598 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 20:18:41,598 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 20:18:41,599 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 20:18:41,599 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:18:41,600 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 20:18:41,600 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 20:18:41,600 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:18:41,601 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 20:18:41,601 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 20:18:41,601 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 20:18:41,601 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 20:18:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 20:18:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 20:18:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 20:18:41,603 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 20:18:41,604 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 20:18:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 20:18:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 20:18:41,607 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 20:18:41,607 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 20:18:41,607 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 20:18:41,608 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 20:18:41,608 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 20:18:41,609 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 20:18:41,609 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 20:18:41,609 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 20:18:41,609 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 20:18:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 20:18:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 20:18:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 20:18:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 20:18:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:18:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-18 20:18:41,611 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-18 20:18:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:18:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:18:41,615 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-18 20:18:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-18 20:18:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:18:41,616 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-18 20:18:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:18:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 20:18:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 20:18:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:18:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-18 20:18:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-18 20:18:41,625 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-18 20:18:41,625 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-18 20:18:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-18 20:18:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:18:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:18:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:18:42,754 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:18:42,755 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-18 20:18:42,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:42 BoogieIcfgContainer [2020-08-18 20:18:42,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:18:42,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:18:42,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:18:42,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:18:42,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:18:40" (1/3) ... [2020-08-18 20:18:42,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141f0566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:42, skipping insertion in model container [2020-08-18 20:18:42,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:41" (2/3) ... [2020-08-18 20:18:42,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141f0566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:42, skipping insertion in model container [2020-08-18 20:18:42,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:42" (3/3) ... [2020-08-18 20:18:42,770 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-18 20:18:42,782 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:18:42,790 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:18:42,807 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:18:42,836 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:18:42,836 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:18:42,836 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:18:42,837 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:18:42,837 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:18:42,837 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:18:42,837 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:18:42,837 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:18:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-18 20:18:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 20:18:42,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,874 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-18 20:18:42,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718729841] [2020-08-18 20:18:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 20:18:43,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718729841] [2020-08-18 20:18:43,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:18:43,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221387968] [2020-08-18 20:18:43,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:18:43,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:18:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:18:43,420 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-18 20:18:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,871 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-18 20:18:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:18:43,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-18 20:18:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,887 INFO L225 Difference]: With dead ends: 343 [2020-08-18 20:18:43,888 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 20:18:43,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:18:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 20:18:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-18 20:18:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 20:18:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-18 20:18:43,968 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-18 20:18:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,969 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-18 20:18:43,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:18:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-18 20:18:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 20:18:43,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:18:43,976 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-18 20:18:43,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311759199] [2020-08-18 20:18:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 20:18:44,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311759199] [2020-08-18 20:18:44,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:44,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 20:18:44,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963345213] [2020-08-18 20:18:44,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 20:18:44,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 20:18:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:18:44,573 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-18 20:18:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:45,808 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-18 20:18:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:18:45,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-18 20:18:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:45,813 INFO L225 Difference]: With dead ends: 327 [2020-08-18 20:18:45,814 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 20:18:45,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-18 20:18:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 20:18:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-18 20:18:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 20:18:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-18 20:18:45,840 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-18 20:18:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:45,841 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-18 20:18:45,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 20:18:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-18 20:18:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 20:18:45,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:45,847 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:45,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:18:45,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-18 20:18:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:45,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040125087] [2020-08-18 20:18:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:46,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 20:18:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 20:18:47,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040125087] [2020-08-18 20:18:47,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:47,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 20:18:47,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94635255] [2020-08-18 20:18:47,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 20:18:47,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 20:18:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-18 20:18:47,550 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-18 20:18:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:50,480 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-18 20:18:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 20:18:50,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-18 20:18:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:50,486 INFO L225 Difference]: With dead ends: 348 [2020-08-18 20:18:50,486 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 20:18:50,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 20:18:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 20:18:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-18 20:18:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-18 20:18:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-18 20:18:50,536 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-18 20:18:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:50,537 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-18 20:18:50,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 20:18:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-18 20:18:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 20:18:50,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:50,543 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:50,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:18:50,545 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-18 20:18:50,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:50,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299173549] [2020-08-18 20:18:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:50,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:50,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:50,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:50,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 20:18:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-18 20:18:51,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299173549] [2020-08-18 20:18:51,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:51,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 20:18:51,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391211422] [2020-08-18 20:18:51,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 20:18:51,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:51,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 20:18:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-18 20:18:51,683 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-18 20:18:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:53,876 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-18 20:18:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 20:18:53,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-18 20:18:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:53,879 INFO L225 Difference]: With dead ends: 360 [2020-08-18 20:18:53,879 INFO L226 Difference]: Without dead ends: 193 [2020-08-18 20:18:53,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-18 20:18:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-18 20:18:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-18 20:18:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 20:18:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-18 20:18:53,903 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-18 20:18:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:53,903 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-18 20:18:53,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 20:18:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-18 20:18:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 20:18:53,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:53,909 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:53,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:18:53,910 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-18 20:18:53,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:53,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754182427] [2020-08-18 20:18:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 20:18:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:54,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-18 20:18:55,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754182427] [2020-08-18 20:18:55,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:55,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 20:18:55,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423838787] [2020-08-18 20:18:55,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 20:18:55,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 20:18:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-18 20:18:55,386 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-18 20:18:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:58,095 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-18 20:18:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 20:18:58,095 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-18 20:18:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:58,099 INFO L225 Difference]: With dead ends: 371 [2020-08-18 20:18:58,100 INFO L226 Difference]: Without dead ends: 198 [2020-08-18 20:18:58,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 20:18:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-18 20:18:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-18 20:18:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 20:18:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-18 20:18:58,130 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-18 20:18:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:58,133 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-18 20:18:58,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 20:18:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-18 20:18:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 20:18:58,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:58,140 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:58,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:18:58,143 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-18 20:18:58,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:58,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124569334] [2020-08-18 20:18:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:18:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:58,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 20:18:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:18:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:18:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:18:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:18:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-18 20:18:59,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124569334] [2020-08-18 20:18:59,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:18:59,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 20:18:59,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501486165] [2020-08-18 20:18:59,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 20:18:59,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 20:18:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-18 20:18:59,669 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-18 20:19:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:19:01,879 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-18 20:19:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 20:19:01,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-18 20:19:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:19:01,884 INFO L225 Difference]: With dead ends: 323 [2020-08-18 20:19:01,884 INFO L226 Difference]: Without dead ends: 254 [2020-08-18 20:19:01,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 20:19:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-18 20:19:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-18 20:19:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 20:19:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-18 20:19:01,906 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-18 20:19:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:19:01,907 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-18 20:19:01,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 20:19:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-18 20:19:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-18 20:19:01,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:19:01,910 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:19:01,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:19:01,910 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:19:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:19:01,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-18 20:19:01,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:19:01,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311818853] [2020-08-18 20:19:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:19:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:19:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:02,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:19:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:19:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:02,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:19:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:02,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:19:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:03,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:19:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:03,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:19:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:03,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:19:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:04,092 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-18 20:19:04,924 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-18 20:19:05,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:19:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:05,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:19:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:05,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:19:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:05,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 20:19:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:05,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:19:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:06,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:19:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:06,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 20:19:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:06,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:19:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:07,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:19:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:07,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:19:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:19:07,980 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-18 20:19:07,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:19:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat