/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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:51:53,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:51:53,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:51:53,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:51:53,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:51:53,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:51:53,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:51:53,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:51:53,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:51:53,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:51:53,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:51:53,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:51:53,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:51:53,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:51:53,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:51:53,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:51:53,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:51:53,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:51:53,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:51:53,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:51:53,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:51:53,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:51:53,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:51:53,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:51:53,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:51:53,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:51:53,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:51:53,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:51:53,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:51:53,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:51:53,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:51:53,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:51:53,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:51:53,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:51:53,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:51:53,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:51:53,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:51:53,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:51:53,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:51:53,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:51:53,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:51:53,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:51:53,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:51:53,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:51:53,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:51:53,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:51:53,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:51:53,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:51:53,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:51:53,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:51:53,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:51:53,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:51:53,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:51:53,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:51:53,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:51:53,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:51:53,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:51:53,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:51:53,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:51:53,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:51:53,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:53,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:51:53,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:51:53,247 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:51:53,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:51:53,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:51:53,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:51:53,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:51:53,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:51:53,570 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:51:53,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2021-05-02 17:51:53,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20eb39f9/1a899099dabd4276b8397335c53f26bf/FLAGd8ef0ce64 [2021-05-02 17:51:54,088 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:51:54,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2021-05-02 17:51:54,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20eb39f9/1a899099dabd4276b8397335c53f26bf/FLAGd8ef0ce64 [2021-05-02 17:51:54,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20eb39f9/1a899099dabd4276b8397335c53f26bf [2021-05-02 17:51:54,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:51:54,515 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:51:54,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:54,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:51:54,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:51:54,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a9397c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54, skipping insertion in model container [2021-05-02 17:51:54,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:51:54,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:51:54,638 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2021-05-02 17:51:54,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:54,653 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:51:54,665 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2021-05-02 17:51:54,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:54,680 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:51:54,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54 WrapperNode [2021-05-02 17:51:54,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:54,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:51:54,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:51:54,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:51:54,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... [2021-05-02 17:51:54,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:51:54,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:51:54,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:51:54,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:51:54,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-05-02 17:51:54,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:51:54,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:51:54,842 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:51:54,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:51:54,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:51:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:51:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:51:54,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:51:54,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:51:54,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:51:54,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:51:54,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:51:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:51:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:51:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:51:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:51:54,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:51:54,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:51:54,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:51:54,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:51:55,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:51:55,135 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 17:51:55,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:55 BoogieIcfgContainer [2021-05-02 17:51:55,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:51:55,137 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:51:55,137 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:51:55,138 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:51:55,140 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:55" (1/1) ... [2021-05-02 17:51:55,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:55 BasicIcfg [2021-05-02 17:51:55,174 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:51:55,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:51:55,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:51:55,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:51:55,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:51:54" (1/4) ... [2021-05-02 17:51:55,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb6614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:55, skipping insertion in model container [2021-05-02 17:51:55,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:54" (2/4) ... [2021-05-02 17:51:55,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb6614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:55, skipping insertion in model container [2021-05-02 17:51:55,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:55" (3/4) ... [2021-05-02 17:51:55,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb6614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:55, skipping insertion in model container [2021-05-02 17:51:55,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:55" (4/4) ... [2021-05-02 17:51:55,181 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.iJordan [2021-05-02 17:51:55,187 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:51:55,192 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:51:55,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:51:55,230 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:51:55,230 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:51:55,230 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:51:55,230 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:51:55,230 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:51:55,230 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:51:55,230 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:51:55,230 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:51:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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) [2021-05-02 17:51:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 17:51:55,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:55,256 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:55,256 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1043605578, now seen corresponding path program 1 times [2021-05-02 17:51:55,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136176411] [2021-05-02 17:51:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136176411] [2021-05-02 17:51:55,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136176411] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:55,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:55,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:51:55,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627645905] [2021-05-02 17:51:55,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:51:55,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:55,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:51:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:55,545 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-05-02 17:51:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:55,634 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-05-02 17:51:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:51:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2021-05-02 17:51:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:55,643 INFO L225 Difference]: With dead ends: 25 [2021-05-02 17:51:55,643 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 17:51:55,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 17:51:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 17:51:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-05-02 17:51:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 17:51:55,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-05-02 17:51:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:55,672 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 17:51:55,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-05-02 17:51:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 17:51:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:51:55,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:55,673 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:55,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:51:55,673 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash -637810695, now seen corresponding path program 1 times [2021-05-02 17:51:55,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:55,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447923098] [2021-05-02 17:51:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447923098] [2021-05-02 17:51:55,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447923098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:55,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:55,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:51:55,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239054024] [2021-05-02 17:51:55,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:51:55,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:51:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:55,766 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-05-02 17:51:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:55,853 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-05-02 17:51:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:51:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2021-05-02 17:51:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:55,871 INFO L225 Difference]: With dead ends: 25 [2021-05-02 17:51:55,871 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:51:55,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:51:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-05-02 17:51:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-05-02 17:51:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 17:51:55,875 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-02 17:51:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:55,875 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 17:51:55,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-05-02 17:51:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 17:51:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:51:55,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:55,876 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:55,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:51:55,877 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash -693433385, now seen corresponding path program 1 times [2021-05-02 17:51:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225874079] [2021-05-02 17:51:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225874079] [2021-05-02 17:51:55,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225874079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262552758] [2021-05-02 17:51:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:51:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:56,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:56,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262552758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:56,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:56,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:51:56,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432848964] [2021-05-02 17:51:56,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:56,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:56,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:56,183 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:56,275 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-02 17:51:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:51:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 17:51:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:56,279 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:51:56,279 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:51:56,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:51:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2021-05-02 17:51:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-05-02 17:51:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-02 17:51:56,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-05-02 17:51:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:56,286 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-02 17:51:56,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-02 17:51:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 17:51:56,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:56,288 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:56,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:51:56,513 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1687736373, now seen corresponding path program 2 times [2021-05-02 17:51:56,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:56,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196020038] [2021-05-02 17:51:56,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:51:56,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:56,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196020038] [2021-05-02 17:51:56,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196020038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:56,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:56,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:51:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358745558] [2021-05-02 17:51:56,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:56,672 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-05-02 17:51:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:56,776 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 17:51:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:51:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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 19 [2021-05-02 17:51:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:56,778 INFO L225 Difference]: With dead ends: 28 [2021-05-02 17:51:56,778 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:51:56,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:51:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 17:51:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-05-02 17:51:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:51:56,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-02 17:51:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:56,782 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:51:56,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-05-02 17:51:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:51:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 17:51:56,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:56,783 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:56,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 17:51:56,783 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:56,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1284612656, now seen corresponding path program 1 times [2021-05-02 17:51:56,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:56,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501965980] [2021-05-02 17:51:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:51:56,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:56,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501965980] [2021-05-02 17:51:56,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501965980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:56,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339091489] [2021-05-02 17:51:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:51:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:56,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 17:51:57,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339091489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:57,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-05-02 17:51:57,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907969184] [2021-05-02 17:51:57,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:51:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:51:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:57,020 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:57,155 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-05-02 17:51:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:51:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 17:51:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:57,157 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:51:57,158 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 17:51:57,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 17:51:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-02 17:51:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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) [2021-05-02 17:51:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 17:51:57,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-05-02 17:51:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:57,176 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 17:51:57,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 17:51:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 17:51:57,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:57,178 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:57,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:57,379 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1564659612, now seen corresponding path program 2 times [2021-05-02 17:51:57,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:57,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403075275] [2021-05-02 17:51:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 17:51:57,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:57,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403075275] [2021-05-02 17:51:57,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403075275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317661786] [2021-05-02 17:51:57,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:57,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:57,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:57,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:51:57,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 17:51:57,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317661786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:57,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:51:57,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744347863] [2021-05-02 17:51:57,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:51:57,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:57,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:51:57,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:57,635 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:57,717 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-05-02 17:51:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:51:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 17:51:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:57,719 INFO L225 Difference]: With dead ends: 43 [2021-05-02 17:51:57,719 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 17:51:57,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 17:51:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-05-02 17:51:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2021-05-02 17:51:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-02 17:51:57,726 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2021-05-02 17:51:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:57,726 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-02 17:51:57,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-02 17:51:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 17:51:57,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:57,727 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:57,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:57,941 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1661106370, now seen corresponding path program 3 times [2021-05-02 17:51:57,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:57,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700892105] [2021-05-02 17:51:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 17:51:58,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700892105] [2021-05-02 17:51:58,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700892105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381814304] [2021-05-02 17:51:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:58,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:51:58,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:51:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:58,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:51:58,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381814304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:58,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-02 17:51:58,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784293707] [2021-05-02 17:51:58,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:51:58,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:51:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:58,267 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,405 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-05-02 17:51:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:51:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 17:51:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,406 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:51:58,406 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:51:58,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:51:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:51:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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) [2021-05-02 17:51:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 17:51:58,410 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2021-05-02 17:51:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,410 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 17:51:58,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 17:51:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 17:51:58,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,411 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:58,625 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1601526870, now seen corresponding path program 4 times [2021-05-02 17:51:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764906228] [2021-05-02 17:51:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:51:58,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764906228] [2021-05-02 17:51:58,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764906228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143881779] [2021-05-02 17:51:58,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:58,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:58,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:58,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:51:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:58,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:51:58,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143881779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:58,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:51:58,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300104698] [2021-05-02 17:51:58,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:51:58,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:51:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:58,880 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,963 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-05-02 17:51:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:51:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 17:51:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,964 INFO L225 Difference]: With dead ends: 55 [2021-05-02 17:51:58,964 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 17:51:58,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 17:51:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-05-02 17:51:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 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) [2021-05-02 17:51:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 17:51:58,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 45 [2021-05-02 17:51:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,968 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 17:51:58,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 17:51:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:51:58,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,969 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:59,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:59,177 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1311442868, now seen corresponding path program 5 times [2021-05-02 17:51:59,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:59,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672374235] [2021-05-02 17:51:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:51:59,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672374235] [2021-05-02 17:51:59,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672374235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104505900] [2021-05-02 17:51:59,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:59,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 17:51:59,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:51:59,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:59,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:51:59,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104505900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:59,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:51:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786237835] [2021-05-02 17:51:59,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:51:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:51:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:59,505 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:59,594 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-05-02 17:51:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:51:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 17:51:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:59,595 INFO L225 Difference]: With dead ends: 62 [2021-05-02 17:51:59,595 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 17:51:59,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 17:51:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-05-02 17:51:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 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) [2021-05-02 17:51:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 17:51:59,605 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 47 [2021-05-02 17:51:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:59,605 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 17:51:59,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 17:51:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 17:51:59,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:59,606 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:59,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:59,807 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1713591186, now seen corresponding path program 6 times [2021-05-02 17:51:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:59,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205293157] [2021-05-02 17:51:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:51:59,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205293157] [2021-05-02 17:51:59,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205293157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734381696] [2021-05-02 17:51:59,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:00,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-02 17:52:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:52:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:00,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:52:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734381696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:00,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:52:00,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355907756] [2021-05-02 17:52:00,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:52:00,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:52:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:52:00,141 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:00,233 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2021-05-02 17:52:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:52:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 17:52:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:00,234 INFO L225 Difference]: With dead ends: 69 [2021-05-02 17:52:00,234 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 17:52:00,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:52:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 17:52:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-05-02 17:52:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 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) [2021-05-02 17:52:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-05-02 17:52:00,238 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 49 [2021-05-02 17:52:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:00,238 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-05-02 17:52:00,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-05-02 17:52:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:52:00,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:00,239 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:00,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:52:00,453 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1631068144, now seen corresponding path program 7 times [2021-05-02 17:52:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:00,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139445667] [2021-05-02 17:52:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:52:00,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:00,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139445667] [2021-05-02 17:52:00,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139445667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892081714] [2021-05-02 17:52:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:52:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:00,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:52:00,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892081714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:00,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 17:52:00,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481014444] [2021-05-02 17:52:00,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:52:00,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:52:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:52:00,728 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:00,821 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-05-02 17:52:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:52:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 17:52:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:00,822 INFO L225 Difference]: With dead ends: 76 [2021-05-02 17:52:00,822 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 17:52:00,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:52:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 17:52:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-05-02 17:52:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-05-02 17:52:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 17:52:00,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 51 [2021-05-02 17:52:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:00,826 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 17:52:00,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 17:52:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 17:52:00,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:00,827 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:01,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 17:52:01,050 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -364163890, now seen corresponding path program 8 times [2021-05-02 17:52:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:01,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789328547] [2021-05-02 17:52:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:52:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789328547] [2021-05-02 17:52:01,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789328547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808612413] [2021-05-02 17:52:01,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:01,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:01,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 17:52:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:01,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:52:01,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808612413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:01,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 17:52:01,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639319053] [2021-05-02 17:52:01,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 17:52:01,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 17:52:01,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:52:01,378 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:01,486 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-05-02 17:52:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:52:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 17:52:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:01,487 INFO L225 Difference]: With dead ends: 83 [2021-05-02 17:52:01,488 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 17:52:01,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:52:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 17:52:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-05-02 17:52:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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) [2021-05-02 17:52:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 17:52:01,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 53 [2021-05-02 17:52:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:01,491 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 17:52:01,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 17:52:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 17:52:01,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:01,492 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:01,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:01,715 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2068232748, now seen corresponding path program 9 times [2021-05-02 17:52:01,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:01,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799225073] [2021-05-02 17:52:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 17:52:01,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:01,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799225073] [2021-05-02 17:52:01,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799225073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514642087] [2021-05-02 17:52:01,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:01,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 17:52:01,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:52:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 17:52:02,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514642087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:02,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 17 [2021-05-02 17:52:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152963122] [2021-05-02 17:52:02,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:52:02,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:52:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:52:02,035 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 15 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:02,205 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-05-02 17:52:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:52:02,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 15 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 17:52:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:02,207 INFO L225 Difference]: With dead ends: 92 [2021-05-02 17:52:02,207 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 17:52:02,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:52:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 17:52:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-05-02 17:52:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 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) [2021-05-02 17:52:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-05-02 17:52:02,211 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 55 [2021-05-02 17:52:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:02,211 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-05-02 17:52:02,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 15 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-05-02 17:52:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 17:52:02,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:02,212 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:02,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:02,436 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:02,436 INFO L82 PathProgramCache]: Analyzing trace with hash -780036052, now seen corresponding path program 10 times [2021-05-02 17:52:02,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:02,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736131002] [2021-05-02 17:52:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:02,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736131002] [2021-05-02 17:52:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736131002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47709924] [2021-05-02 17:52:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:02,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 17:52:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:02,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47709924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:02,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 17:52:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034909564] [2021-05-02 17:52:02,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:52:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:52:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:52:02,833 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:02,963 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-05-02 17:52:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 17:52:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 17:52:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:02,964 INFO L225 Difference]: With dead ends: 91 [2021-05-02 17:52:02,964 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 17:52:02,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:52:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 17:52:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2021-05-02 17:52:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 79 states have internal predecessors, (93), 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) [2021-05-02 17:52:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-05-02 17:52:02,967 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 81 [2021-05-02 17:52:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:02,967 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-05-02 17:52:02,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-05-02 17:52:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 17:52:02,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:02,969 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:03,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:52:03,185 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1684181878, now seen corresponding path program 11 times [2021-05-02 17:52:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293908285] [2021-05-02 17:52:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:03,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:03,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293908285] [2021-05-02 17:52:03,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293908285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109058691] [2021-05-02 17:52:03,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:03,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-02 17:52:03,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:52:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:03,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109058691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:03,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 17:52:03,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327371530] [2021-05-02 17:52:03,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:52:03,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:52:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:52:03,733 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:03,851 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-05-02 17:52:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:52:03,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 17:52:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:03,852 INFO L225 Difference]: With dead ends: 98 [2021-05-02 17:52:03,852 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 17:52:03,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:52:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 17:52:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-05-02 17:52:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 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) [2021-05-02 17:52:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-05-02 17:52:03,856 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 83 [2021-05-02 17:52:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:03,856 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-05-02 17:52:03,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-05-02 17:52:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 17:52:03,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:03,857 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:04,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:52:04,081 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1310040424, now seen corresponding path program 12 times [2021-05-02 17:52:04,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:04,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344716026] [2021-05-02 17:52:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:04,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:04,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344716026] [2021-05-02 17:52:04,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344716026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116742583] [2021-05-02 17:52:04,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:04,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-02 17:52:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:52:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116742583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:04,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 17:52:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633781934] [2021-05-02 17:52:04,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 17:52:04,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 17:52:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:52:04,632 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:04,759 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2021-05-02 17:52:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:52:04,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 17:52:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:04,761 INFO L225 Difference]: With dead ends: 105 [2021-05-02 17:52:04,761 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 17:52:04,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:52:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 17:52:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-05-02 17:52:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 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) [2021-05-02 17:52:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 17:52:04,764 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 85 [2021-05-02 17:52:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:04,764 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 17:52:04,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 17:52:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 17:52:04,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:04,765 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:04,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 17:52:04,981 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:04,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1129584326, now seen corresponding path program 13 times [2021-05-02 17:52:04,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:04,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530818597] [2021-05-02 17:52:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:05,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530818597] [2021-05-02 17:52:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530818597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876898624] [2021-05-02 17:52:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 17:52:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:05,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:05,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876898624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:05,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 17:52:05,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966086718] [2021-05-02 17:52:05,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 17:52:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 17:52:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:52:05,366 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:05,520 INFO L93 Difference]: Finished difference Result 112 states and 133 transitions. [2021-05-02 17:52:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 17:52:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 17:52:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:05,521 INFO L225 Difference]: With dead ends: 112 [2021-05-02 17:52:05,521 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 17:52:05,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:52:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 17:52:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2021-05-02 17:52:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 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) [2021-05-02 17:52:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2021-05-02 17:52:05,524 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 87 [2021-05-02 17:52:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:05,524 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2021-05-02 17:52:05,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2021-05-02 17:52:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 17:52:05,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:05,525 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:05,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:05,737 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash -490034012, now seen corresponding path program 14 times [2021-05-02 17:52:05,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:05,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591843452] [2021-05-02 17:52:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:05,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:05,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591843452] [2021-05-02 17:52:05,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591843452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329742434] [2021-05-02 17:52:05,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:06,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:06,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:52:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:06,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329742434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:06,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 17:52:06,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691906430] [2021-05-02 17:52:06,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 17:52:06,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 17:52:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:52:06,149 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:06,298 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2021-05-02 17:52:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:52:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 17:52:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:06,301 INFO L225 Difference]: With dead ends: 119 [2021-05-02 17:52:06,301 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 17:52:06,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:52:06,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 17:52:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-05-02 17:52:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.160919540229885) internal successors, (101), 87 states have internal predecessors, (101), 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) [2021-05-02 17:52:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-05-02 17:52:06,304 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 89 [2021-05-02 17:52:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:06,304 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-05-02 17:52:06,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-05-02 17:52:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 17:52:06,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:06,305 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:06,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:52:06,528 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2129871618, now seen corresponding path program 15 times [2021-05-02 17:52:06,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:06,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828698339] [2021-05-02 17:52:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 17:52:06,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:06,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828698339] [2021-05-02 17:52:06,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828698339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071778416] [2021-05-02 17:52:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:06,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 17:52:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:52:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 17:52:07,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071778416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:07,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 23 [2021-05-02 17:52:07,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215219161] [2021-05-02 17:52:07,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:52:07,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:07,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:52:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:52:07,072 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 21 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:07,287 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2021-05-02 17:52:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:52:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 21 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 17:52:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:07,288 INFO L225 Difference]: With dead ends: 128 [2021-05-02 17:52:07,288 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 17:52:07,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:52:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 17:52:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2021-05-02 17:52:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.176991150442478) internal successors, (133), 113 states have internal predecessors, (133), 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) [2021-05-02 17:52:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2021-05-02 17:52:07,291 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 91 [2021-05-02 17:52:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:07,291 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2021-05-02 17:52:07,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 21 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2021-05-02 17:52:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 17:52:07,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:07,293 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:07,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:07,509 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash -216897534, now seen corresponding path program 16 times [2021-05-02 17:52:07,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:07,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056672918] [2021-05-02 17:52:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:07,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:07,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:07,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056672918] [2021-05-02 17:52:07,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056672918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998466348] [2021-05-02 17:52:07,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:07,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:07,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:07,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:52:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:07,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998466348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:07,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 17:52:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866337249] [2021-05-02 17:52:07,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:52:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:52:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:52:07,996 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:08,153 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2021-05-02 17:52:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:52:08,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 17:52:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:08,154 INFO L225 Difference]: With dead ends: 127 [2021-05-02 17:52:08,155 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 17:52:08,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:52:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 17:52:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-05-02 17:52:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.173913043478261) internal successors, (135), 115 states have internal predecessors, (135), 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) [2021-05-02 17:52:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2021-05-02 17:52:08,160 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 117 [2021-05-02 17:52:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:08,160 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2021-05-02 17:52:08,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:08,160 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2021-05-02 17:52:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 17:52:08,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:08,161 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:08,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:08,377 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1047782752, now seen corresponding path program 17 times [2021-05-02 17:52:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:08,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400258952] [2021-05-02 17:52:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:08,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:08,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400258952] [2021-05-02 17:52:08,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400258952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709949855] [2021-05-02 17:52:08,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:08,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-02 17:52:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:52:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:09,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709949855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:09,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 17:52:09,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537951817] [2021-05-02 17:52:09,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:52:09,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:52:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:52:09,155 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:09,330 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-05-02 17:52:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:52:09,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 17:52:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:09,331 INFO L225 Difference]: With dead ends: 134 [2021-05-02 17:52:09,331 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 17:52:09,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:52:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 17:52:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-05-02 17:52:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.170940170940171) internal successors, (137), 117 states have internal predecessors, (137), 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) [2021-05-02 17:52:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-05-02 17:52:09,334 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2021-05-02 17:52:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:09,334 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-05-02 17:52:09,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-05-02 17:52:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 17:52:09,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:09,335 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:09,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 17:52:09,554 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 929792830, now seen corresponding path program 18 times [2021-05-02 17:52:09,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:09,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617595851] [2021-05-02 17:52:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:09,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:09,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617595851] [2021-05-02 17:52:09,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617595851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62621590] [2021-05-02 17:52:09,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:10,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-02 17:52:10,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 17:52:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:10,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:10,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62621590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:10,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:10,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 17:52:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908391478] [2021-05-02 17:52:10,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:52:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:52:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:52:10,628 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:10,821 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2021-05-02 17:52:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:52:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-02 17:52:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:10,823 INFO L225 Difference]: With dead ends: 141 [2021-05-02 17:52:10,823 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 17:52:10,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:52:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 17:52:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 124. [2021-05-02 17:52:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 119 states have internal predecessors, (139), 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) [2021-05-02 17:52:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2021-05-02 17:52:10,828 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 121 [2021-05-02 17:52:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:10,828 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2021-05-02 17:52:10,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2021-05-02 17:52:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 17:52:10,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:10,830 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:11,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:11,055 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash -789372516, now seen corresponding path program 19 times [2021-05-02 17:52:11,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:11,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571063714] [2021-05-02 17:52:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:11,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571063714] [2021-05-02 17:52:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571063714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114596613] [2021-05-02 17:52:11,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:52:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:11,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114596613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 17:52:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168156212] [2021-05-02 17:52:11,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:52:11,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:52:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:52:11,622 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:11,785 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2021-05-02 17:52:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 17:52:11,785 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 17:52:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:11,788 INFO L225 Difference]: With dead ends: 148 [2021-05-02 17:52:11,788 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 17:52:11,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:52:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 17:52:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2021-05-02 17:52:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 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) [2021-05-02 17:52:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2021-05-02 17:52:11,791 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 123 [2021-05-02 17:52:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:11,791 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2021-05-02 17:52:11,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2021-05-02 17:52:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 17:52:11,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:11,792 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:12,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 17:52:12,001 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:12,001 INFO L82 PathProgramCache]: Analyzing trace with hash 655138938, now seen corresponding path program 20 times [2021-05-02 17:52:12,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:12,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043038252] [2021-05-02 17:52:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:12,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:12,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:12,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043038252] [2021-05-02 17:52:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043038252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:12,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777313899] [2021-05-02 17:52:12,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:12,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:52:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:12,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:12,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777313899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:12,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:12,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 17:52:12,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756007324] [2021-05-02 17:52:12,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 17:52:12,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 17:52:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:52:12,561 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:12,746 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2021-05-02 17:52:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:52:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 17:52:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:12,748 INFO L225 Difference]: With dead ends: 155 [2021-05-02 17:52:12,748 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 17:52:12,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:52:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 17:52:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 128. [2021-05-02 17:52:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 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) [2021-05-02 17:52:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2021-05-02 17:52:12,751 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 125 [2021-05-02 17:52:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:12,751 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2021-05-02 17:52:12,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2021-05-02 17:52:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 17:52:12,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:12,752 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:12,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 17:52:12,976 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1556209624, now seen corresponding path program 21 times [2021-05-02 17:52:12,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:12,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787427244] [2021-05-02 17:52:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:13,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 17:52:13,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787427244] [2021-05-02 17:52:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787427244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045855831] [2021-05-02 17:52:13,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:13,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-02 17:52:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:52:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:13,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 17:52:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045855831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:13,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:13,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 29 [2021-05-02 17:52:13,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108957632] [2021-05-02 17:52:13,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:52:13,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:52:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:13,764 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 27 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:14,023 INFO L93 Difference]: Finished difference Result 164 states and 194 transitions. [2021-05-02 17:52:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:52:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 27 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 17:52:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:14,024 INFO L225 Difference]: With dead ends: 164 [2021-05-02 17:52:14,024 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 17:52:14,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 17:52:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-02 17:52:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.174496644295302) internal successors, (175), 149 states have internal predecessors, (175), 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) [2021-05-02 17:52:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2021-05-02 17:52:14,027 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 127 [2021-05-02 17:52:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:14,028 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2021-05-02 17:52:14,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 27 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2021-05-02 17:52:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 17:52:14,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:14,029 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:14,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:14,245 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1127691304, now seen corresponding path program 22 times [2021-05-02 17:52:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:14,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92038188] [2021-05-02 17:52:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 17:52:14,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:14,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92038188] [2021-05-02 17:52:14,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92038188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:14,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408092423] [2021-05-02 17:52:14,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:14,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:14,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:14,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 17:52:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 17:52:14,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408092423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:14,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:14,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 17:52:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561191816] [2021-05-02 17:52:14,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:52:14,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:52:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:52:14,898 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:15,128 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2021-05-02 17:52:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:52:15,128 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 17:52:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:15,129 INFO L225 Difference]: With dead ends: 163 [2021-05-02 17:52:15,129 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 17:52:15,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:52:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 17:52:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2021-05-02 17:52:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.1721854304635762) internal successors, (177), 151 states have internal predecessors, (177), 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) [2021-05-02 17:52:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 181 transitions. [2021-05-02 17:52:15,133 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 181 transitions. Word has length 153 [2021-05-02 17:52:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:15,133 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 181 transitions. [2021-05-02 17:52:15,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 181 transitions. [2021-05-02 17:52:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 17:52:15,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:15,134 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:15,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 17:52:15,359 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:15,359 INFO L82 PathProgramCache]: Analyzing trace with hash -712019402, now seen corresponding path program 23 times [2021-05-02 17:52:15,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:15,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786781330] [2021-05-02 17:52:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:15,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 17:52:15,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:15,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786781330] [2021-05-02 17:52:15,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786781330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:15,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720767727] [2021-05-02 17:52:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:17,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-02 17:52:17,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:17,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:52:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:17,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 17:52:17,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720767727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:17,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:17,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 17:52:17,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102707941] [2021-05-02 17:52:17,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:52:17,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:17,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:52:17,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:17,654 INFO L87 Difference]: Start difference. First operand 156 states and 181 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:17,912 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2021-05-02 17:52:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:52:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 17:52:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:17,919 INFO L225 Difference]: With dead ends: 170 [2021-05-02 17:52:17,919 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 17:52:17,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 17:52:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 158. [2021-05-02 17:52:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 153 states have internal predecessors, (179), 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) [2021-05-02 17:52:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-05-02 17:52:17,926 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 155 [2021-05-02 17:52:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:17,926 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-05-02 17:52:17,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-05-02 17:52:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 17:52:17,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:17,927 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:18,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:18,159 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -683280108, now seen corresponding path program 24 times [2021-05-02 17:52:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:18,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915155123] [2021-05-02 17:52:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:18,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-05-02 17:52:18,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:18,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915155123] [2021-05-02 17:52:18,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915155123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:18,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149302596] [2021-05-02 17:52:18,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:20,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-05-02 17:52:20,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:52:20,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:20,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 17:52:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149302596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:20,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:20,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 32 [2021-05-02 17:52:20,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729594638] [2021-05-02 17:52:20,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:52:20,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:52:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:20,514 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 30 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:20,774 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2021-05-02 17:52:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 17:52:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 30 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 17:52:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:20,775 INFO L225 Difference]: With dead ends: 179 [2021-05-02 17:52:20,775 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 17:52:20,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 17:52:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-05-02 17:52:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.1736526946107784) internal successors, (196), 167 states have internal predecessors, (196), 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) [2021-05-02 17:52:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2021-05-02 17:52:20,779 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 157 [2021-05-02 17:52:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:20,779 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2021-05-02 17:52:20,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 30 states have internal predecessors, (166), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2021-05-02 17:52:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 17:52:20,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:20,780 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:20,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 17:52:20,997 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash 554919235, now seen corresponding path program 25 times [2021-05-02 17:52:20,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:20,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845128101] [2021-05-02 17:52:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 17:52:21,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845128101] [2021-05-02 17:52:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845128101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458802190] [2021-05-02 17:52:21,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:52:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:21,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 17:52:21,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458802190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:21,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:21,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 17:52:21,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9042661] [2021-05-02 17:52:21,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:52:21,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:52:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:21,743 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:21,976 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2021-05-02 17:52:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 17:52:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 17:52:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:21,977 INFO L225 Difference]: With dead ends: 181 [2021-05-02 17:52:21,977 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 17:52:21,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 17:52:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2021-05-02 17:52:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 169 states have internal predecessors, (198), 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) [2021-05-02 17:52:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2021-05-02 17:52:21,980 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 171 [2021-05-02 17:52:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:21,981 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2021-05-02 17:52:21,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2021-05-02 17:52:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 17:52:21,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:21,982 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:22,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:52:22,197 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash -733188063, now seen corresponding path program 26 times [2021-05-02 17:52:22,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:22,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200304249] [2021-05-02 17:52:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:22,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 17:52:22,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200304249] [2021-05-02 17:52:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200304249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313683513] [2021-05-02 17:52:22,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:22,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:22,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:52:22,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:22,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 17:52:22,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313683513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:22,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:22,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 17:52:22,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658097023] [2021-05-02 17:52:22,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:52:22,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:52:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:22,935 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:23,172 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2021-05-02 17:52:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 17:52:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 17:52:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:23,173 INFO L225 Difference]: With dead ends: 188 [2021-05-02 17:52:23,173 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 17:52:23,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 17:52:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2021-05-02 17:52:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.1695906432748537) internal successors, (200), 171 states have internal predecessors, (200), 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) [2021-05-02 17:52:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 204 transitions. [2021-05-02 17:52:23,177 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 204 transitions. Word has length 173 [2021-05-02 17:52:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:23,177 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 204 transitions. [2021-05-02 17:52:23,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 204 transitions. [2021-05-02 17:52:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 17:52:23,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:23,178 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:23,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:23,379 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1653720193, now seen corresponding path program 27 times [2021-05-02 17:52:23,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:23,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24007481] [2021-05-02 17:52:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:23,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 17:52:23,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:23,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24007481] [2021-05-02 17:52:23,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24007481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:23,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640941667] [2021-05-02 17:52:23,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:25,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-05-02 17:52:25,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:52:25,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:25,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 17:52:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640941667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:25,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:25,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 35 [2021-05-02 17:52:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481160831] [2021-05-02 17:52:25,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:25,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:25,459 INFO L87 Difference]: Start difference. First operand 176 states and 204 transitions. Second operand has 35 states, 35 states have (on average 5.257142857142857) internal successors, (184), 33 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:25,758 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-05-02 17:52:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.257142857142857) internal successors, (184), 33 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 17:52:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:25,760 INFO L225 Difference]: With dead ends: 197 [2021-05-02 17:52:25,760 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 17:52:25,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 17:52:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-05-02 17:52:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 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) [2021-05-02 17:52:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2021-05-02 17:52:25,763 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 175 [2021-05-02 17:52:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:25,764 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2021-05-02 17:52:25,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.257142857142857) internal successors, (184), 33 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2021-05-02 17:52:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 17:52:25,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:25,765 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:25,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:25,985 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1983528018, now seen corresponding path program 28 times [2021-05-02 17:52:25,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:25,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386925569] [2021-05-02 17:52:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:26,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:26,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:26,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386925569] [2021-05-02 17:52:26,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386925569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:26,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140843792] [2021-05-02 17:52:26,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:26,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:26,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:52:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:26,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:26,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140843792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:26,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:26,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 17:52:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229596418] [2021-05-02 17:52:26,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:52:26,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:52:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:26,794 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:27,101 INFO L93 Difference]: Finished difference Result 199 states and 232 transitions. [2021-05-02 17:52:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:52:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 17:52:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:27,103 INFO L225 Difference]: With dead ends: 199 [2021-05-02 17:52:27,103 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 17:52:27,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 17:52:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 192. [2021-05-02 17:52:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.1711229946524064) internal successors, (219), 187 states have internal predecessors, (219), 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) [2021-05-02 17:52:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 223 transitions. [2021-05-02 17:52:27,108 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 223 transitions. Word has length 189 [2021-05-02 17:52:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:27,108 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 223 transitions. [2021-05-02 17:52:27,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 223 transitions. [2021-05-02 17:52:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 17:52:27,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:27,109 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:27,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 17:52:27,333 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1112609548, now seen corresponding path program 29 times [2021-05-02 17:52:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119648805] [2021-05-02 17:52:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:27,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:27,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:27,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119648805] [2021-05-02 17:52:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119648805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267871452] [2021-05-02 17:52:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:35,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-02 17:52:35,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 17:52:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:35,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267871452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:35,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:35,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 17:52:35,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053022235] [2021-05-02 17:52:35,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:35,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:35,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:35,293 INFO L87 Difference]: Start difference. First operand 192 states and 223 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:35,540 INFO L93 Difference]: Finished difference Result 206 states and 241 transitions. [2021-05-02 17:52:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:35,540 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 17:52:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:35,541 INFO L225 Difference]: With dead ends: 206 [2021-05-02 17:52:35,541 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 17:52:35,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 17:52:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 194. [2021-05-02 17:52:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.1693121693121693) internal successors, (221), 189 states have internal predecessors, (221), 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) [2021-05-02 17:52:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 225 transitions. [2021-05-02 17:52:35,545 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 225 transitions. Word has length 191 [2021-05-02 17:52:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:35,546 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 225 transitions. [2021-05-02 17:52:35,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 225 transitions. [2021-05-02 17:52:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 17:52:35,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:35,547 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:35,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:35,773 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 88474346, now seen corresponding path program 30 times [2021-05-02 17:52:35,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:35,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649671248] [2021-05-02 17:52:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:36,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:36,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:36,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649671248] [2021-05-02 17:52:36,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649671248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:36,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258012165] [2021-05-02 17:52:36,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:44,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-05-02 17:52:44,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:52:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:44,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:45,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258012165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:45,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:45,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 17:52:45,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299843799] [2021-05-02 17:52:45,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:52:45,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:52:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:45,019 INFO L87 Difference]: Start difference. First operand 194 states and 225 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:45,272 INFO L93 Difference]: Finished difference Result 213 states and 250 transitions. [2021-05-02 17:52:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:52:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 17:52:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:45,273 INFO L225 Difference]: With dead ends: 213 [2021-05-02 17:52:45,273 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 17:52:45,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 17:52:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-05-02 17:52:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 191 states have internal predecessors, (223), 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) [2021-05-02 17:52:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 227 transitions. [2021-05-02 17:52:45,278 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 227 transitions. Word has length 193 [2021-05-02 17:52:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:45,278 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 227 transitions. [2021-05-02 17:52:45,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 227 transitions. [2021-05-02 17:52:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 17:52:45,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:45,279 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:45,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 17:52:45,493 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:45,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash -557943992, now seen corresponding path program 31 times [2021-05-02 17:52:45,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:45,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140566565] [2021-05-02 17:52:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:46,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:46,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:46,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140566565] [2021-05-02 17:52:46,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140566565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:46,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224365619] [2021-05-02 17:52:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:52:46,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:46,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:46,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224365619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:46,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:46,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 17:52:46,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485846338] [2021-05-02 17:52:46,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:52:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:52:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:46,435 INFO L87 Difference]: Start difference. First operand 196 states and 227 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:46,664 INFO L93 Difference]: Finished difference Result 220 states and 259 transitions. [2021-05-02 17:52:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:52:46,665 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 17:52:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:46,665 INFO L225 Difference]: With dead ends: 220 [2021-05-02 17:52:46,665 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 17:52:46,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 17:52:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 198. [2021-05-02 17:52:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.16580310880829) internal successors, (225), 193 states have internal predecessors, (225), 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) [2021-05-02 17:52:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 229 transitions. [2021-05-02 17:52:46,669 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 229 transitions. Word has length 195 [2021-05-02 17:52:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:46,670 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 229 transitions. [2021-05-02 17:52:46,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 229 transitions. [2021-05-02 17:52:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 17:52:46,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:46,671 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:46,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 17:52:46,895 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1004291110, now seen corresponding path program 32 times [2021-05-02 17:52:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:46,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797119681] [2021-05-02 17:52:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:47,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:47,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:47,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797119681] [2021-05-02 17:52:47,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797119681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900866258] [2021-05-02 17:52:47,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:47,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:52:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:47,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900866258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:47,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:47,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 17:52:47,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415427093] [2021-05-02 17:52:47,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 17:52:47,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 17:52:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:47,863 INFO L87 Difference]: Start difference. First operand 198 states and 229 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:48,125 INFO L93 Difference]: Finished difference Result 227 states and 268 transitions. [2021-05-02 17:52:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 17:52:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 17:52:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:48,127 INFO L225 Difference]: With dead ends: 227 [2021-05-02 17:52:48,127 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 17:52:48,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 17:52:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 200. [2021-05-02 17:52:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 195 states have internal predecessors, (227), 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) [2021-05-02 17:52:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 231 transitions. [2021-05-02 17:52:48,131 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 231 transitions. Word has length 197 [2021-05-02 17:52:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:48,131 