/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_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:51:43,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:51:43,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:51:43,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:51:43,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:51:43,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:51:43,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:51:44,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:51:44,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:51:44,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:51:44,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:51:44,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:51:44,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:51:44,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:51:44,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:51:44,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:51:44,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:51:44,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:51:44,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:51:44,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:51:44,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:51:44,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:51:44,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:51:44,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:51:44,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:51:44,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:51:44,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:51:44,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:51:44,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:51:44,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:51:44,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:51:44,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:51:44,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:51:44,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:51:44,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:51:44,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:51:44,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:51:44,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:51:44,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:51:44,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:51:44,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:51:44,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:51:44,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:51:44,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:51:44,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:51:44,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:51:44,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:51:44,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:51:44,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:51:44,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:51:44,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:51:44,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:51:44,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:51:44,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:51:44,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:44,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:51:44,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:51:44,101 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:51:44,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:51:44,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:51:44,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:51:44,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:51:44,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:51:44,437 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:51:44,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2021-05-02 17:51:44,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b12da82a5/aae6689fc34146a69899a91199e566b0/FLAG65a9c0e3f [2021-05-02 17:51:44,900 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:51:44,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2021-05-02 17:51:44,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b12da82a5/aae6689fc34146a69899a91199e566b0/FLAG65a9c0e3f [2021-05-02 17:51:44,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b12da82a5/aae6689fc34146a69899a91199e566b0 [2021-05-02 17:51:44,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:51:44,932 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:51:44,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:44,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:51:44,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:51:44,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:44" (1/1) ... [2021-05-02 17:51:44,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff5b1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:44, skipping insertion in model container [2021-05-02 17:51:44,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:44" (1/1) ... [2021-05-02 17:51:44,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:51:44,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:51:45,116 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_2-2-simple.i[809,822] [2021-05-02 17:51:45,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:45,142 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:51:45,191 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_2-2-simple.i[809,822] [2021-05-02 17:51:45,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:45,222 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:51:45,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45 WrapperNode [2021-05-02 17:51:45,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:45,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:51:45,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:51:45,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:51:45,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:51:45,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:51:45,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:51:45,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:51:45,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (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 17:51:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:51:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:51:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:51:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:51:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:51:45,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:51:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:51:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:51:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 17:51:45,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:51:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:51:45,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:51:45,572 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:51:45,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:45 BoogieIcfgContainer [2021-05-02 17:51:45,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:51:45,574 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:51:45,574 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:51:45,575 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:51:45,577 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:45" (1/1) ... [2021-05-02 17:51:45,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:45 BasicIcfg [2021-05-02 17:51:45,591 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:51:45,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:51:45,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:51:45,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:51:45,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:51:44" (1/4) ... [2021-05-02 17:51:45,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eee5c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:45, skipping insertion in model container [2021-05-02 17:51:45,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:45" (2/4) ... [2021-05-02 17:51:45,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eee5c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:45, skipping insertion in model container [2021-05-02 17:51:45,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:45" (3/4) ... [2021-05-02 17:51:45,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eee5c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:45, skipping insertion in model container [2021-05-02 17:51:45,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:45" (4/4) ... [2021-05-02 17:51:45,597 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.iJordan [2021-05-02 17:51:45,601 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:51:45,604 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:51:45,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:51:45,631 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:51:45,631 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:51:45,632 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:51:45,632 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:51:45,632 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:51:45,632 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:51:45,632 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:51:45,632 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:51:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 17:51:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:45,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:45,648 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:45,649 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1502470948, now seen corresponding path program 1 times [2021-05-02 17:51:45,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:45,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253210929] [2021-05-02 17:51:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,947 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 17:51:45,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253210929] [2021-05-02 17:51:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253210929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:45,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:45,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:51:45,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862336316] [2021-05-02 17:51:45,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:51:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:51:45,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:45,972 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 17:51:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:46,023 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 17:51:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:51:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 17:51:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:46,030 INFO L225 Difference]: With dead ends: 21 [2021-05-02 17:51:46,030 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:51:46,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:51:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:51:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 17:51:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 17:51:46,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 17:51:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:46,059 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 17:51:46,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 17:51:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 17:51:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:46,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:46,061 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:46,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:51:46,061 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1473841797, now seen corresponding path program 1 times [2021-05-02 17:51:46,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:46,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417550517] [2021-05-02 17:51:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,199 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 17:51:46,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417550517] [2021-05-02 17:51:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417550517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:46,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:46,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:51:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002600813] [2021-05-02 17:51:46,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:51:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:51:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:46,205 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:51:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:46,262 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 17:51:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:51:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 17:51:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:46,264 INFO L225 Difference]: With dead ends: 16 [2021-05-02 17:51:46,264 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 17:51:46,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 17:51:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 17:51:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 17:51:46,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 17:51:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:46,272 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 17:51:46,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:51:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 17:51:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:51:46,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:46,274 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:46,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:51:46,274 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash -805744227, now seen corresponding path program 1 times [2021-05-02 17:51:46,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:46,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466257082] [2021-05-02 17:51:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,407 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 17:51:46,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:46,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466257082] [2021-05-02 17:51:46,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466257082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887904926] [2021-05-02 17:51:46,408 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 17:51:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:51:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:46,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,594 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 17:51:46,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887904926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:46,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:51:46,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334938176] [2021-05-02 17:51:46,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:46,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:46,602 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 17:51:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:46,647 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 17:51:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:51:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-02 17:51:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:46,648 INFO L225 Difference]: With dead ends: 18 [2021-05-02 17:51:46,648 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 17:51:46,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 17:51:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 17:51:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 17:51:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 17:51:46,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 17:51:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:46,652 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 17:51:46,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 17:51:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 17:51:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:51:46,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:46,653 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:46,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:51:46,880 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1285893439, now seen corresponding path program 2 times [2021-05-02 17:51:46,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:46,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023350669] [2021-05-02 17:51:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023350669] [2021-05-02 17:51:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023350669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284864654] [2021-05-02 17:51:46,996 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 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 17:51:47,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:47,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:51:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:47,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:47,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284864654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:47,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:51:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942050043] [2021-05-02 17:51:47,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:51:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:51:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:47,164 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 17:51:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:47,199 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 17:51:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:51:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2021-05-02 17:51:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:47,200 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:51:47,200 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 17:51:47,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 17:51:47,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 17:51:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 17:51:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 17:51:47,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 17:51:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:47,204 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 17:51:47,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 17:51:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 17:51:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:51:47,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:47,205 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:47,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:47,426 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1304995937, now seen corresponding path program 3 times [2021-05-02 17:51:47,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:47,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46427045] [2021-05-02 17:51:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:47,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:47,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46427045] [2021-05-02 17:51:47,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46427045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545808204] [2021-05-02 17:51:47,534 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 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 17:51:47,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:51:47,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:47,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:51:47,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:47,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545808204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:47,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:51:47,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899369405] [2021-05-02 17:51:47,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:51:47,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:47,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:51:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:47,689 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 17:51:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:47,732 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 17:51:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:51:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2021-05-02 17:51:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:47,733 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:51:47,733 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:51:47,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:51:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 17:51:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 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 17:51:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 17:51:47,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 17:51:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:47,742 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 17:51:47,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 17:51:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 17:51:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 17:51:47,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:47,743 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:47,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:47,961 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1812339965, now seen corresponding path program 4 times [2021-05-02 17:51:47,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:47,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100476791] [2021-05-02 17:51:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:48,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:48,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100476791] [2021-05-02 17:51:48,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100476791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267486166] [2021-05-02 17:51:48,040 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 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 17:51:48,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:48,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 17:51:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:48,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267486166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:48,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 17:51:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499246086] [2021-05-02 17:51:48,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:51:48,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:51:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:48,163 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 17:51:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:48,215 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 17:51:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:51:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2021-05-02 17:51:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:48,217 INFO L225 Difference]: With dead ends: 24 [2021-05-02 17:51:48,217 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:51:48,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:51:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 17:51:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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 17:51:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 17:51:48,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 17:51:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:48,224 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 17:51:48,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 17:51:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 17:51:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:51:48,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:48,229 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:48,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:48,453 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash 315030821, now seen corresponding path program 5 times [2021-05-02 17:51:48,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:48,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471433562] [2021-05-02 17:51:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:48,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:48,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471433562] [2021-05-02 17:51:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471433562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793840896] [2021-05-02 17:51:48,541 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 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 17:51:48,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:51:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:51:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:48,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793840896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:48,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:51:48,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659499061] [2021-05-02 17:51:48,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:51:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:51:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:48,671 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 17:51:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:48,705 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 17:51:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:51:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2021-05-02 17:51:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:48,707 INFO L225 Difference]: With dead ends: 26 [2021-05-02 17:51:48,707 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:51:48,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:51:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 17:51:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 17:51:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 17:51:48,710 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 17:51:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:48,710 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 17:51:48,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 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 17:51:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 17:51:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 17:51:48,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:48,711 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:48,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:51:48,925 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 313923271, now seen corresponding path program 6 times [2021-05-02 17:51:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097153237] [2021-05-02 17:51:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:49,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097153237] [2021-05-02 17:51:49,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097153237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776666475] [2021-05-02 17:51:49,035 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 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 17:51:49,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:51:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:51:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776666475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:49,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:51:49,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405745390] [2021-05-02 17:51:49,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:51:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:51:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:49,184 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 17:51:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:49,221 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 17:51:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:51:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 24 [2021-05-02 17:51:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:49,223 INFO L225 Difference]: With dead ends: 28 [2021-05-02 17:51:49,223 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 17:51:49,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 17:51:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 17:51:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 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 17:51:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 17:51:49,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 17:51:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:49,228 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 17:51:49,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 17:51:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 17:51:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:51:49,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:49,230 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:49,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:49,449 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -750432279, now seen corresponding path program 7 times [2021-05-02 17:51:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:49,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307020402] [2021-05-02 17:51:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307020402] [2021-05-02 17:51:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307020402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579126885] [2021-05-02 17:51:49,557 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 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 17:51:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:51:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:49,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579126885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:49,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:51:49,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361490849] [2021-05-02 17:51:49,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:51:49,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:51:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:51:49,700 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 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 17:51:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:49,757 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 17:51:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:51:49,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 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 26 [2021-05-02 17:51:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:49,761 INFO L225 Difference]: With dead ends: 30 [2021-05-02 17:51:49,761 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 17:51:49,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:51:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 17:51:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 17:51:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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 17:51:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 17:51:49,769 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 17:51:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:49,769 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 17:51:49,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 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 17:51:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 17:51:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:51:49,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:49,770 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:49,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:49,992 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1393899381, now seen corresponding path program 8 times [2021-05-02 17:51:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:49,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711036065] [2021-05-02 17:51:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:50,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711036065] [2021-05-02 17:51:50,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711036065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554685157] [2021-05-02 17:51:50,108 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 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 17:51:50,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:50,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:51:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:50,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554685157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:50,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 17:51:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855815344] [2021-05-02 17:51:50,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:51:50,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:51:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:50,242 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 17:51:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:50,315 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 17:51:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:51:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 28 [2021-05-02 17:51:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:50,316 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:51:50,316 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:51:50,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:51:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 17:51:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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 17:51:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 17:51:50,319 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 17:51:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:50,319 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 17:51:50,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 17:51:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 17:51:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:51:50,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:50,320 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:50,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:51:50,527 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1290493779, now seen corresponding path program 9 times [2021-05-02 17:51:50,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:50,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141750327] [2021-05-02 17:51:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:50,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:50,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141750327] [2021-05-02 17:51:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141750327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323151418] [2021-05-02 17:51:50,641 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 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 17:51:50,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 17:51:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 17:51:50,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:50,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:50,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323151418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:50,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 17:51:50,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391847978] [2021-05-02 17:51:50,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 17:51:50,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:50,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 17:51:50,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:51:50,816 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 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 17:51:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:50,865 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 17:51:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:51:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 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 30 [2021-05-02 17:51:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:50,867 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:51:50,867 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:51:50,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:51:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:51:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 17:51:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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 17:51:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 17:51:50,877 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 17:51:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:50,878 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 17:51:50,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 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 17:51:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 17:51:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:51:50,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:50,881 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:51,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:51,082 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:51,082 INFO L82 PathProgramCache]: Analyzing trace with hash -701958065, now seen corresponding path program 10 times [2021-05-02 17:51:51,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:51,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596356474] [2021-05-02 17:51:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:51,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:51,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596356474] [2021-05-02 17:51:51,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596356474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222815437] [2021-05-02 17:51:51,208 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 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 17:51:51,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:51,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:51:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:51,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:51,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222815437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:51,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:51,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 17:51:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104814646] [2021-05-02 17:51:51,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:51:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:51:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:51:51,357 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 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 17:51:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:51,423 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 17:51:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 17:51:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 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 32 [2021-05-02 17:51:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:51,425 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:51:51,425 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 17:51:51,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:51:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 17:51:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 17:51:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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 17:51:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 17:51:51,427 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 17:51:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:51,427 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 17:51:51,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 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 17:51:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 17:51:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:51:51,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:51,428 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:51,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:51,651 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2054819983, now seen corresponding path program 11 times [2021-05-02 17:51:51,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:51,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955740069] [2021-05-02 17:51:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:51,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:51,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955740069] [2021-05-02 17:51:51,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955740069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:51,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593962434] [2021-05-02 17:51:51,799 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 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 17:51:51,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 17:51:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:51,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 17:51:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:51,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593962434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:52,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 17:51:52,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798125438] [2021-05-02 17:51:52,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:51:52,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:52,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:51:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:52,010 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 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 17:51:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:52,068 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 17:51:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 17:51:52,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 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 34 [2021-05-02 17:51:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:52,069 INFO L225 Difference]: With dead ends: 38 [2021-05-02 17:51:52,069 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:51:52,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:51:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 17:51:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 17:51:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 17:51:52,072 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 17:51:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:52,072 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 17:51:52,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 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 17:51:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 17:51:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:51:52,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:52,073 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:52,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 17:51:52,281 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -780032493, now seen corresponding path program 12 times [2021-05-02 17:51:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:52,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890195488] [2021-05-02 17:51:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:52,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:52,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890195488] [2021-05-02 17:51:52,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890195488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589489310] [2021-05-02 17:51:52,428 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 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 17:51:52,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 17:51:52,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:51:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:52,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:52,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589489310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:52,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 17:51:52,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499388398] [2021-05-02 17:51:52,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:51:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:51:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:51:52,657 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 17:51:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:52,721 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 17:51:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:51:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 36 [2021-05-02 17:51:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:52,722 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:51:52,722 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:51:52,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:51:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:51:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:51:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 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 17:51:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 17:51:52,725 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 17:51:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:52,725 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 17:51:52,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 17:51:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 17:51:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:51:52,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:52,726 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:52,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:51:52,933 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 225066037, now seen corresponding path program 13 times [2021-05-02 17:51:52,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:52,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575346426] [2021-05-02 17:51:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575346426] [2021-05-02 17:51:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575346426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83406782] [2021-05-02 17:51:53,106 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 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 17:51:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:51:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:53,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83406782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:53,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 17:51:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191900505] [2021-05-02 17:51:53,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 17:51:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 17:51:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:51:53,257 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 17:51:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:53,326 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 17:51:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:51:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 38 [2021-05-02 17:51:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:53,327 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:51:53,327 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:51:53,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:51:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:51:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 17:51:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 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 17:51:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 17:51:53,329 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 17:51:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:53,330 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 17:51:53,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 17:51:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 17:51:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:51:53,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:53,330 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:53,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:51:53,552 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash -242888233, now seen corresponding path program 14 times [2021-05-02 17:51:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957711638] [2021-05-02 17:51:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957711638] [2021-05-02 17:51:53,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957711638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167097493] [2021-05-02 17:51:53,720 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 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 17:51:53,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 17:51:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:53,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167097493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:53,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 17:51:53,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027603360] [2021-05-02 17:51:53,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 17:51:53,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 17:51:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:51:53,867 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 17:51:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:53,936 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 17:51:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 17:51:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 40 [2021-05-02 17:51:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:53,936 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:51:53,936 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 17:51:53,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:51:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 17:51:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 17:51:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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 17:51:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 17:51:53,940 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 17:51:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:53,940 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 17:51:53,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 17:51:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 17:51:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 17:51:53,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:53,941 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:54,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:54,145 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1024624377, now seen corresponding path program 15 times [2021-05-02 17:51:54,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:54,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040981149] [2021-05-02 17:51:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:54,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:54,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040981149] [2021-05-02 17:51:54,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040981149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737318752] [2021-05-02 17:51:54,334 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 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 17:51:54,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 17:51:54,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:51:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:54,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:54,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737318752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:54,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 17:51:54,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308519874] [2021-05-02 17:51:54,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 17:51:54,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:54,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 17:51:54,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:51:54,571 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 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 17:51:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:54,649 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 17:51:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:51:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 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 42 [2021-05-02 17:51:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:54,650 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:51:54,650 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 17:51:54,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:51:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 17:51:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 17:51:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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 17:51:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 17:51:54,653 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 17:51:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:54,653 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 17:51:54,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 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 17:51:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 17:51:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:51:54,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:54,654 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:54,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 17:51:54,857 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash -666469477, now seen corresponding path program 16 times [2021-05-02 17:51:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:54,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982011469] [2021-05-02 17:51:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982011469] [2021-05-02 17:51:55,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982011469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821831186] [2021-05-02 17:51:55,055 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 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 17:51:55,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:55,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:55,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:51:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:55,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821831186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:55,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 17:51:55,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825507635] [2021-05-02 17:51:55,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:51:55,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:51:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:51:55,246 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 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 17:51:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:55,330 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 17:51:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 17:51:55,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 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 44 [2021-05-02 17:51:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:55,331 INFO L225 Difference]: With dead ends: 48 [2021-05-02 17:51:55,331 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:51:55,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:51:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:51:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 17:51:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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 17:51:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 17:51:55,334 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 17:51:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:55,334 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 17:51:55,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 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 17:51:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 17:51:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 17:51:55,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:55,335 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:55,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:51:55,541 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1984942013, now seen corresponding path program 17 times [2021-05-02 17:51:55,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:55,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977654456] [2021-05-02 17:51:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977654456] [2021-05-02 17:51:55,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977654456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107233386] [2021-05-02 17:51:55,797 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 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 17:51:55,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 17:51:55,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:51:55,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:55,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:56,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107233386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:56,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:56,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 17:51:56,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18859398] [2021-05-02 17:51:56,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:51:56,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:51:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:51:56,065 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 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 17:51:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:56,152 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 17:51:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:51:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 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 46 [2021-05-02 17:51:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:56,153 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:51:56,153 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 17:51:56,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:51:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 17:51:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 17:51:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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 17:51:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 17:51:56,156 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 17:51:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:56,156 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 17:51:56,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 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 17:51:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 17:51:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 17:51:56,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:56,157 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:56,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:56,381 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1219189921, now seen corresponding path program 18 times [2021-05-02 17:51:56,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:56,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178414988] [2021-05-02 17:51:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:56,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:56,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178414988] [2021-05-02 17:51:56,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178414988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:56,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897861817] [2021-05-02 17:51:56,633 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 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 17:51:56,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 17:51:56,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:51:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:57,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897861817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:57,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 17:51:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747539468] [2021-05-02 17:51:57,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:51:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:57,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:51:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:51:57,028 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 17:51:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:57,156 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 17:51:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:51:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 48 [2021-05-02 17:51:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:57,157 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:51:57,157 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 17:51:57,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:51:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 17:51:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 17:51:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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 17:51:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 17:51:57,168 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 17:51:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:57,170 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 17:51:57,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 17:51:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 17:51:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 17:51:57,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:57,171 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:57,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:57,385 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -898427263, now seen corresponding path program 19 times [2021-05-02 17:51:57,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:57,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358543796] [2021-05-02 17:51:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:57,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358543796] [2021-05-02 17:51:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358543796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379977700] [2021-05-02 17:51:57,650 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 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 17:51:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 17:51:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:57,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379977700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:57,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 17:51:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280779727] [2021-05-02 17:51:57,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:51:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:51:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:51:57,819 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 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 17:51:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:57,899 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 17:51:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:51:57,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 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 50 [2021-05-02 17:51:57,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:57,900 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:51:57,900 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 17:51:57,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:51:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 17:51:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 17:51:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 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 17:51:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 17:51:57,903 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 17:51:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:57,904 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 17:51:57,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 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 17:51:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 17:51:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 17:51:57,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:57,905 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:58,125 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1883158237, now seen corresponding path program 20 times [2021-05-02 17:51:58,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409756991] [2021-05-02 17:51:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:58,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409756991] [2021-05-02 17:51:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409756991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576309630] [2021-05-02 17:51:58,398 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 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 17:51:58,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:58,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:51:58,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:58,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:58,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576309630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:58,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 17:51:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856802778] [2021-05-02 17:51:58,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:51:58,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:51:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:51:58,601 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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 17:51:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,673 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 17:51:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 17:51:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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 52 [2021-05-02 17:51:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,674 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:51:58,674 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:51:58,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:51:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:51:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 17:51:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 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 17:51:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 17:51:58,676 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 17:51:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,677 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 17:51:58,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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 17:51:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 17:51:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:51:58,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,677 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 17:51:58,898 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash 978148165, now seen corresponding path program 21 times [2021-05-02 17:51:58,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587908274] [2021-05-02 17:51:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:59,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587908274] [2021-05-02 17:51:59,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587908274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058617907] [2021-05-02 17:51:59,186 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 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 17:51:59,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 17:51:59,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:51:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:59,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:59,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058617907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:59,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 17:51:59,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347300806] [2021-05-02 17:51:59,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 17:51:59,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 17:51:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:51:59,577 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 17:51:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:59,661 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 17:51:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:51:59,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 54 [2021-05-02 17:51:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:59,662 INFO L225 Difference]: With dead ends: 58 [2021-05-02 17:51:59,662 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 17:51:59,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:51:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 17:51:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 17:51:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 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 17:51:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 17:51:59,665 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 17:51:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:59,666 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 17:51:59,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 17:51:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 17:51:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:51:59,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:59,666 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:59,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 17:51:59,881 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1914531047, now seen corresponding path program 22 times [2021-05-02 17:51:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618984382] [2021-05-02 17:51:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:00,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:00,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618984382] [2021-05-02 17:52:00,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618984382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127862636] [2021-05-02 17:52:00,179 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 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 17:52:00,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:00,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:52:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:00,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:00,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127862636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:00,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 17:52:00,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287680634] [2021-05-02 17:52:00,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 17:52:00,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:00,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 17:52:00,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:52:00,367 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 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 17:52:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:00,472 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 17:52:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 17:52:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 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 56 [2021-05-02 17:52:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:00,473 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:52:00,473 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 17:52:00,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:52:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 17:52:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 17:52:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 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 17:52:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 17:52:00,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 17:52:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:00,478 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 17:52:00,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 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 17:52:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 17:52:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:52:00,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:00,478 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:00,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:00,693 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -164651511, now seen corresponding path program 23 times [2021-05-02 17:52:00,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:00,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37745835] [2021-05-02 17:52:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:01,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37745835] [2021-05-02 17:52:01,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37745835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102302304] [2021-05-02 17:52:01,050 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 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 17:52:01,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 17:52:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 17:52:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:01,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102302304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:01,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 17:52:01,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791318391] [2021-05-02 17:52:01,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:52:01,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:52:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:52:01,547 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 17:52:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:01,651 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 17:52:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:52:01,652 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 58 [2021-05-02 17:52:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:01,652 INFO L225 Difference]: With dead ends: 62 [2021-05-02 17:52:01,652 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 17:52:01,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:52:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 17:52:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 17:52:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 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 17:52:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 17:52:01,655 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 17:52:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:01,655 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 17:52:01,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 17:52:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 17:52:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 17:52:01,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:01,656 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:01,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 17:52:01,869 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1099297109, now seen corresponding path program 24 times [2021-05-02 17:52:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:01,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969652259] [2021-05-02 17:52:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:02,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969652259] [2021-05-02 17:52:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969652259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241498761] [2021-05-02 17:52:02,220 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 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 17:52:04,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 17:52:04,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:52:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:04,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:04,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241498761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:04,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 17:52:04,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593822491] [2021-05-02 17:52:04,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:52:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:52:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:04,335 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 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 17:52:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:04,482 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 17:52:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:52:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 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 60 [2021-05-02 17:52:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:04,483 INFO L225 Difference]: With dead ends: 64 [2021-05-02 17:52:04,483 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 17:52:04,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 17:52:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 17:52:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 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 17:52:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 17:52:04,485 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 17:52:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:04,486 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 17:52:04,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 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 17:52:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 17:52:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 17:52:04,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:04,486 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:04,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:04,705 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1645551923, now seen corresponding path program 25 times [2021-05-02 17:52:04,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:04,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076398159] [2021-05-02 17:52:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:05,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:05,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076398159] [2021-05-02 17:52:05,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076398159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689331633] [2021-05-02 17:52:05,099 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 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 17:52:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:52:05,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:05,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,279 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 17:52:05,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:05,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689331633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:05,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 17:52:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627583806] [2021-05-02 17:52:05,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:52:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:52:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:52:05,293 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 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 17:52:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:05,416 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 17:52:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 17:52:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 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 62 [2021-05-02 17:52:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:05,417 INFO L225 Difference]: With dead ends: 66 [2021-05-02 17:52:05,418 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 17:52:05,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:52:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 17:52:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 17:52:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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 17:52:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 17:52:05,426 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 17:52:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:05,426 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 17:52:05,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 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 17:52:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 17:52:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 17:52:05,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:05,429 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:05,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 17:52:05,649 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1684549231, now seen corresponding path program 26 times [2021-05-02 17:52:05,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:05,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810847320] [2021-05-02 17:52:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:06,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810847320] [2021-05-02 17:52:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810847320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070864283] [2021-05-02 17:52:06,074 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 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 17:52:06,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:52:06,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:06,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:06,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070864283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:06,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 17:52:06,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884488611] [2021-05-02 17:52:06,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:52:06,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:06,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:52:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:06,285 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 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 17:52:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:06,373 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 17:52:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 17:52:06,373 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 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 64 [2021-05-02 17:52:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:06,374 INFO L225 Difference]: With dead ends: 68 [2021-05-02 17:52:06,374 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 17:52:06,374 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 17:52:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 17:52:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 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 17:52:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 17:52:06,375 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 17:52:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:06,375 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 17:52:06,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 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 17:52:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 17:52:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 17:52:06,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:06,376 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:06,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 17:52:06,577 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2133844591, now seen corresponding path program 27 times [2021-05-02 17:52:06,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:06,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095472575] [2021-05-02 17:52:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:06,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095472575] [2021-05-02 17:52:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095472575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932978481] [2021-05-02 17:52:06,989 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 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 17:52:07,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 17:52:07,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:07,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:52:07,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:07,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:07,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932978481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:07,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 17:52:07,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170819901] [2021-05-02 17:52:07,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:52:07,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:07,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:52:07,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:07,521 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 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 17:52:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:07,658 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 17:52:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 17:52:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 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 66 [2021-05-02 17:52:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:07,659 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:52:07,660 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 17:52:07,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 17:52:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 17:52:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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 17:52:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 17:52:07,662 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 17:52:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:07,662 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 17:52:07,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 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 17:52:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 17:52:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:52:07,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:07,663 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:07,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:52:07,869 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash 586730547, now seen corresponding path program 28 times [2021-05-02 17:52:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:07,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475888090] [2021-05-02 17:52:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:08,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475888090] [2021-05-02 17:52:08,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475888090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119858916] [2021-05-02 17:52:08,337 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 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 17:52:08,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:08,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:52:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:08,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119858916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:08,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 17:52:08,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461857123] [2021-05-02 17:52:08,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:52:08,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:08,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:52:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:52:08,557 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 17:52:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:08,707 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 17:52:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 17:52:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 68 [2021-05-02 17:52:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:08,708 INFO L225 Difference]: With dead ends: 72 [2021-05-02 17:52:08,708 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:52:08,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:52:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:52:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 17:52:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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 17:52:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 17:52:08,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 17:52:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:08,711 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 17:52:08,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 17:52:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 17:52:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 17:52:08,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:08,712 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:08,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:08,925 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -575645099, now seen corresponding path program 29 times [2021-05-02 17:52:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:08,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823209823] [2021-05-02 17:52:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:09,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823209823] [2021-05-02 