/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:40:40,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:40:40,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:40:40,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:40:40,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:40:40,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:40:40,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:40:40,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:40:40,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:40:40,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:40:40,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:40:40,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:40:40,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:40:40,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:40:40,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:40:40,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:40:40,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:40:40,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:40:40,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:40:40,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:40:40,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:40:40,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:40:40,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:40:40,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:40:40,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:40:40,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:40:40,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:40:40,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:40:40,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:40:40,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:40:40,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:40:40,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:40:40,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:40:40,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:40:40,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:40:40,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:40:40,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:40:40,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:40:40,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:40:40,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:40:40,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:40:40,561 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 [2020-08-21 16:40:40,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:40:40,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:40:40,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:40:40,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:40:40,586 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:40:40,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:40:40,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:40:40,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:40:40,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:40:40,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:40:40,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:40:40,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:40:40,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:40:40,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:40:40,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:40:40,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:40:40,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:40:40,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:40:40,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:40:40,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:40:40,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:40:40,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:40:40,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:40:40,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:40:40,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:40:40,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:40:40,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:40:40,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:40:40,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:40:40,591 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:40:40,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:40:40,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:40:40,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:40:40,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:40:40,905 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:40:40,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c [2020-08-21 16:40:40,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26d57a924/76f4ccd91dba4697b415ebcd101d0d58/FLAGc3af8ba6a [2020-08-21 16:40:41,407 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:40:41,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c [2020-08-21 16:40:41,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26d57a924/76f4ccd91dba4697b415ebcd101d0d58/FLAGc3af8ba6a [2020-08-21 16:40:41,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26d57a924/76f4ccd91dba4697b415ebcd101d0d58 [2020-08-21 16:40:41,750 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:40:41,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:40:41,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:41,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:40:41,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:40:41,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:41" (1/1) ... [2020-08-21 16:40:41,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9515d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:41, skipping insertion in model container [2020-08-21 16:40:41,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:41" (1/1) ... [2020-08-21 16:40:41,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:40:41,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:40:42,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:42,280 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:40:42,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:42,376 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:40:42,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42 WrapperNode [2020-08-21 16:40:42,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:42,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:40:42,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:40:42,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:40:42,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (1/1) ... [2020-08-21 16:40:42,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:40:42,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:40:42,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:40:42,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:40:42,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (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 [2020-08-21 16:40:42,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:40:42,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:40:42,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:40:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-08-21 16:40:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-08-21 16:40:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-08-21 16:40:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-08-21 16:40:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-08-21 