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 231 transitions. [2021-05-02 17:52:48,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 231 transitions. [2021-05-02 17:52:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 17:52:48,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:48,132 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:48,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:52:48,353 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash -926329468, now seen corresponding path program 33 times [2021-05-02 17:52:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:48,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636477165] [2021-05-02 17:52:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:48,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-05-02 17:52:48,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:48,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636477165] [2021-05-02 17:52:48,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636477165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:48,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951035880] [2021-05-02 17:52:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:58,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-02 17:52:58,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:52:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:58,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-05-02 17:52:58,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951035880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:58,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:58,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 41 [2021-05-02 17:52:58,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062295828] [2021-05-02 17:52:58,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:52:58,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:58,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:52:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:58,537 INFO L87 Difference]: Start difference. First operand 200 states and 231 transitions. Second operand has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 39 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:58,949 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2021-05-02 17:52:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:52:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 39 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2021-05-02 17:52:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:58,951 INFO L225 Difference]: With dead ends: 236 [2021-05-02 17:52:58,951 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 17:52:58,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 17:52:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2021-05-02 17:52:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.1719457013574661) internal successors, (259), 221 states have internal predecessors, (259), 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) [2021-05-02 17:52:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2021-05-02 17:52:58,955 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 199 [2021-05-02 17:52:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:58,955 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2021-05-02 17:52:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.073170731707317) internal successors, (208), 39 states have internal predecessors, (208), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2021-05-02 17:52:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 17:52:58,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:58,956 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:59,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 17:52:59,173 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash -676704380, now seen corresponding path program 34 times [2021-05-02 17:52:59,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:59,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027581120] [2021-05-02 17:52:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:59,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 17:52:59,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027581120] [2021-05-02 17:52:59,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027581120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202077276] [2021-05-02 17:52:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:59,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:52:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:59,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 17:53:00,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202077276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:00,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:00,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 17:53:00,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772248530] [2021-05-02 17:53:00,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:53:00,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:53:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:53:00,171 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:00,440 INFO L93 Difference]: Finished difference Result 235 states and 274 transitions. [2021-05-02 17:53:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:53:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 17:53:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:00,441 INFO L225 Difference]: With dead ends: 235 [2021-05-02 17:53:00,442 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 17:53:00,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:53:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 17:53:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 17:53:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.1704035874439462) internal successors, (261), 223 states have internal predecessors, (261), 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) [2021-05-02 17:53:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2021-05-02 17:53:00,446 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 225 [2021-05-02 17:53:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:00,446 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2021-05-02 17:53:00,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2021-05-02 17:53:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 17:53:00,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:00,447 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:00,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 17:53:00,661 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1754908642, now seen corresponding path program 35 times [2021-05-02 17:53:00,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:00,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204220527] [2021-05-02 17:53:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 17:53:01,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204220527] [2021-05-02 17:53:01,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204220527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:01,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851284527] [2021-05-02 17:53:01,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:04,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-02 17:53:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:04,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:53:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:04,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 17:53:04,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851284527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:04,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:04,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 17:53:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882876634] [2021-05-02 17:53:04,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:53:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:53:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:53:04,600 INFO L87 Difference]: Start difference. First operand 228 states and 265 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:04,983 INFO L93 Difference]: Finished difference Result 242 states and 283 transitions. [2021-05-02 17:53:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:53:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2021-05-02 17:53:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:04,984 INFO L225 Difference]: With dead ends: 242 [2021-05-02 17:53:04,984 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 17:53:04,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:53:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 17:53:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 230. [2021-05-02 17:53:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1688888888888889) internal successors, (263), 225 states have internal predecessors, (263), 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) [2021-05-02 17:53:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2021-05-02 17:53:04,988 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 227 [2021-05-02 17:53:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:04,988 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2021-05-02 17:53:04,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2021-05-02 17:53:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 17:53:04,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:04,989 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:05,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 17:53:05,202 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2072813760, now seen corresponding path program 36 times [2021-05-02 17:53:05,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:05,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313229385] [2021-05-02 17:53:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:05,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-05-02 17:53:05,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:05,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313229385] [2021-05-02 17:53:05,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313229385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:05,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524312609] [2021-05-02 17:53:05,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:17,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-05-02 17:53:17,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:53:17,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-05-02 17:53:18,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524312609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:18,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:18,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 44 [2021-05-02 17:53:18,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676390324] [2021-05-02 17:53:18,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:53:18,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:18,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:53:18,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:18,359 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 42 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:18,787 INFO L93 Difference]: Finished difference Result 251 states and 293 transitions. [2021-05-02 17:53:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:53:18,788 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 42 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2021-05-02 17:53:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:18,789 INFO L225 Difference]: With dead ends: 251 [2021-05-02 17:53:18,789 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 17:53:18,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 746.4ms TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:53:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 17:53:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2021-05-02 17:53:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.1715481171548117) internal successors, (280), 239 states have internal predecessors, (280), 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) [2021-05-02 17:53:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2021-05-02 17:53:18,793 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 229 [2021-05-02 17:53:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:18,794 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2021-05-02 17:53:18,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 42 states have internal predecessors, (238), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2021-05-02 17:53:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-05-02 17:53:18,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:18,795 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:19,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 17:53:19,009 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash -974865169, now seen corresponding path program 37 times [2021-05-02 17:53:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:19,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942411567] [2021-05-02 17:53:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:19,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 17:53:19,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:19,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942411567] [2021-05-02 17:53:19,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942411567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:19,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184819360] [2021-05-02 17:53:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:53:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:19,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 17:53:20,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184819360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:20,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:20,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 17:53:20,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750945773] [2021-05-02 17:53:20,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 17:53:20,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:20,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 17:53:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:53:20,177 INFO L87 Difference]: Start difference. First operand 244 states and 284 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:20,553 INFO L93 Difference]: Finished difference Result 253 states and 295 transitions. [2021-05-02 17:53:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:53:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2021-05-02 17:53:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:20,554 INFO L225 Difference]: With dead ends: 253 [2021-05-02 17:53:20,554 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 17:53:20,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:53:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 17:53:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2021-05-02 17:53:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.170124481327801) internal successors, (282), 241 states have internal predecessors, (282), 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) [2021-05-02 17:53:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 286 transitions. [2021-05-02 17:53:20,559 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 286 transitions. Word has length 243 [2021-05-02 17:53:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:20,559 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 286 transitions. [2021-05-02 17:53:20,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 286 transitions. [2021-05-02 17:53:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 17:53:20,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:20,560 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:20,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:20,777 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash -76146227, now seen corresponding path program 38 times [2021-05-02 17:53:20,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:20,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29639511] [2021-05-02 17:53:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:21,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 17:53:21,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29639511] [2021-05-02 17:53:21,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29639511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51405210] [2021-05-02 17:53:21,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:21,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:53:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:53:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:21,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 17:53:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51405210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 17:53:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753997740] [2021-05-02 17:53:21,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:53:21,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:53:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:21,959 INFO L87 Difference]: Start difference. First operand 246 states and 286 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:22,272 INFO L93 Difference]: Finished difference Result 260 states and 304 transitions. [2021-05-02 17:53:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:53:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2021-05-02 17:53:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:22,273 INFO L225 Difference]: With dead ends: 260 [2021-05-02 17:53:22,273 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 17:53:22,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 17:53:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 248. [2021-05-02 17:53:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.168724279835391) internal successors, (284), 243 states have internal predecessors, (284), 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) [2021-05-02 17:53:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2021-05-02 17:53:22,278 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 245 [2021-05-02 17:53:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:22,279 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2021-05-02 17:53:22,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2021-05-02 17:53:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-02 17:53:22,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:22,280 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:22,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:22,486 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 304330539, now seen corresponding path program 39 times [2021-05-02 17:53:22,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:22,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402066199] [2021-05-02 17:53:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:23,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4526 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 17:53:23,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402066199] [2021-05-02 17:53:23,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402066199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:23,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399063996] [2021-05-02 17:53:23,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:41,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-02 17:53:41,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:41,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:53:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:41,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4526 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-05-02 17:53:41,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399063996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:41,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:41,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 47 [2021-05-02 17:53:41,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895192058] [2021-05-02 17:53:41,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:53:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:53:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:41,774 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 47 states, 47 states have (on average 5.446808510638298) internal successors, (256), 45 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:42,158 INFO L93 Difference]: Finished difference Result 269 states and 314 transitions. [2021-05-02 17:53:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:53:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.446808510638298) internal successors, (256), 45 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2021-05-02 17:53:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:42,160 INFO L225 Difference]: With dead ends: 269 [2021-05-02 17:53:42,160 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 17:53:42,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 868.6ms TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:53:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 17:53:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-05-02 17:53:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.171206225680934) internal successors, (301), 257 states have internal predecessors, (301), 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) [2021-05-02 17:53:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2021-05-02 17:53:42,164 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 247 [2021-05-02 17:53:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:42,164 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2021-05-02 17:53:42,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 5.446808510638298) internal successors, (256), 45 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2021-05-02 17:53:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-02 17:53:42,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:42,165 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:42,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:42,369 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash 110587738, now seen corresponding path program 40 times [2021-05-02 17:53:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:42,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450469551] [2021-05-02 17:53:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 17:53:43,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:43,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450469551] [2021-05-02 17:53:43,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450469551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:43,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399167550] [2021-05-02 17:53:43,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:43,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:53:43,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:53:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:43,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 17:53:43,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399167550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:43,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:43,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 17:53:43,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391950996] [2021-05-02 17:53:43,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 17:53:43,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:43,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 17:53:43,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:53:43,712 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:44,021 INFO L93 Difference]: Finished difference Result 271 states and 316 transitions. [2021-05-02 17:53:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:53:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2021-05-02 17:53:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:44,023 INFO L225 Difference]: With dead ends: 271 [2021-05-02 17:53:44,023 INFO L226 Difference]: Without dead ends: 271 [2021-05-02 17:53:44,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:53:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-02 17:53:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2021-05-02 17:53:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.16988416988417) internal successors, (303), 259 states have internal predecessors, (303), 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) [2021-05-02 17:53:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 307 transitions. [2021-05-02 17:53:44,027 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 307 transitions. Word has length 261 [2021-05-02 17:53:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:44,027 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 307 transitions. [2021-05-02 17:53:44,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 307 transitions. [2021-05-02 17:53:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 17:53:44,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:44,029 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:44,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 17:53:44,253 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:44,253 INFO L82 PathProgramCache]: Analyzing trace with hash -288714568, now seen corresponding path program 41 times [2021-05-02 17:53:44,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:44,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341190680] [2021-05-02 17:53:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:45,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5167 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 17:53:45,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341190680] [2021-05-02 17:53:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341190680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491059082] [2021-05-02 17:53:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:57,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-02 17:53:57,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:53:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5167 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 17:53:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491059082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:57,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:57,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 17:53:57,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793332483] [2021-05-02 17:53:57,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:53:57,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:53:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:57,645 INFO L87 Difference]: Start difference. First operand 264 states and 307 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:58,013 INFO L93 Difference]: Finished difference Result 278 states and 325 transitions. [2021-05-02 17:53:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:53:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2021-05-02 17:53:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:58,014 INFO L225 Difference]: With dead ends: 278 [2021-05-02 17:53:58,014 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 17:53:58,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 17:53:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 266. [2021-05-02 17:53:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1685823754789273) internal successors, (305), 261 states have internal predecessors, (305), 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) [2021-05-02 17:53:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2021-05-02 17:53:58,018 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 263 [2021-05-02 17:53:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:58,018 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2021-05-02 17:53:58,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2021-05-02 17:53:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-05-02 17:53:58,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:58,019 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:58,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:58,237 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1766141290, now seen corresponding path program 42 times [2021-05-02 17:53:58,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:58,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825166194] [2021-05-02 17:53:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5252 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2021-05-02 17:53:59,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825166194] [2021-05-02 17:53:59,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825166194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011572770] [2021-05-02 17:53:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:32,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-05-02 17:55:32,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 17:55:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:32,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:32,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5252 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2021-05-02 17:55:33,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011572770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:33,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:33,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 50 [2021-05-02 17:55:33,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360331966] [2021-05-02 17:55:33,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 17:55:33,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 17:55:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:55:33,242 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand has 50 states, 50 states have (on average 5.48) internal successors, (274), 48 states have internal predecessors, (274), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:55:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:33,632 INFO L93 Difference]: Finished difference Result 287 states and 335 transitions. [2021-05-02 17:55:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:55:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.48) internal successors, (274), 48 states have internal predecessors, (274), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2021-05-02 17:55:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:33,634 INFO L225 Difference]: With dead ends: 287 [2021-05-02 17:55:33,634 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 17:55:33,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 929.8ms TimeCoverageRelationStatistics Valid=1097, Invalid=1555, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:55:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 17:55:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2021-05-02 17:55:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.170909090909091) internal successors, (322), 275 states have internal predecessors, (322), 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) [2021-05-02 17:55:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 326 transitions. [2021-05-02 17:55:33,637 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 326 transitions. Word has length 265 [2021-05-02 17:55:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:33,637 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 326 transitions. [2021-05-02 17:55:33,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 5.48) internal successors, (274), 48 states have internal predecessors, (274), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:55:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 326 transitions. [2021-05-02 17:55:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-05-02 17:55:33,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:33,639 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:33,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:33,840 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:33,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1767209275, now seen corresponding path program 43 times [2021-05-02 17:55:33,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:33,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920982397] [2021-05-02 17:55:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:34,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 17:55:34,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:34,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920982397] [2021-05-02 17:55:34,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920982397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:34,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212243758] [2021-05-02 17:55:34,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 17:55:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 17:55:35,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212243758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:35,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:35,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 17:55:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116382712] [2021-05-02 17:55:35,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 17:55:35,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 17:55:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:55:35,282 INFO L87 Difference]: Start difference. First operand 280 states and 326 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:55:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:35,625 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2021-05-02 17:55:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 17:55:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2021-05-02 17:55:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:35,627 INFO L225 Difference]: With dead ends: 289 [2021-05-02 17:55:35,627 INFO L226 Difference]: Without dead ends: 289 [2021-05-02 17:55:35,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 842.6ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:55:35,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-02 17:55:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 282. [2021-05-02 17:55:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.1696750902527075) internal successors, (324), 277 states have internal predecessors, (324), 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) [2021-05-02 17:55:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2021-05-02 17:55:35,630 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 279 [2021-05-02 17:55:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:35,631 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2021-05-02 17:55:35,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:55:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2021-05-02 17:55:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-05-02 17:55:35,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:35,632 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:35,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 17:55:35,849 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1934052515, now seen corresponding path program 44 times [2021-05-02 17:55:35,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:35,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666344992] [2021-05-02 17:55:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:36,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 17:55:36,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:36,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666344992] [2021-05-02 17:55:36,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666344992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:36,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601527261] [2021-05-02 17:55:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:36,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:55:36,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:36,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:55:36,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:36,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:36,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 17:55:37,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601527261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:37,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:37,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 17:55:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689376277] [2021-05-02 17:55:37,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 17:55:37,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 17:55:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:55:37,298 INFO L87 Difference]: Start difference. First operand 282 states and 328 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:55:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:37,716 INFO L93 Difference]: Finished difference Result 296 states and 346 transitions. [2021-05-02 17:55:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:55:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2021-05-02 17:55:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:37,717 INFO L225 Difference]: With dead ends: 296 [2021-05-02 17:55:37,717 INFO L226 Difference]: Without dead ends: 296 [2021-05-02 17:55:37,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 852.9ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:55:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-02 17:55:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-05-02 17:55:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.168458781362007) internal successors, (326), 279 states have internal predecessors, (326), 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) [2021-05-02 17:55:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2021-05-02 17:55:37,721 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 281 [2021-05-02 17:55:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:37,721 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2021-05-02 17:55:37,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:55:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2021-05-02 17:55:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-05-02 17:55:37,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:37,723 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:37,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 17:55:37,933 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1681255679, now seen corresponding path program 45 times [2021-05-02 17:55:37,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:37,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793178328] [2021-05-02 17:55:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:38,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6032 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 17:55:38,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:38,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793178328] [2021-05-02 17:55:38,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793178328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:38,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069257847] [2021-05-02 17:55:38,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:56:46,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-05-02 17:56:46,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:56:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:56:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:56:46,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6032 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-05-02 17:56:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069257847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:56:47,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:56:47,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 53 [2021-05-02 17:56:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491652372] [2021-05-02 17:56:47,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:56:47,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:56:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:56:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:56:47,157 INFO L87 Difference]: Start difference. First operand 284 states and 330 transitions. Second operand has 53 states, 53 states have (on average 5.509433962264151) internal successors, (292), 51 states have internal predecessors, (292), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:56:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:56:47,534 INFO L93 Difference]: Finished difference Result 305 states and 356 transitions. [2021-05-02 17:56:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:56:47,534 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.509433962264151) internal successors, (292), 51 states have internal predecessors, (292), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2021-05-02 17:56:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:56:47,535 INFO L225 Difference]: With dead ends: 305 [2021-05-02 17:56:47,535 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 17:56:47,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 985.0ms TimeCoverageRelationStatistics Valid=1241, Invalid=1729, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:56:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 17:56:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2021-05-02 17:56:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.1706484641638226) internal successors, (343), 293 states have internal predecessors, (343), 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) [2021-05-02 17:56:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 347 transitions. [2021-05-02 17:56:47,539 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 347 transitions. Word has length 283 [2021-05-02 17:56:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:56:47,540 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 347 transitions. [2021-05-02 17:56:47,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 5.509433962264151) internal successors, (292), 51 states have internal predecessors, (292), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:56:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 347 transitions. [2021-05-02 17:56:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-05-02 17:56:47,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:56:47,542 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:56:47,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 17:56:47,757 