17:52:09,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823209823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555504181] [2021-05-02 17:52:09,354 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 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 17:52:09,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 17:52:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:52:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:10,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:10,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555504181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:10,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:10,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 17:52:10,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679393587] [2021-05-02 17:52:10,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:52:10,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:10,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:52:10,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:10,125 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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 17:52:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:10,262 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 17:52:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:52:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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 70 [2021-05-02 17:52:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:10,263 INFO L225 Difference]: With dead ends: 74 [2021-05-02 17:52:10,263 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 17:52:10,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 17:52:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 17:52:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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 17:52:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 17:52:10,265 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 17:52:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:10,266 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 17:52:10,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 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 17:52:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 17:52:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 17:52:10,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:10,266 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:10,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 17:52:10,477 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -927143945, now seen corresponding path program 30 times [2021-05-02 17:52:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872767761] [2021-05-02 17:52:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:10,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:10,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:10,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872767761] [2021-05-02 17:52:10,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872767761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828097089] [2021-05-02 17:52:10,927 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 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 17:52:13,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 17:52:13,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 17:52:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:13,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:13,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828097089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:13,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:13,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 17:52:13,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843794340] [2021-05-02 17:52:13,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:13,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:13,732 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 17:52:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:13,880 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 17:52:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 72 [2021-05-02 17:52:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:13,881 INFO L225 Difference]: With dead ends: 76 [2021-05-02 17:52:13,881 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 17:52:13,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 17:52:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 17:52:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 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 17:52:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 17:52:13,883 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 17:52:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:13,883 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 17:52:13,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 17:52:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 17:52:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 17:52:13,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:13,884 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:14,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:14,089 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash 584881433, now seen corresponding path program 31 times [2021-05-02 17:52:14,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:14,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874429318] [2021-05-02 17:52:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:14,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874429318] [2021-05-02 17:52:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874429318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424126417] [2021-05-02 17:52:14,602 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 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 17:52:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:52:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,708 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 17:52:14,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:14,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424126417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:14,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:14,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 17:52:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206095748] [2021-05-02 17:52:14,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:52:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:52:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:14,843 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 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 17:52:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:14,991 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 17:52:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:52:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 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 74 [2021-05-02 17:52:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:14,992 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:52:14,992 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 17:52:14,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 17:52:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 17:52:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 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 17:52:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 17:52:14,996 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 17:52:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:14,996 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 17:52:14,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 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 17:52:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 17:52:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 17:52:14,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:14,997 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:15,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 17:52:15,213 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1942323643, now seen corresponding path program 32 times [2021-05-02 17:52:15,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:15,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455433398] [2021-05-02 17:52:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:15,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:15,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:15,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455433398] [2021-05-02 17:52:15,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455433398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:15,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838147594] [2021-05-02 17:52:15,797 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 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 17:52:15,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:15,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:52:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:15,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:16,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838147594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:16,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:16,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 17:52:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941325254] [2021-05-02 17:52:16,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:52:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:52:16,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:16,004 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 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 17:52:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:16,117 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 17:52:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:52:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 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 76 [2021-05-02 17:52:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:16,118 INFO L225 Difference]: With dead ends: 80 [2021-05-02 17:52:16,118 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 17:52:16,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 17:52:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 17:52:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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 17:52:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 17:52:16,120 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 17:52:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:16,120 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 17:52:16,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 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 17:52:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 17:52:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 17:52:16,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:16,120 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:16,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 17:52:16,321 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 774229469, now seen corresponding path program 33 times [2021-05-02 17:52:16,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:16,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47678591] [2021-05-02 17:52:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:16,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:16,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47678591] [2021-05-02 17:52:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47678591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840209811] [2021-05-02 17:52:16,882 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 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 17:52:17,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 17:52:17,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:17,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:52:17,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:17,482 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 17:52:17,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,500 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 17:52:17,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,517 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 17:52:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,538 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 17:52:17,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:17,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840209811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:17,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:17,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 17:52:17,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445264594] [2021-05-02 17:52:17,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 17:52:17,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 17:52:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:17,625 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 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 17:52:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:17,770 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 17:52:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 17:52:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 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 78 [2021-05-02 17:52:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:17,771 INFO L225 Difference]: With dead ends: 82 [2021-05-02 17:52:17,771 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 17:52:17,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 17:52:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 17:52:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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 17:52:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 17:52:17,773 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 17:52:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:17,773 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 17:52:17,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 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 17:52:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 17:52:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 17:52:17,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:17,774 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:17,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 17:52:17,977 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -777807489, now seen corresponding path program 34 times [2021-05-02 17:52:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:17,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104724034] [2021-05-02 17:52:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:18,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:18,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:18,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104724034] [2021-05-02 17:52:18,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104724034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:18,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976875113] [2021-05-02 17:52:18,568 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 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 17:52:18,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:18,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:52:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:18,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:18,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976875113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:18,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:18,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 17:52:18,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100468560] [2021-05-02 17:52:18,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 17:52:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:18,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 17:52:18,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:52:18,830 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 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 17:52:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:18,978 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 17:52:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 17:52:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 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 80 [2021-05-02 17:52:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:18,979 INFO L225 Difference]: With dead ends: 84 [2021-05-02 17:52:18,979 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 17:52:18,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:52:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 17:52:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 17:52:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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 17:52:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 17:52:18,981 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 17:52:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:18,981 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 17:52:18,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 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 17:52:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 17:52:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 17:52:18,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:18,982 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:19,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:52:19,193 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:19,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1931672415, now seen corresponding path program 35 times [2021-05-02 17:52:19,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:19,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515928855] [2021-05-02 17:52:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:19,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:19,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:19,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515928855] [2021-05-02 17:52:19,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515928855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:19,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745815467] [2021-05-02 17:52:19,789 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 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 17:52:29,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 17:52:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:52:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:29,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745815467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:29,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:29,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 17:52:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546407627] [2021-05-02 17:52:29,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:52:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:52:29,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:29,623 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 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 17:52:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:29,767 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 17:52:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:52:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 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 82 [2021-05-02 17:52:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:29,768 INFO L225 Difference]: With dead ends: 86 [2021-05-02 17:52:29,768 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 17:52:29,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 543.3ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 17:52:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 17:52:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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 17:52:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 17:52:29,770 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 17:52:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:29,770 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 17:52:29,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 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 17:52:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 17:52:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 17:52:29,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:29,771 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:29,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 17:52:29,989 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1600663363, now seen corresponding path program 36 times [2021-05-02 17:52:29,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:29,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720953185] [2021-05-02 17:52:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:30,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:30,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720953185] [2021-05-02 17:52:30,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720953185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:30,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469299245] [2021-05-02 17:52:30,638 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 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 17:52:39,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 17:52:39,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:52:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:39,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:39,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469299245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:39,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:39,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 17:52:39,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267568072] [2021-05-02 17:52:39,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:52:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:52:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:39,182 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 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 17:52:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:39,335 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 17:52:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:52:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 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 84 [2021-05-02 17:52:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:39,336 INFO L225 Difference]: With dead ends: 88 [2021-05-02 17:52:39,336 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 17:52:39,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 17:52:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 17:52:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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 17:52:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 17:52:39,339 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 17:52:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:39,339 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 17:52:39,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 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 17:52:39,339 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 17:52:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 17:52:39,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:39,339 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:39,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 17:52:39,549 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1143785115, now seen corresponding path program 37 times [2021-05-02 17:52:39,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:39,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400412462] [2021-05-02 17:52:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:40,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:40,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:40,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400412462] [2021-05-02 17:52:40,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400412462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:40,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761255655] [2021-05-02 17:52:40,221 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 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 17:52:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:52:40,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:40,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:40,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761255655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:40,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:40,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 17:52:40,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953284573] [2021-05-02 17:52:40,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 17:52:40,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 17:52:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:52:40,486 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 17:52:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:40,597 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 17:52:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 17:52:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 86 [2021-05-02 17:52:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:40,598 INFO L225 Difference]: With dead ends: 90 [2021-05-02 17:52:40,599 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 17:52:40,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:52:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 17:52:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 17:52:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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 17:52:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 17:52:40,601 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 17:52:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:40,601 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 17:52:40,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 17:52:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 17:52:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 17:52:40,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:40,602 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:40,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 17:52:40,809 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:40,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1448852729, now seen corresponding path program 38 times [2021-05-02 17:52:40,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:40,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134545117] [2021-05-02 17:52:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:41,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:41,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:41,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134545117] [2021-05-02 17:52:41,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134545117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:41,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694950317] [2021-05-02 17:52:41,548 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 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 17:52:41,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:41,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:52:41,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:41,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694950317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:41,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:41,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 17:52:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338758988] [2021-05-02 17:52:41,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 17:52:41,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 17:52:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:41,776 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 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 17:52:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:41,947 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 17:52:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:52:41,948 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 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 88 [2021-05-02 17:52:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:41,948 INFO L225 Difference]: With dead ends: 92 [2021-05-02 17:52:41,949 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 17:52:41,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 17:52:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 17:52:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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 17:52:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 17:52:41,951 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 17:52:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:41,952 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 17:52:41,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 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 17:52:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 17:52:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 17:52:41,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:41,952 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:42,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 17:52:42,169 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1733913641, now seen corresponding path program 39 times [2021-05-02 17:52:42,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:42,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461941602] [2021-05-02 17:52:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:42,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:42,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:42,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461941602] [2021-05-02 17:52:42,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461941602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:42,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648675047] [2021-05-02 17:52:42,954 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 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 17:52:44,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 17:52:44,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:44,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:52:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:44,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648675047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:44,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:44,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 17:52:44,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362593660] [2021-05-02 17:52:44,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:52:44,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:52:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:52:44,424 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 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 17:52:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:44,592 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 17:52:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:52:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 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 90 [2021-05-02 17:52:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:44,593 INFO L225 Difference]: With dead ends: 94 [2021-05-02 17:52:44,593 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 17:52:44,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:52:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 17:52:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 17:52:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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 17:52:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 17:52:44,596 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 17:52:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:44,596 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 17:52:44,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 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 17:52:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 17:52:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 17:52:44,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:44,597 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:44,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:44,809 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1939286837, now seen corresponding path program 40 times [2021-05-02 17:52:44,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:44,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627025053] [2021-05-02 17:52:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:45,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:45,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627025053] [2021-05-02 17:52:45,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627025053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:45,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800704704] [2021-05-02 17:52:45,542 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 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 17:52:45,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:52:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:45,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800704704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:45,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:45,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 17:52:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585938238] [2021-05-02 17:52:45,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 17:52:45,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 17:52:45,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:52:45,800 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 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 17:52:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:45,936 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 17:52:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 17:52:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 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 92 [2021-05-02 17:52:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:45,937 INFO L225 Difference]: With dead ends: 96 [2021-05-02 17:52:45,937 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 17:52:45,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 687.7ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:52:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 17:52:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 17:52:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 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 17:52:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 17:52:45,942 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 17:52:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:45,942 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 17:52:45,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 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 17:52:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 17:52:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 17:52:45,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:45,943 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:46,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:46,167 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1421828883, now seen corresponding path program 41 times [2021-05-02 17:52:46,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:46,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890461618] [2021-05-02 17:52:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:46,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:46,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:46,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890461618] [2021-05-02 17:52:46,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890461618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:46,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859579481] [2021-05-02 17:52:46,935 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 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 17:52:58,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 17:52:58,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:52:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:58,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:59,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859579481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:59,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:59,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 17:52:59,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284491259] [2021-05-02 17:52:59,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 17:52:59,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 17:52:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:52:59,128 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 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 17:52:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:59,268 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 17:52:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:52:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 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 94 [2021-05-02 17:52:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:59,271 INFO L225 Difference]: With dead ends: 98 [2021-05-02 17:52:59,271 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 17:52:59,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:52:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 17:52:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 17:52:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 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 17:52:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 17:52:59,273 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 17:52:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:59,273 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 17:52:59,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 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 17:52:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 17:52:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 17:52:59,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:59,274 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:59,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 17:52:59,501 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1934025871, now seen corresponding path program 42 times [2021-05-02 17:52:59,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:59,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985187098] [2021-05-02 17:52:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:00,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:00,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985187098] [2021-05-02 17:53:00,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985187098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185421611] [2021-05-02 17:53:00,356 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 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 17:53:10,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 17:53:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:53:10,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:10,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:11,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185421611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:11,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:11,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 17:53:11,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507986605] [2021-05-02 17:53:11,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:53:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:53:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:11,145 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 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 17:53:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:11,304 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 17:53:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:53:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 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 96 [2021-05-02 17:53:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:11,305 INFO L225 Difference]: With dead ends: 100 [2021-05-02 17:53:11,305 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 17:53:11,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 801.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 17:53:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 17:53:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 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 17:53:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 17:53:11,307 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 17:53:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:11,307 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 17:53:11,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 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 17:53:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 17:53:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 17:53:11,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:11,308 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:11,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:11,508 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1390005169, now seen corresponding path program 43 times [2021-05-02 17:53:11,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:11,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736589599] [2021-05-02 17:53:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:12,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736589599] [2021-05-02 17:53:12,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736589599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666248556] [2021-05-02 17:53:12,367 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 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 17:53:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:12,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:53:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:12,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666248556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:12,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:12,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 17:53:12,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74151846] [2021-05-02 17:53:12,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 17:53:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 17:53:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:53:12,629 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 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 17:53:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:12,821 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 17:53:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 17:53:12,821 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 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 98 [2021-05-02 17:53:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:12,822 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:53:12,822 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 17:53:12,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:53:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 17:53:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 17:53:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 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 17:53:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 17:53:12,824 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 17:53:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:12,824 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 17:53:12,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 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 17:53:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 17:53:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 17:53:12,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:12,825 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:13,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:13,029 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1722846637, now seen corresponding path program 44 times [2021-05-02 17:53:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:13,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431261140] [2021-05-02 17:53:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:13,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:13,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:13,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431261140] [2021-05-02 17:53:13,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431261140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:13,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909014758] [2021-05-02 17:53:13,964 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 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 