16:40:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-08-21 16:40:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-08-21 16:40:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-08-21 16:40:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:40:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:40:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:40:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:40:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:40:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-08-21 16:40:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 16:40:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-21 16:40:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-08-21 16:40:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-08-21 16:40:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-08-21 16:40:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-08-21 16:40:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:40:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-08-21 16:40:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-08-21 16:40:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 16:40:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:40:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:40:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:40:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:40:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:40:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 16:40:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:40:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:40:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:40:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:40:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:40:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 16:40:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:40:43,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:40:43,609 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-08-21 16:40:43,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:43 BoogieIcfgContainer [2020-08-21 16:40:43,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:40:43,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:40:43,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:40:43,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:40:43,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:40:41" (1/3) ... [2020-08-21 16:40:43,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59909704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:43, skipping insertion in model container [2020-08-21 16:40:43,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:42" (2/3) ... [2020-08-21 16:40:43,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59909704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:43, skipping insertion in model container [2020-08-21 16:40:43,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:43" (3/3) ... [2020-08-21 16:40:43,627 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_4.c [2020-08-21 16:40:43,637 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:40:43,643 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:40:43,654 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:40:43,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:40:43,674 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:40:43,675 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:40:43,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:40:43,675 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:40:43,675 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:40:43,676 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:40:43,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:40:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-08-21 16:40:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 16:40:43,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:43,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:43,710 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1328586124, now seen corresponding path program 1 times [2020-08-21 16:40:43,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:43,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32188315] [2020-08-21 16:40:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:44,235 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 16:40:44,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:44,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:44,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 16:40:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:44,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:40:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:44,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32188315] [2020-08-21 16:40:44,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:44,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:40:44,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89372355] [2020-08-21 16:40:44,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:40:44,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:44,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:40:44,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:40:44,401 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 5 states. [2020-08-21 16:40:44,554 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-21 16:40:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:47,568 INFO L93 Difference]: Finished difference Result 267 states and 410 transitions. [2020-08-21 16:40:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:40:47,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-08-21 16:40:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:47,584 INFO L225 Difference]: With dead ends: 267 [2020-08-21 16:40:47,584 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 16:40:47,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 16:40:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-08-21 16:40:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-21 16:40:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 168 transitions. [2020-08-21 16:40:47,656 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 168 transitions. Word has length 43 [2020-08-21 16:40:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:47,657 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 168 transitions. [2020-08-21 16:40:47,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:40:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 168 transitions. [2020-08-21 16:40:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 16:40:47,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:47,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:47,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:40:47,662 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash -294008176, now seen corresponding path program 1 times [2020-08-21 16:40:47,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:47,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611269874] [2020-08-21 16:40:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:47,853 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 16:40:47,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:47,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:47,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 16:40:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:47,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:40:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:47,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611269874] [2020-08-21 16:40:47,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:47,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:40:47,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244342599] [2020-08-21 16:40:47,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:40:47,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:40:47,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:47,949 INFO L87 Difference]: Start difference. First operand 121 states and 168 transitions. Second operand 6 states. [2020-08-21 16:40:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:49,095 INFO L93 Difference]: Finished difference Result 267 states and 385 transitions. [2020-08-21 16:40:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:40:49,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-08-21 16:40:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:49,100 INFO L225 Difference]: With dead ends: 267 [2020-08-21 16:40:49,100 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 16:40:49,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 16:40:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 123. [2020-08-21 16:40:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 16:40:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-08-21 16:40:49,127 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 45 [2020-08-21 16:40:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:49,127 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-08-21 16:40:49,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:40:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-08-21 16:40:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 16:40:49,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:49,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:49,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:40:49,131 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1235066606, now seen corresponding path program 2 times [2020-08-21 16:40:49,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:49,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390309841] [2020-08-21 16:40:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:49,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:49,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:49,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 16:40:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:49,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 16:40:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:49,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390309841] [2020-08-21 16:40:49,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:49,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:40:49,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469845567] [2020-08-21 16:40:49,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:40:49,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:40:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:49,468 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 7 states. [2020-08-21 16:40:49,614 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-21 16:40:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:52,750 INFO L93 Difference]: Finished difference Result 289 states and 419 transitions. [2020-08-21 16:40:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:40:52,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-08-21 16:40:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:52,753 INFO L225 Difference]: With dead ends: 289 [2020-08-21 16:40:52,754 INFO L226 Difference]: Without dead ends: 184 [2020-08-21 16:40:52,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:40:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-21 16:40:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 125. [2020-08-21 16:40:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 16:40:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2020-08-21 16:40:52,787 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 47 [2020-08-21 16:40:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:52,788 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2020-08-21 16:40:52,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:40:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2020-08-21 16:40:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 16:40:52,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:52,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:52,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:40:52,801 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash 645881620, now seen corresponding path program 3 times [2020-08-21 16:40:52,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:52,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415074193] [2020-08-21 16:40:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:52,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 16:40:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 16:40:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:53,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415074193] [2020-08-21 16:40:53,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:53,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:40:53,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404383203] [2020-08-21 16:40:53,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:40:53,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:40:53,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:40:53,086 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand 8 states. [2020-08-21 16:40:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:54,673 INFO L93 Difference]: Finished difference Result 309 states and 451 transitions. [2020-08-21 16:40:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:40:54,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-08-21 16:40:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:54,676 INFO L225 Difference]: With dead ends: 309 [2020-08-21 16:40:54,676 INFO L226 Difference]: Without dead ends: 204 [2020-08-21 16:40:54,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:40:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-21 16:40:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-08-21 16:40:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 16:40:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2020-08-21 16:40:54,714 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 49 [2020-08-21 16:40:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:54,714 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2020-08-21 16:40:54,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:40:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2020-08-21 16:40:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 16:40:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:54,717 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:54,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:40:54,717 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash -375236310, now seen corresponding path program 1 times [2020-08-21 16:40:54,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:54,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49686702] [2020-08-21 16:40:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,885 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 16:40:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:40:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:40:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-21 16:40:54,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49686702] [2020-08-21 16:40:54,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:54,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:40:54,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367016182] [2020-08-21 16:40:54,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:40:54,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:40:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:40:54,972 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand 5 states. [2020-08-21 16:40:55,086 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-21 16:40:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:55,748 INFO L93 Difference]: Finished difference Result 178 states and 240 transitions. [2020-08-21 16:40:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:40:55,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-08-21 16:40:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:55,752 INFO L225 Difference]: With dead ends: 178 [2020-08-21 16:40:55,752 INFO L226 Difference]: Without dead ends: 135 [2020-08-21 16:40:55,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-21 16:40:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-08-21 16:40:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 16:40:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 173 transitions. [2020-08-21 16:40:55,767 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 173 transitions. Word has length 55 [2020-08-21 16:40:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:55,768 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 173 transitions. [2020-08-21 16:40:55,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:40:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 173 transitions. [2020-08-21 16:40:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 16:40:55,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:55,770 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:55,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:40:55,770 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:55,770 INFO L82 PathProgramCache]: Analyzing trace with hash -7587439, now seen corresponding path program 1 times [2020-08-21 16:40:55,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:55,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835937725] [2020-08-21 16:40:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,937 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 16:40:55,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:55,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:56,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 16:40:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:56,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 16:40:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-21 16:40:56,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835937725] [2020-08-21 16:40:56,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:56,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:40:56,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839114458] [2020-08-21 16:40:56,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:40:56,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:40:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:40:56,025 INFO L87 Difference]: Start difference. First operand 127 states and 173 transitions. Second operand 5 states. [2020-08-21 16:40:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:56,992 INFO L93 Difference]: Finished difference Result 188 states and 256 transitions. [2020-08-21 16:40:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:40:56,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-08-21 16:40:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:56,995 INFO L225 Difference]: With dead ends: 188 [2020-08-21 16:40:56,995 INFO L226 Difference]: Without dead ends: 145 [2020-08-21 16:40:56,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-21 16:40:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2020-08-21 16:40:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-08-21 16:40:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-08-21 16:40:57,010 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 56 [2020-08-21 16:40:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:57,010 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-08-21 16:40:57,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:40:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-08-21 16:40:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:40:57,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:57,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:57,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:40:57,012 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2075209529, now seen corresponding path program 1 times [2020-08-21 16:40:57,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:57,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597813188] [2020-08-21 16:40:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,177 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 16:40:57,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:40:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:40:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:40:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-21 16:40:57,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597813188] [2020-08-21 16:40:57,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:57,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:40:57,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714135724] [2020-08-21 16:40:57,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:40:57,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:40:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:40:57,230 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 5 states. [2020-08-21 16:40:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:58,012 INFO L93 Difference]: Finished difference Result 167 states and 223 transitions. [2020-08-21 16:40:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:40:58,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-21 16:40:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:58,014 INFO L225 Difference]: With dead ends: 167 [2020-08-21 16:40:58,014 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 16:40:58,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 16:40:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-08-21 16:40:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-21 16:40:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2020-08-21 16:40:58,027 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 61 [2020-08-21 16:40:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:58,028 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2020-08-21 16:40:58,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:40:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2020-08-21 16:40:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:40:58,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:58,030 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:58,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:40:58,030 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash 450483994, now seen corresponding path program 1 times [2020-08-21 16:40:58,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:58,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213846368] [2020-08-21 16:40:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:40:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:40:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:40:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 16:40:58,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213846368] [2020-08-21 16:40:58,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:58,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:40:58,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885245232] [2020-08-21 16:40:58,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:40:58,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:40:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:40:58,264 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand 6 states. [2020-08-21 16:40:58,402 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-21 16:40:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:59,372 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-08-21 16:40:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:40:59,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 16:40:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:59,374 INFO L225 Difference]: With dead ends: 171 [2020-08-21 16:40:59,375 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 16:40:59,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 16:40:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-08-21 16:40:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-21 16:40:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2020-08-21 16:40:59,387 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 61 [2020-08-21 16:40:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:59,388 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2020-08-21 16:40:59,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:40:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2020-08-21 16:40:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 16:40:59,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:59,390 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:59,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:40:59,390 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1892847615, now seen corresponding path program 2 times [2020-08-21 16:40:59,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:59,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332985170] [2020-08-21 16:40:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:40:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:40:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:40:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 16:40:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 16:40:59,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332985170] [2020-08-21 16:40:59,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:59,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:40:59,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19106157] [2020-08-21 16:40:59,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:40:59,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:40:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:59,610 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand 7 states. [2020-08-21 16:41:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:00,652 INFO L93 Difference]: Finished difference Result 175 states and 235 transitions. [2020-08-21 16:41:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:41:00,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-08-21 16:41:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:00,656 INFO L225 Difference]: With dead ends: 175 [2020-08-21 16:41:00,656 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 16:41:00,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:41:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 16:41:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-08-21 16:41:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 16:41:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 187 transitions. [2020-08-21 16:41:00,669 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 187 transitions. Word has length 65 [2020-08-21 16:41:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:00,669 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 187 transitions. [2020-08-21 16:41:00,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:41:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 187 transitions. [2020-08-21 16:41:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 16:41:00,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:00,671 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:00,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:41:00,671 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash 212614504, now seen corresponding path program 3 times [2020-08-21 16:41:00,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:00,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285019553] [2020-08-21 16:41:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:00,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:00,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 16:41:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:00,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:41:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:00,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 16:41:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:00,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 16:41:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 16:41:00,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285019553] [2020-08-21 16:41:00,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:41:00,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:41:00,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957045128] [2020-08-21 16:41:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:41:00,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:41:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:41:00,910 INFO L87 Difference]: Start difference. First operand 137 states and 187 transitions. Second operand 8 states. [2020-08-21 16:41:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:01,984 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2020-08-21 16:41:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:41:01,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-08-21 16:41:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:01,987 INFO L225 Difference]: With dead ends: 179 [2020-08-21 16:41:01,987 INFO L226 Difference]: Without dead ends: 144 [2020-08-21 16:41:01,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:41:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-21 16:41:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-08-21 16:41:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-21 16:41:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2020-08-21 16:41:01,999 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 69 [2020-08-21 16:41:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:02,000 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2020-08-21 16:41:02,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:41:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2020-08-21 16:41:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 16:41:02,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:02,002 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:02,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:41:02,002 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -374866097, now seen corresponding path program 4 times [2020-08-21 16:41:02,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:02,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224028161] [2020-08-21 16:41:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:02,036 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 16:41:02,036 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 16:41:02,036 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:41:02,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:41:02,082 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 16:41:02,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:41:02 BoogieIcfgContainer [2020-08-21 16:41:02,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:41:02,084 INFO L168 Benchmark]: Toolchain (without parser) took 20332.78 ms. Allocated memory was 147.8 MB in the beginning and 394.3 MB in the end (delta: 246.4 MB). Free memory was 101.9 MB in the beginning and 296.1 MB in the end (delta: -194.