/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/image_filter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:39:31,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:39:31,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:39:31,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:39:31,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:39:31,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:39:31,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:39:31,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:39:31,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:39:31,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:39:31,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:39:31,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:39:31,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:39:31,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:39:31,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:39:31,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:39:31,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:39:31,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:39:31,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:39:31,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:39:31,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:39:31,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:39:31,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:39:31,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:39:31,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:39:31,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:39:31,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:39:31,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:39:31,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:39:31,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:39:31,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:39:31,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:39:31,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:39:31,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:39:31,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:39:31,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:39:31,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:39:31,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:39:31,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:39:31,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:39:31,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:39:31,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:39:31,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:39:31,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:39:31,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:39:31,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:39:31,604 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:39:31,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:39:31,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:39:31,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:39:31,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:39:31,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:39:31,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:39:31,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:39:31,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:39:31,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:39:31,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:39:31,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:39:31,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:39:31,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:39:31,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:39:31,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:39:31,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:39:31,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:39:31,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:39:31,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:39:31,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:39:31,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:39:31,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:39:31,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:39:31,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:39:31,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:39:32,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:39:32,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:39:32,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:39:32,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:39:32,077 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:39:32,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/image_filter.c [2020-10-27 19:39:32,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073b1099b/c6d6a25194ae4f639a6691363eba7e74/FLAGda22e57aa [2020-10-27 19:39:32,836 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:39:32,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/image_filter.c [2020-10-27 19:39:32,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073b1099b/c6d6a25194ae4f639a6691363eba7e74/FLAGda22e57aa [2020-10-27 19:39:33,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/073b1099b/c6d6a25194ae4f639a6691363eba7e74 [2020-10-27 19:39:33,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:39:33,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:39:33,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:39:33,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:39:33,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:39:33,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93a579f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33, skipping insertion in model container [2020-10-27 19:39:33,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:39:33,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:39:33,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:39:33,630 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:39:33,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:39:33,770 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:39:33,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33 WrapperNode [2020-10-27 19:39:33,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:39:33,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:39:33,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:39:33,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:39:33,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... [2020-10-27 19:39:33,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:39:33,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:39:33,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:39:33,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:39:33,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:39:34,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:39:34,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:39:34,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:39:34,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 19:39:34,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 19:39:34,035 INFO L138 BoogieDeclarations]: Found implementation of procedure blur [2020-10-27 19:39:34,035 INFO L138 BoogieDeclarations]: Found implementation of procedure sobel [2020-10-27 19:39:34,036 INFO L138 BoogieDeclarations]: Found implementation of procedure filter [2020-10-27 19:39:34,036 INFO L138 BoogieDeclarations]: Found implementation of procedure sobelitereen [2020-10-27 19:39:34,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:39:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:39:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:39:34,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:39:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:39:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-27 19:39:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 19:39:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 19:39:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure blur [2020-10-27 19:39:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure sobel [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure filter [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure sobelitereen [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:39:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:39:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:39:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:39:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:39:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:39:38,778 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:39:38,779 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:39:38,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:39:38 BoogieIcfgContainer [2020-10-27 19:39:38,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:39:38,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:39:38,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:39:38,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:39:38,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:39:33" (1/3) ... [2020-10-27 19:39:38,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4753f85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:39:38, skipping insertion in model container [2020-10-27 19:39:38,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:39:33" (2/3) ... [2020-10-27 19:39:38,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4753f85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:39:38, skipping insertion in model container [2020-10-27 19:39:38,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:39:38" (3/3) ... [2020-10-27 19:39:38,791 INFO L111 eAbstractionObserver]: Analyzing ICFG image_filter.c [2020-10-27 19:39:38,804 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:39:38,809 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:39:38,823 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:39:38,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:39:38,852 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:39:38,852 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:39:38,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:39:38,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:39:38,853 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:39:38,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:39:38,853 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:39:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states. [2020-10-27 19:39:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1624 [2020-10-27 19:39:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:39:39,005 INFO L422 BasicCegarLoop]: trace histogram [266, 266, 40, 40, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:39:39,005 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:39:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:39:39,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1713497304, now seen corresponding path program 1 times [2020-10-27 19:39:39,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:39:39,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603578970] [2020-10-27 19:39:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:39:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:39:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking...