/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:52:19,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:52:19,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:52:19,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:52:19,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:52:19,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:52:19,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:52:19,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:52:19,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:52:19,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:52:19,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:52:19,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:52:19,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:52:19,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:52:19,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:52:19,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:52:19,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:52:19,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:52:19,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:52:19,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:52:19,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:52:19,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:52:19,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:52:19,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:52:19,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 10:52:19,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 10:52:19,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 10:52:19,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 10:52:19,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 10:52:19,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 10:52:19,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 10:52:19,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 10:52:19,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 10:52:19,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 10:52:19,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 10:52:19,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 10:52:19,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 10:52:19,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 10:52:19,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:52:19,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:52:19,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:52:19,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:52:19,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:52:19,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:52:19,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:52:19,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:52:19,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:52:19,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:52:19,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:52:19,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:52:19,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:52:19,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:52:19,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:52:19,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:52:19,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:52:19,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:52:19,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:52:19,877 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:52:19,878 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:52:20,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:52:20,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:52:20,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:52:20,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:52:20,061 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:52:20,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2022-01-31 10:52:20,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4f15a678/fb6043f17f994918923a78d14058f5ab/FLAGa94833def [2022-01-31 10:52:20,466 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:52:20,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2022-01-31 10:52:20,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4f15a678/fb6043f17f994918923a78d14058f5ab/FLAGa94833def [2022-01-31 10:52:20,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4f15a678/fb6043f17f994918923a78d14058f5ab [2022-01-31 10:52:20,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:52:20,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:52:20,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:52:20,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:52:20,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:52:20,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:52:20" (1/1) ... [2022-01-31 10:52:20,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da14f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:20, skipping insertion in model container [2022-01-31 10:52:20,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:52:20" (1/1) ... [2022-01-31 10:52:20,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:52:20,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:52:21,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i[809,822] [2022-01-31 10:52:21,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:52:21,093 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:52:21,102 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i[809,822] [2022-01-31 10:52:21,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:52:21,133 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:52:21,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21 WrapperNode [2022-01-31 10:52:21,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:52:21,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:52:21,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:52:21,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:52:21,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:52:21,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:52:21,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:52:21,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:52:21,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:52:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:21,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 10:52:21,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:52:21,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:52:21,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:52:21,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:52:21,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:52:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:52:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:52:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 10:52:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 10:52:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:52:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:52:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:52:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:52:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 10:52:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:52:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 10:52:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:52:21,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 10:52:21,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:52:21,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 10:52:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 10:52:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:52:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:52:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:52:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:52:21,326 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:52:21,328 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:52:21,474 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:52:21,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:52:21,478 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 10:52:21,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:52:21 BoogieIcfgContainer [2022-01-31 10:52:21,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:52:21,480 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:52:21,480 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:52:21,481 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:52:21,482 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:52:21" (1/1) ... [2022-01-31 10:52:21,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:52:21 BasicIcfg [2022-01-31 10:52:21,494 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:52:21,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:52:21,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:52:21,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:52:21,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:52:20" (1/4) ... [2022-01-31 10:52:21,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32000528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:52:21, skipping insertion in model container [2022-01-31 10:52:21,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:21" (2/4) ... [2022-01-31 10:52:21,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32000528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:52:21, skipping insertion in model container [2022-01-31 10:52:21,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:52:21" (3/4) ... [2022-01-31 10:52:21,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32000528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:52:21, skipping insertion in model container [2022-01-31 10:52:21,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:52:21" (4/4) ... [2022-01-31 10:52:21,499 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.iJordan [2022-01-31 10:52:21,502 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:52:21,503 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:52:21,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:52:21,536 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 10:52:21,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:52:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:52:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 10:52:21,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:21,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:21,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2135573460, now seen corresponding path program 1 times [2022-01-31 10:52:21,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402840253] [2022-01-31 10:52:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:21,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:21,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:21,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402840253] [2022-01-31 10:52:21,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402840253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:52:21,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:52:21,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:52:21,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583242701] [2022-01-31 10:52:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:52:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:52:21,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:52:21,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:52:21,776 