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:56:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:56:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash 422454064, now seen corresponding path program 46 times [2021-05-02 17:56:47,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:56:47,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92232591] [2021-05-02 17:56:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:56:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:56:48,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:56:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:56:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 17:56:48,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:56:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92232591] [2021-05-02 17:56:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92232591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:56:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142239483] [2021-05-02 17:56:48,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:56:49,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:56:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:56:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:56:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:56:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:56:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 17:56:49,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142239483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:56:49,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:56:49,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 17:56:49,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611407809] [2021-05-02 17:56:49,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 17:56:49,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:56:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 17:56:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:56:49,439 INFO L87 Difference]: Start difference. First operand 298 states and 347 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:56:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:56:49,901 INFO L93 Difference]: Finished difference Result 307 states and 358 transitions. [2021-05-02 17:56:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 17:56:49,901 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2021-05-02 17:56:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:56:49,902 INFO L225 Difference]: With dead ends: 307 [2021-05-02 17:56:49,902 INFO L226 Difference]: Without dead ends: 307 [2021-05-02 17:56:49,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:56:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-02 17:56:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-05-02 17:56:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.1694915254237288) internal successors, (345), 295 states have internal predecessors, (345), 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) [2021-05-02 17:56:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 349 transitions. [2021-05-02 17:56:49,906 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 349 transitions. Word has length 297 [2021-05-02 17:56:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:56:49,906 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 349 transitions. [2021-05-02 17:56:49,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:56:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 349 transitions. [2021-05-02 17:56:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-05-02 17:56:49,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:56:49,908 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:56:50,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:56:50,125 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:56:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:56:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -37458546, now seen corresponding path program 47 times [2021-05-02 17:56:50,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:56:50,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554335942] [2021-05-02 17:56:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:56:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:56:51,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:56:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:56:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6769 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 17:56:51,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:56:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554335942] [2021-05-02 17:56:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554335942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:56:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814806023] [2021-05-02 17:56:51,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:50,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-05-02 17:57:50,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:57:50,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:50,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6769 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 17:57:51,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814806023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:51,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:51,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 17:57:51,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958056057] [2021-05-02 17:57:51,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:57:51,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:51,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:57:51,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:57:51,045 INFO L87 Difference]: Start difference. First operand 300 states and 349 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:51,609 INFO L93 Difference]: Finished difference Result 314 states and 367 transitions. [2021-05-02 17:57:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:57:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2021-05-02 17:57:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:51,610 INFO L225 Difference]: With dead ends: 314 [2021-05-02 17:57:51,610 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 17:57:51,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:57:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 17:57:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 302. [2021-05-02 17:57:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.1683501683501682) internal successors, (347), 297 states have internal predecessors, (347), 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) [2021-05-02 17:57:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 351 transitions. [2021-05-02 17:57:51,614 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 351 transitions. Word has length 299 [2021-05-02 17:57:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:51,615 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 351 transitions. [2021-05-02 17:57:51,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 351 transitions. [2021-05-02 17:57:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-05-02 17:57:51,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:51,617 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:51,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:51,845 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:51,845 INFO L82 PathProgramCache]: Analyzing trace with hash 368154732, now seen corresponding path program 48 times [2021-05-02 17:57:51,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:51,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79859448] [2021-05-02 17:57:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6866 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-05-02 17:57:52,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:52,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79859448] [2021-05-02 17:57:52,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79859448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:52,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118257580] [2021-05-02 17:57:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:03:51,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2021-05-02 18:03:51,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:03:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 18:03:51,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:03:51,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6866 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-05-02 18:03:51,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118257580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:03:51,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:03:51,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 56 [2021-05-02 18:03:51,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874131822] [2021-05-02 18:03:51,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:03:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:03:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:03:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:03:51,917 INFO L87 Difference]: Start difference. First operand 302 states and 351 transitions. Second operand has 56 states, 56 states have (on average 5.535714285714286) internal successors, (310), 54 states have internal predecessors, (310), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:03:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:03:52,354 INFO L93 Difference]: Finished difference Result 323 states and 377 transitions. [2021-05-02 18:03:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:03:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.535714285714286) internal successors, (310), 54 states have internal predecessors, (310), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2021-05-02 18:03:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:03:52,356 INFO L225 Difference]: With dead ends: 323 [2021-05-02 18:03:52,356 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 18:03:52,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=1394, Invalid=1912, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:03:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 18:03:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2021-05-02 18:03:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.1704180064308682) internal successors, (364), 311 states have internal predecessors, (364), 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) [2021-05-02 18:03:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 368 transitions. [2021-05-02 18:03:52,360 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 368 transitions. Word has length 301 [2021-05-02 18:03:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:03:52,360 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 368 transitions. [2021-05-02 18:03:52,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 5.535714285714286) internal successors, (310), 54 states have internal predecessors, (310), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:03:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 368 transitions. [2021-05-02 18:03:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-05-02 18:03:52,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:03:52,362 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:03:52,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:03:52,577 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:03:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:03:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash 895116443, now seen corresponding path program 49 times [2021-05-02 18:03:52,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:03:52,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599166964] [2021-05-02 18:03:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:03:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:53,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:03:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 18:03:53,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:03:53,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599166964] [2021-05-02 18:03:53,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599166964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:03:53,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224464950] [2021-05-02 18:03:53,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:03:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:53,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 18:03:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:03:53,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:53,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 18:03:54,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224464950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:03:54,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:03:54,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 18:03:54,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970806178] [2021-05-02 18:03:54,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 18:03:54,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:03:54,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 18:03:54,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 18:03:54,254 INFO L87 Difference]: Start difference. First operand 316 states and 368 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:03:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:03:54,720 INFO L93 Difference]: Finished difference Result 325 states and 379 transitions. [2021-05-02 18:03:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 18:03:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2021-05-02 18:03:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:03:54,722 INFO L225 Difference]: With dead ends: 325 [2021-05-02 18:03:54,722 INFO L226 Difference]: Without dead ends: 325 [2021-05-02 18:03:54,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1045.5ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 18:03:54,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-02 18:03:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 318. [2021-05-02 18:03:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.1693290734824282) internal successors, (366), 313 states have internal predecessors, (366), 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) [2021-05-02 18:03:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 370 transitions. [2021-05-02 18:03:54,726 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 370 transitions. Word has length 315 [2021-05-02 18:03:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:03:54,726 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 370 transitions. [2021-05-02 18:03:54,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:03:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 370 transitions. [2021-05-02 18:03:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-05-02 18:03:54,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:03:54,728 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:03:54,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:03:54,948 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:03:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:03:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash 625087353, now seen corresponding path program 50 times [2021-05-02 18:03:54,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:03:54,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3236753] [2021-05-02 18:03:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:03:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:56,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:03:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7651 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 18:03:56,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:03:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3236753] [2021-05-02 18:03:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3236753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:03:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161491451] [2021-05-02 18:03:56,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:03:56,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:03:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:03:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 18:03:56,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:03:56,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:03:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7651 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 18:03:56,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161491451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:03:56,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:03:56,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 18:03:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269460150] [2021-05-02 18:03:56,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:03:56,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:03:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:03:56,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:03:56,803 INFO L87 Difference]: Start difference. First operand 318 states and 370 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:03:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:03:57,328 INFO L93 Difference]: Finished difference Result 332 states and 388 transitions. [2021-05-02 18:03:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:03:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2021-05-02 18:03:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:03:57,329 INFO L225 Difference]: With dead ends: 332 [2021-05-02 18:03:57,329 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 18:03:57,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1190.7ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:03:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 18:03:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 320. [2021-05-02 18:03:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1682539682539683) internal successors, (368), 315 states have internal predecessors, (368), 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) [2021-05-02 18:03:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 372 transitions. [2021-05-02 18:03:57,333 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 372 transitions. Word has length 317 [2021-05-02 18:03:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:03:57,334 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 372 transitions. [2021-05-02 18:03:57,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:03:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 372 transitions. [2021-05-02 18:03:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-05-02 18:03:57,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:03:57,335 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:03:57,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 18:03:57,549 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:03:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:03:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1174830377, now seen corresponding path program 51 times [2021-05-02 18:03:57,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:03:57,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298314429] [2021-05-02 18:03:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:03:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:58,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:03:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:03:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 18:03:58,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:03:58,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298314429] [2021-05-02 18:03:58,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298314429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:03:58,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551056170] [2021-05-02 18:03:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:06:18,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-05-02 18:06:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:06:18,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 18:06:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:06:18,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2021-05-02 18:06:18,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551056170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:18,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:06:18,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 59 [2021-05-02 18:06:18,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703210419] [2021-05-02 18:06:18,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 18:06:18,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:18,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 18:06:18,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=1876, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 18:06:18,782 INFO L87 Difference]: Start difference. First operand 320 states and 372 transitions. Second operand has 59 states, 59 states have (on average 5.559322033898305) internal successors, (328), 57 states have internal predecessors, (328), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)