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:02,085 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:41:02,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 624.79 ms. Allocated memory was 147.8 MB in the beginning and 206.6 MB in the end (delta: 58.7 MB). Free memory was 101.7 MB in the beginning and 176.5 MB in the end (delta: -74.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:02,086 INFO L168 Benchmark]: Boogie Preprocessor took 91.74 ms. Allocated memory is still 206.6 MB. Free memory was 176.5 MB in the beginning and 172.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:02,087 INFO L168 Benchmark]: RCFGBuilder took 1147.05 ms. Allocated memory is still 206.6 MB. Free memory was 172.3 MB in the beginning and 110.1 MB in the end (delta: 62.2 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:02,088 INFO L168 Benchmark]: TraceAbstraction took 18461.95 ms. Allocated memory was 206.6 MB in the beginning and 394.3 MB in the end (delta: 187.7 MB). Free memory was 109.5 MB in the beginning and 296.1 MB in the end (delta: -186.6 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:02,091 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 624.79 ms. Allocated memory was 147.8 MB in the beginning and 206.6 MB in the end (delta: 58.7 MB). Free memory was 101.7 MB in the beginning and 176.5 MB in the end (delta: -74.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.74 ms. Allocated memory is still 206.6 MB. Free memory was 176.5 MB in the beginning and 172.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1147.05 ms. Allocated memory is still 206.6 MB. Free memory was 172.3 MB in the beginning and 110.1 MB in the end (delta: 62.2 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18461.95 ms. Allocated memory was 206.6 MB in the beginning and 394.3 MB in the end (delta: 187.7 MB). Free memory was 109.5 MB in the beginning and 296.1 MB in the end (delta: -186.6 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 461]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L179] unsigned int Id_MCDC_104; [L180] UINT16 Id_MCDC_105; [L181] UINT16 Id_MCDC_106; [L182] Od_IndexTable* Id_MCDC_107; [L183] Od_IndexTable* Id_MCDC_108; [L184] Od_IndexTable* Id_MCDC_109; [L185] Od_IndexTable* Id_MCDC_110; [L186] Od_IndexTable* Id_MCDC_111; [L187] UINT32 Id_MCDC_112 [4]; [L188] CanOpenNode Id_MCDC_113; [L189] UINT32 Id_MCDC_114=0; [L427] void * Id_MCDC_143; [L428] void * Id_MCDC_144; [L429] void * Id_MCDC_145; [L430] void * Id_MCDC_146; [L431] void * Id_MCDC_147; [L432] void * Id_MCDC_148; [L433] int Id_MCDC_149; [L434] int Id_MCDC_150; [L435] int Id_MCDC_151; [L436] int Id_MCDC_152; [L437] int Id_MCDC_153; [L438] int Id_MCDC_154; [L439] int Id_MCDC_155; [L440] short Id_MCDC_156; [L441] short Id_MCDC_157; [L442] FILE* Id_MCDC_158; [L443] unsigned short Id_MCDC_159; [L444] unsigned short Id_MCDC_160; [L445] unsigned short Id_MCDC_161=0; [L446] unsigned short Id_MCDC_162=0; [L447] char Id_MCDC_163; [L448] char Id_MCDC_164; [L449] Id_MCDC_158 = fopen("in.eds", "r") [L450] COND FALSE !(Id_MCDC_158 == (( void * ) 0)) [L455] CALL Id_MCDC_100() [L420] int Id_MCDC_141; [L421] void * Id_MCDC_142; [L422] CALL Id_MCDC_99() [L400] CHAR Id_MCDC_139 [4]={0, 0, 0, 0}; [L401] UINT32 Id_MCDC_140=0; [L402] Id_MCDC_113.Id_MCDC_66 = ( PDO_Buffer* ) malloc(372) [L403] CALL Id_MCDC_97() [L331] UINT32 Id_MCDC_123; [L332] UINT32 Id_MCDC_124; [L333] UINT32 Id_MCDC_125; [L334] UINT32 Id_MCDC_126; [L335] UINT32 Id_MCDC_127; [L336] UINT32 Id_MCDC_128=0x00; [L337] UINT16 Id_MCDC_129; [L338] UINT32 Id_MCDC_130=0x00; [L339] UINT32 Id_MCDC_131=0x00; [L340] UINT8 Id_MCDC_35=0; [L341] UINT8 Id_MCDC_132=0; [L342] UINT8 Id_MCDC_36=0; [L343] UINT8 Id_MCDC_133=0; [L344] UINT8 Id_MCDC_134=0x00; [L345] INT32 Id_MCDC_135; [L346] void * Id_MCDC_136; [L347] UINT32* Id_MCDC_137; [L348] UINT16 Id_MCDC_138; [L349] Id_MCDC_123 = 0x1800 [L350] Id_MCDC_132 = 0 [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND FALSE !(Id_MCDC_132 < 4) [L354] COND TRUE Id_MCDC_123 <= 0x1803 [L356] Id_MCDC_138 = 0 [L356] COND TRUE Id_MCDC_138 < 4 [L358] Id_MCDC_126 = Id_MCDC_123 [L359] CALL, EXPR Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) [L193] UINT32 Id_MCDC_115=0x80000000; [L194] Od_IndexTable* Id_MCDC_116; [L195] Id_MCDC_116 = Id_MCDC_111 [L196] COND TRUE Id_MCDC_116 == (( void * ) 0) [L198] return 0x08000023; [L359] RET, EXPR Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) [L359] COND TRUE Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) != 0x00 [L361] return 0xFFFF; [L336] UINT32 Id_MCDC_128=0x00; [L361] return 0xFFFF; [L338] UINT32 Id_MCDC_130=0x00; [L361] return 0xFFFF; [L339] UINT32 Id_MCDC_131=0x00; [L361] return 0xFFFF; [L361] return 0xFFFF; [L361] return 0xFFFF; [L403] RET Id_MCDC_97() [L404] Id_MCDC_140 = 0 [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND FALSE !(Id_MCDC_140 < 4) [L415] CALL Id_MCDC_95(4, Id_MCDC_139) [L280] UINT32 Id_MCDC_121=0; [L281] UINT32 Id_MCDC_122=0; [L282] COND FALSE !(Id_MCDC_93 < 2) [L286] COND FALSE !(Id_MCDC_93 != 2) [L292] EXPR Id_MCDC_94[1] [L292] Id_MCDC_122 = Id_MCDC_94[1] [L294] EXPR Id_MCDC_94[0] [L294] CALL, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L249] UINT32 Id_MCDC_117=0; [L250] UINT32 Id_MCDC_118=0; [L251] UINT32 Id_MCDC_119=1; [L252] UINT32 Id_MCDC_120=0; [L253] COND FALSE !(Id_MCDC_90 > Id_MCDC_91) [L259] COND FALSE !(Id_MCDC_90 < Id_MCDC_91) [L266] return Id_MCDC_90; [L294] RET, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L294] Id_MCDC_121 = Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L295] CALL avoid_zero(Id_MCDC_121 != 0) [L9] COND FALSE !(!y) [L295] RET avoid_zero(Id_MCDC_121 != 0) [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295 [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295 [L296] CALL __VERIFIER_assert(( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295) [L459] COND TRUE ! (Id_MCDC_103) [L461] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 18.3s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1494 SDtfs, 2307 SDslu, 1524 SDs, 0 SdLazy, 3926 SolverSat, 486 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 11.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 233 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 551 NumberOfCodeBlocks, 551 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 541 ConstructedInterpolants, 0 QuantifiedInterpolants, 114130 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 105/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...