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:52:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:21,842 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-01-31 10:52:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:52:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 10:52:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:21,849 INFO L225 Difference]: With dead ends: 36 [2022-01-31 10:52:21,849 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 10:52:21,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:52:21,853 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:21,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:52:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 10:52:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-01-31 10:52:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-31 10:52:21,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2022-01-31 10:52:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:21,884 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-31 10:52:21,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:52:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-31 10:52:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 10:52:21,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:21,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:21,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:52:21,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 351939373, now seen corresponding path program 1 times [2022-01-31 10:52:21,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:21,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525510070] [2022-01-31 10:52:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:21,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:22,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:22,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525510070] [2022-01-31 10:52:22,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525510070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:52:22,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:52:22,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:52:22,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831873632] [2022-01-31 10:52:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:52:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:52:22,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:52:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:52:22,037 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:52:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:22,159 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2022-01-31 10:52:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 10:52:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 10:52:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:22,162 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:52:22,163 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 10:52:22,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:52:22,164 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:22,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 39 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:52:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 10:52:22,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2022-01-31 10:52:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-31 10:52:22,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-01-31 10:52:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:22,169 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-31 10:52:22,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:52:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-31 10:52:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:52:22,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:22,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:22,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:52:22,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:22,171 INFO L85 PathProgramCache]: Analyzing trace with hash 255106634, now seen corresponding path program 1 times [2022-01-31 10:52:22,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:22,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829692943] [2022-01-31 10:52:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:22,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:22,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:22,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829692943] [2022-01-31 10:52:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829692943] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:52:22,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:52:22,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:52:22,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844079944] [2022-01-31 10:52:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:52:22,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:52:22,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:52:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:52:22,222 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:52:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:22,276 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-01-31 10:52:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 10:52:22,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 10:52:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:22,278 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:52:22,278 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 10:52:22,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:52:22,279 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:22,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:52:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 10:52:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2022-01-31 10:52:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-01-31 10:52:22,282 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2022-01-31 10:52:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:22,283 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-01-31 10:52:22,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:52:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-01-31 10:52:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:52:22,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:22,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:22,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 10:52:22,284 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -38296373, now seen corresponding path program 1 times [2022-01-31 10:52:22,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:22,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306015278] [2022-01-31 10:52:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:22,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:22,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306015278] [2022-01-31 10:52:22,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306015278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759231275] [2022-01-31 10:52:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:22,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:22,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:22,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:22,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 10:52:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 10:52:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:52:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:22,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:52:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:22,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759231275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:52:22,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:52:22,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-31 10:52:22,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950785106] [2022-01-31 10:52:22,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:52:22,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 10:52:22,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 10:52:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 10:52:22,564 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:22,685 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2022-01-31 10:52:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:52:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 10:52:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:22,687 INFO L225 Difference]: With dead ends: 69 [2022-01-31 10:52:22,687 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 10:52:22,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:52:22,688 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:22,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 88 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:52:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 10:52:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-01-31 10:52:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-01-31 10:52:22,693 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 20 [2022-01-31 10:52:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:22,693 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-01-31 10:52:22,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-01-31 10:52:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 10:52:22,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:22,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:22,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 10:52:22,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:22,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2026135725, now seen corresponding path program 2 times [2022-01-31 10:52:22,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:22,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344969150] [2022-01-31 10:52:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:22,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:23,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:23,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344969150] [2022-01-31 10:52:23,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344969150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:23,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361296787] [2022-01-31 10:52:23,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:52:23,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:23,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:23,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:23,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 10:52:23,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:52:23,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:52:23,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:52:23,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:52:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:23,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:52:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361296787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:52:23,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:52:23,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-01-31 10:52:23,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044627443] [2022-01-31 