17:53:14,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:53:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 17:53:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:14,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:14,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909014758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:14,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:14,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 17:53:14,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841007736] [2021-05-02 17:53:14,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 17:53:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 17:53:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:53:14,237 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 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 17:53:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:14,375 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 17:53:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 17:53:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 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 100 [2021-05-02 17:53:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:14,376 INFO L225 Difference]: With dead ends: 104 [2021-05-02 17:53:14,376 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 17:53:14,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 879.6ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:53:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 17:53:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 17:53:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 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 17:53:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 17:53:14,378 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 17:53:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:14,378 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 17:53:14,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 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 17:53:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 17:53:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 17:53:14,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:14,379 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:14,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 17:53:14,585 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash 418773109, now seen corresponding path program 45 times [2021-05-02 17:53:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:14,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373923528] [2021-05-02 17:53:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:15,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:15,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:15,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373923528] [2021-05-02 17:53:15,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373923528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:15,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464104758] [2021-05-02 17:53:15,502 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 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 17:53:17,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 17:53:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:53:17,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:17,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464104758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:17,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:17,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 17:53:17,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893963888] [2021-05-02 17:53:17,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 17:53:17,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 17:53:17,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:53:17,543 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 17:53:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:17,675 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 17:53:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:53:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 102 [2021-05-02 17:53:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:17,676 INFO L225 Difference]: With dead ends: 106 [2021-05-02 17:53:17,676 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 17:53:17,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 864.2ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:53:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 17:53:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 17:53:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 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 17:53:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 17:53:17,678 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 17:53:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:17,679 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 17:53:17,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 17:53:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 17:53:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 17:53:17,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:17,679 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:17,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 17:53:17,905 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1226014231, now seen corresponding path program 46 times [2021-05-02 17:53:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:17,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071929907] [2021-05-02 17:53:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:18,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:18,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071929907] [2021-05-02 17:53:18,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071929907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009207545] [2021-05-02 17:53:18,937 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 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 17:53:19,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:53:19,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:19,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 17:53:19,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:19,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009207545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:19,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:19,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 17:53:19,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253319908] [2021-05-02 17:53:19,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 17:53:19,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:19,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 17:53:19,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 17:53:19,210 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 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 17:53:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:19,441 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 17:53:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 17:53:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 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 104 [2021-05-02 17:53:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:19,442 INFO L225 Difference]: With dead ends: 108 [2021-05-02 17:53:19,442 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 17:53:19,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 975.0ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 17:53:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 17:53:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 17:53:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 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 17:53:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 17:53:19,446 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 17:53:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:19,446 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 17:53:19,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 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 17:53:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 17:53:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 17:53:19,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:19,447 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:19,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 17:53:19,669 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash -404348103, now seen corresponding path program 47 times [2021-05-02 17:53:19,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:19,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547333159] [2021-05-02 17:53:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:20,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:20,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547333159] [2021-05-02 17:53:20,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547333159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:20,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136128930] [2021-05-02 17:53:20,645 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 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 17:54:08,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 17:54:08,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:54:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:09,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136128930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:09,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:09,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 17:54:09,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903940438] [2021-05-02 17:54:09,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 17:54:09,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 17:54:09,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:54:09,169 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 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 17:54:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:09,406 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 17:54:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 17:54:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 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 106 [2021-05-02 17:54:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:09,407 INFO L225 Difference]: With dead ends: 110 [2021-05-02 17:54:09,407 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 17:54:09,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 922.0ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:54:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 17:54:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 17:54:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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 17:54:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 17:54:09,414 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 17:54:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:09,414 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 17:54:09,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 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 17:54:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 17:54:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 17:54:09,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:09,415 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:09,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:09,636 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash 480511963, now seen corresponding path program 48 times [2021-05-02 17:54:09,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:09,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838293054] [2021-05-02 17:54:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:10,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:10,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838293054] [2021-05-02 17:54:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838293054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918012548] [2021-05-02 17:54:10,650 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 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 17:54:44,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 17:54:44,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:44,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:54:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:44,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918012548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:44,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:44,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 17:54:44,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72309577] [2021-05-02 17:54:44,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:54:44,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:44,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:54:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:54:44,280 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 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 17:54:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:44,518 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 17:54:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:54:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 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 108 [2021-05-02 17:54:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:44,519 INFO L225 Difference]: With dead ends: 112 [2021-05-02 17:54:44,519 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 17:54:44,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:54:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 17:54:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 17:54:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 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 17:54:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 17:54:44,521 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 17:54:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:44,522 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 17:54:44,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 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 17:54:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 17:54:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 17:54:44,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:44,522 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:44,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 17:54:44,749 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 427510781, now seen corresponding path program 49 times [2021-05-02 17:54:44,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:44,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101368816] [2021-05-02 17:54:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:45,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:45,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101368816] [2021-05-02 17:54:45,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101368816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:45,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084401959] [2021-05-02 17:54:45,878 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 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 17:54:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:54:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:45,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:46,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084401959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:46,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:46,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 17:54:46,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048337781] [2021-05-02 17:54:46,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 17:54:46,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 17:54:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:54:46,158 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 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 17:54:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:46,336 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 17:54:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 17:54:46,337 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 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 110 [2021-05-02 17:54:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:46,338 INFO L225 Difference]: With dead ends: 114 [2021-05-02 17:54:46,338 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 17:54:46,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1051.9ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:54:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 17:54:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 17:54:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 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 17:54:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 17:54:46,340 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 17:54:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:46,340 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 17:54:46,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 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 17:54:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 17:54:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 17:54:46,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:46,341 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:46,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:46,553 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1032982431, now seen corresponding path program 50 times [2021-05-02 17:54:46,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:46,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810680165] [2021-05-02 17:54:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:47,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:47,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810680165] [2021-05-02 17:54:47,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810680165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:47,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040430927] [2021-05-02 17:54:47,658 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 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 17:54:47,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:54:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 17:54:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:47,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040430927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:47,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:47,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 17:54:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718686613] [2021-05-02 17:54:47,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 17:54:47,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 17:54:47,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:54:47,953 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 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 17:54:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:48,083 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 17:54:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:54:48,083 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 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 112 [2021-05-02 17:54:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:48,084 INFO L225 Difference]: With dead ends: 116 [2021-05-02 17:54:48,084 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 17:54:48,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1042.7ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:54:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 17:54:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 17:54:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 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 17:54:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 17:54:48,087 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 17:54:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:48,087 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 17:54:48,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 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 17:54:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 17:54:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 17:54:48,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:48,088 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:48,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:48,301 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1224314175, now seen corresponding path program 51 times [2021-05-02 17:54:48,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:48,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037050474] [2021-05-02 17:54:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:49,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:49,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037050474] [2021-05-02 17:54:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037050474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:49,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424617288] [2021-05-02 17:54:49,503 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 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 17:54:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 17:54:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 17:54:53,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:53,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:53,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424617288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:53,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:53,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 17:54:53,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587982354] [2021-05-02 17:54:53,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 17:54:53,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:53,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 17:54:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 17:54:53,558 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 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 17:54:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:53,772 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 17:54:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 17:54:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 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 114 [2021-05-02 17:54:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:53,773 INFO L225 Difference]: With dead ends: 118 [2021-05-02 17:54:53,773 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 17:54:53,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1137.2ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 17:54:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 17:54:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 17:54:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 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 17:54:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 17:54:53,776 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 17:54:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:53,776 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 17:54:53,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 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 17:54:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 17:54:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 17:54:53,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:53,777 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:53,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 17:54:53,985 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1527868061, now seen corresponding path program 52 times [2021-05-02 17:54:53,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:53,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357322333] [2021-05-02 17:54:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:55,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:55,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:55,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357322333] [2021-05-02 17:54:55,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357322333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:55,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376590645] [2021-05-02 17:54:55,140 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 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 17:54:55,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:54:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 17:54:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:55,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:55,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376590645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:55,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:55,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2021-05-02 17:54:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241679589] [2021-05-02 17:54:55,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 17:54:55,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 17:54:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 17:54:55,465 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 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 17:54:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:55,715 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 17:54:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 17:54:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 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 116 [2021-05-02 17:54:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:55,716 INFO L225 Difference]: With dead ends: 120 [2021-05-02 17:54:55,716 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 17:54:55,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 17:54:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 17:54:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 17:54:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 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 17:54:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 17:54:55,720 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 17:54:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:55,720 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 17:54:55,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 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 17:54:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 17:54:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 17:54:55,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:55,721 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:55,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:55,937 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1185376379, now seen corresponding path program 53 times [2021-05-02 17:54:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:55,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011057476] [2021-05-02 17:54:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:57,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:57,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011057476] [2021-05-02 17:54:57,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011057476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:57,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835708329] [2021-05-02 17:54:57,129 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:47,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 17:57:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 17:57:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:47,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:47,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835708329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:47,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:47,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 17:57:47,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676274510] [2021-05-02 17:57:47,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 17:57:47,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 17:57:47,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 17:57:47,979 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 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 17:57:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:48,191 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 17:57:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 17:57:48,192 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 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 118 [2021-05-02 17:57:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:48,192 INFO L225 Difference]: With dead ends: 122 [2021-05-02 17:57:48,192 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 17:57:48,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1141.4ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 17:57:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 17:57:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 17:57:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 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 17:57:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 17:57:48,195 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 17:57:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:48,195 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 17:57:48,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 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 17:57:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 17:57:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 17:57:48,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:48,196 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:48,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 17:57:48,409 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1531615527, now seen corresponding path program 54 times [2021-05-02 17:57:48,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:48,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110199753] [2021-05-02 17:57:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:49,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:49,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110199753] [2021-05-02 17:57:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110199753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941179014] [2021-05-02 17:57:49,647 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:37,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 17:58:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:37,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 17:58:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:37,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941179014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:37,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:37,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2021-05-02 17:58:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117713316] [2021-05-02 17:58:37,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 17:58:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 17:58:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 17:58:37,966 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 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 17:58:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:38,101 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 17:58:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 17:58:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 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 120 [2021-05-02 17:58:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:38,102 INFO L225 Difference]: With dead ends: 124 [2021-05-02 17:58:38,102 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 17:58:38,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1173.4ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 17:58:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 17:58:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 17:58:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 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 17:58:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 17:58:38,105 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 17:58:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:38,105 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 17:58:38,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 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 17:58:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 17:58:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 17:58:38,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:38,106 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:38,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 17:58:38,333 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1220721225, now seen corresponding path program 55 times [2021-05-02 17:58:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:38,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295385844] [2021-05-02 17:58:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:39,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:39,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:39,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295385844] [2021-05-02 17:58:39,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295385844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:39,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17662468] [2021-05-02 17:58:39,590 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 17:58:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:39,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:39,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17662468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:39,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:39,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2021-05-02 17:58:39,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359038077] [2021-05-02 17:58:39,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 17:58:39,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 17:58:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 17:58:39,927 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 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 17:58:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:40,116 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 17:58:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 17:58:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 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 122 [2021-05-02 17:58:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:40,117 INFO L225 Difference]: With dead ends: 126 [2021-05-02 17:58:40,117 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 17:58:40,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1194.4ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 17:58:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 17:58:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 17:58:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 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 17:58:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 17:58:40,123 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 17:58:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:40,123 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 17:58:40,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 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 17:58:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 17:58:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 17:58:40,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:40,124 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:40,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:40,341 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1195959573, now seen corresponding path program 56 times [2021-05-02 17:58:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:40,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541084987] [2021-05-02 17:58:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:41,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541084987] [2021-05-02 17:58:41,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541084987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999544384] [2021-05-02 17:58:41,627 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:41,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:58:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 17:58:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:41,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999544384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:41,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:41,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 17:58:41,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157874518] [2021-05-02 17:58:41,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 17:58:41,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:41,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 17:58:41,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 17:58:41,937 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 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 17:58:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:42,202 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 17:58:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 17:58:42,203 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 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 124 [2021-05-02 17:58:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:42,203 INFO L225 Difference]: With dead ends: 128 [2021-05-02 17:58:42,203 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 17:58:42,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1228.4ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 17:58:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 17:58:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 17:58:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 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 17:58:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 17:58:42,206 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 17:58:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:42,206 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 17:58:42,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 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 17:58:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 17:58:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 17:58:42,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:42,207 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:42,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 17:58:42,429 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -48899315, now seen corresponding path program 57 times [2021-05-02 17:58:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974158000] [2021-05-02 17:58:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:43,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:43,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:43,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974158000] [2021-05-02 17:58:43,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974158000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:43,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026387522] [2021-05-02 17:58:43,759 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:48,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 17:58:48,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 17:58:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:48,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:49,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026387522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:49,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:49,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 17:58:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118730374] [2021-05-02 17:58:49,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 17:58:49,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 17:58:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:58:49,102 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 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 17:58:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:49,333 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 17:58:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 17:58:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 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 126 [2021-05-02 17:58:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:49,334 INFO L225 Difference]: With dead ends: 130 [2021-05-02 17:58:49,334 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 17:58:49,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:58:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 17:58:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 17:58:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 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 17:58:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 17:58:49,336 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 17:58:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:49,336 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 17:58:49,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 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 17:58:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 17:58:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 17:58:49,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:49,337 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:49,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:49,538 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1530586449, now seen corresponding path program 58 times [2021-05-02 17:58:49,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:49,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187345347] [2021-05-02 17:58:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:50,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:50,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:50,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187345347] [2021-05-02 17:58:50,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187345347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:50,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807176316] [2021-05-02 17:58:50,939 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:51,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:58:51,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 17:58:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:51,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807176316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:51,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:51,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2021-05-02 17:58:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963624674] [2021-05-02 17:58:51,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 17:58:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 17:58:51,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 17:58:51,292 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 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 17:58:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:51,520 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 17:58:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 17:58:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 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 128 [2021-05-02 17:58:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:51,521 INFO L225 Difference]: With dead ends: 132 [2021-05-02 17:58:51,521 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 17:58:51,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1324.1ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 17:58:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 17:58:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 17:58:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 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 17:58:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 17:58:51,523 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 17:58:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:51,523 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 17:58:51,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 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 17:58:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 17:58:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 17:58:51,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:51,524 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:51,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 17:58:51,745 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash 497220049, now seen corresponding path program 59 times [2021-05-02 17:58:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:51,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119767653] [2021-05-02 17:58:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:53,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:53,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119767653] [2021-05-02 17:58:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119767653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394582623] [2021-05-02 17:58:53,198 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true