10:52:23,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:52:23,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 10:52:23,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 10:52:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:52:23,355 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:23,604 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2022-01-31 10:52:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 10:52:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-01-31 10:52:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:23,605 INFO L225 Difference]: With dead ends: 147 [2022-01-31 10:52:23,606 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 10:52:23,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=421, Unknown=0, NotChecked=0, Total=650 [2022-01-31 10:52:23,606 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 399 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:23,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 163 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:52:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 10:52:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2022-01-31 10:52:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 84 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2022-01-31 10:52:23,613 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 35 [2022-01-31 10:52:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:23,614 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2022-01-31 10:52:23,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2022-01-31 10:52:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 10:52:23,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:23,615 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:23,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 10:52:23,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:23,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash -773560083, now seen corresponding path program 3 times [2022-01-31 10:52:23,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:23,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171022399] [2022-01-31 10:52:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:23,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:24,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:24,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:24,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171022399] [2022-01-31 10:52:24,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171022399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:24,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549970276] [2022-01-31 10:52:24,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:52:24,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:24,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:24,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:52:24,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 10:52:24,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:52:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:52:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:52:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:25,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:52:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:25,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549970276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:52:25,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:52:25,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2022-01-31 10:52:25,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635724890] [2022-01-31 10:52:25,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:52:25,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 10:52:25,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 10:52:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=777, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 10:52:25,386 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand has 37 states, 37 states have (on average 4.513513513513513) internal successors, (167), 36 states have internal predecessors, (167), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:25,928 INFO L93 Difference]: Finished difference Result 303 states and 436 transitions. [2022-01-31 10:52:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 10:52:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.513513513513513) internal successors, (167), 36 states have internal predecessors, (167), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2022-01-31 10:52:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:25,933 INFO L225 Difference]: With dead ends: 303 [2022-01-31 10:52:25,933 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 10:52:25,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 10:52:25,936 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1084 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:25,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 356 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:52:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 10:52:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 174. [2022-01-31 10:52:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.4166666666666667) internal successors, (238), 168 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 243 transitions. [2022-01-31 10:52:25,959 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 243 transitions. Word has length 65 [2022-01-31 10:52:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:25,960 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 243 transitions. [2022-01-31 10:52:25,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.513513513513513) internal successors, (167), 36 states have internal predecessors, (167), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 243 transitions. [2022-01-31 10:52:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 10:52:25,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:25,963 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:25,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:52:26,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:26,187 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash 654616941, now seen corresponding path program 4 times [2022-01-31 10:52:26,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:26,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102890870] [2022-01-31 10:52:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:26,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:26,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:26,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102890870] [2022-01-31 10:52:26,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102890870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:26,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364487134] [2022-01-31 10:52:26,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:52:26,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:26,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:26,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:26,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:52:27,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:52:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:52:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 10:52:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:52:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:28,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:52:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:29,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364487134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:52:29,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:52:29,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 73 [2022-01-31 10:52:29,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048620896] [2022-01-31 10:52:29,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:52:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 10:52:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 10:52:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2259, Invalid=2997, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 10:52:29,415 INFO L87 Difference]: Start difference. First operand 174 states and 243 transitions. Second operand has 73 states, 73 states have (on average 4.7534246575342465) internal successors, (347), 72 states have internal predecessors, (347), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:31,130 INFO L93 Difference]: Finished difference Result 615 states and 892 transitions. [2022-01-31 10:52:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 10:52:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.7534246575342465) internal successors, (347), 72 states have internal predecessors, (347), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-01-31 10:52:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:31,133 INFO L225 Difference]: With dead ends: 615 [2022-01-31 10:52:31,133 INFO L226 Difference]: Without dead ends: 615 [2022-01-31 10:52:31,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3487, Invalid=6019, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 10:52:31,136 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2077 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:31,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2100 Valid, 695 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:52:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-31 10:52:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 342. [2022-01-31 10:52:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:52:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 483 transitions. [2022-01-31 10:52:31,149 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 483 transitions. Word has length 125 [2022-01-31 10:52:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:31,150 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 483 transitions. [2022-01-31 10:52:31,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.7534246575342465) internal successors, (347), 72 states have internal predecessors, (347), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:52:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 483 transitions. [2022-01-31 10:52:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 10:52:31,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:31,153 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:31,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:52:31,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:31,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1245047405, now seen corresponding path program 5 times [2022-01-31 10:52:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239922855] [2022-01-31 10:52:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:31,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:52:32,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:32,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239922855] [2022-01-31 10:52:32,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239922855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:32,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704915071] [2022-01-31 10:52:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:52:32,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:32,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:32,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process