/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/nla-digbench-scaling/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:41,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:41,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:41,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:22:41,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:22:41,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:22:41,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:22:41,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:22:41,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:22:41,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:22:41,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:22:41,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:22:41,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:41,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:41,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:41,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:41,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:41,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:41,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:41,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:41,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:41,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:41,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:41,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:41,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:22:41,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:22:41,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:22:41,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:22:41,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:22:41,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:22:41,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:22:41,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:22:41,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:22:41,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:22:41,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:22:41,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:22:41,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:22:41,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:22:41,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:41,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:41,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:41,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:41,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:41,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:41,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:41,255 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:41,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:41,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:41,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:41,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:41,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:41,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:41,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:41,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:41,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:41,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:41,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:41,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:41,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:41,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:41,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:41,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:41,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:41,259 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:41,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:41,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:41,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:41,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:41,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:41,538 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:41,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-05-06 08:22:41,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a601a86/2eb37bc7c8164a4ca5642ebb3b6140fc/FLAGfb1414fb1 [2021-05-06 08:22:41,910 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:41,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-05-06 08:22:41,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a601a86/2eb37bc7c8164a4ca5642ebb3b6140fc/FLAGfb1414fb1 [2021-05-06 08:22:42,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41a601a86/2eb37bc7c8164a4ca5642ebb3b6140fc [2021-05-06 08:22:42,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:42,374 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:42,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:42,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:42,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:42,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb95446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42, skipping insertion in model container [2021-05-06 08:22:42,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:42,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:42,484 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2021-05-06 08:22:42,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:42,510 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:42,549 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2021-05-06 08:22:42,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:42,578 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:42,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42 WrapperNode [2021-05-06 08:22:42,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:42,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:42,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:42,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:42,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:42,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:42,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:42,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:42,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (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 [2021-05-06 08:22:42,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:42,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:42,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:42,667 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:42,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:42,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:42,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:42,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:42,877 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:42,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:42 BoogieIcfgContainer [2021-05-06 08:22:42,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:42,879 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:42,879 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:42,879 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:42,881 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:42" (1/1) ... [2021-05-06 08:22:42,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:42 BasicIcfg [2021-05-06 08:22:42,891 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:42,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:42,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:42,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:42,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:42" (1/4) ... [2021-05-06 08:22:42,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3967dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:42, skipping insertion in model container [2021-05-06 08:22:42,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:42" (2/4) ... [2021-05-06 08:22:42,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3967dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:42, skipping insertion in model container [2021-05-06 08:22:42,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:42" (3/4) ... [2021-05-06 08:22:42,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3967dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:42, skipping insertion in model container [2021-05-06 08:22:42,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:42" (4/4) ... [2021-05-06 08:22:42,895 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.cJordan [2021-05-06 08:22:42,899 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:42,901 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:42,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:42,923 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:42,924 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:42,924 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:42,924 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:42,924 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:42,924 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:42,924 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:42,924 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:42,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:42,937 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:42,937 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:42,940 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:42,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:42,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572464973] [2021-05-06 08:22:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:43,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:43,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572464973] [2021-05-06 08:22:43,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572464973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:43,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:43,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672898673] [2021-05-06 08:22:43,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:43,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:43,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:43,260 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:43,377 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:22:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:43,383 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:43,383 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:43,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:43,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:43,416 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:43,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:43,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:43,418 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:43,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:43,418 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:43,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615466883] [2021-05-06 08:22:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:43,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:43,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325806664] [2021-05-06 08:22:43,437 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 [2021-05-06 08:22:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:43,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:43,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615466883] [2021-05-06 08:22:43,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:43,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325806664] [2021-05-06 08:22:43,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325806664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:43,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:43,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:43,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590347123] [2021-05-06 08:22:43,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:43,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:43,584 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:43,638 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:43,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 08:22:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:43,639 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:43,639 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:43,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:43,645 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:43,646 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:43,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:43,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:43,647 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:43,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:43,867 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:43,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:43,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562532696] [2021-05-06 08:22:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:43,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:43,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201341571] [2021-05-06 08:22:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:44,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:44,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562532696] [2021-05-06 08:22:44,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:44,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201341571] [2021-05-06 08:22:44,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201341571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:44,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:44,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737546493] [2021-05-06 08:22:44,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:44,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:44,118 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:44,200 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-06 08:22:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 08:22:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:44,201 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:22:44,202 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:22:44,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:22:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:22:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:44,206 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:44,207 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:44,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:44,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:44,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:44,208 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:44,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:44,427 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:44,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:44,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868681975] [2021-05-06 08:22:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:44,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:44,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932002265] [2021-05-06 08:22:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:44,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:44,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868681975] [2021-05-06 08:22:44,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932002265] [2021-05-06 08:22:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932002265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:44,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:44,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221671883] [2021-05-06 08:22:44,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:44,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:44,637 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:44,797 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:44,802 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:44,802 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:44,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:44,822 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:44,823 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:44,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:44,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:44,824 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:45,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:45,025 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:45,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604863425] [2021-05-06 08:22:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:45,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:45,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555769747] [2021-05-06 08:22:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:45,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:45,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604863425] [2021-05-06 08:22:45,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:45,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555769747] [2021-05-06 08:22:45,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555769747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:45,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:45,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:45,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217996431] [2021-05-06 08:22:45,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:45,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:45,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:45,317 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:45,557 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:22:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:45,558 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:45,558 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:45,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:45,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:45,567 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:45,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:45,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:45,571 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:45,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:45,772 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:45,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:45,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388789439] [2021-05-06 08:22:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:45,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:45,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279533456] [2021-05-06 08:22:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:45,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:45,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:46,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:46,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388789439] [2021-05-06 08:22:46,051 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:46,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279533456] [2021-05-06 08:22:46,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279533456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:46,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:46,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:46,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085968655] [2021-05-06 08:22:46,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:46,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:46,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:46,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:46,053 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:46,333 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-06 08:22:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 08:22:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:46,336 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:22:46,336 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 08:22:46,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 08:22:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 08:22:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 08:22:46,345 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 08:22:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:46,345 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 08:22:46,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 08:22:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:46,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,346 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:46,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:46,549 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:46,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:46,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563965510] [2021-05-06 08:22:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:46,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:46,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376418348] [2021-05-06 08:22:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:46,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563965510] [2021-05-06 08:22:46,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376418348] [2021-05-06 08:22:46,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376418348] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:46,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:46,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:46,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673489139] [2021-05-06 08:22:46,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:46,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:46,716 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:46,811 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2021-05-06 08:22:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 08:22:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:46,812 INFO L225 Difference]: With dead ends: 105 [2021-05-06 08:22:46,812 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 08:22:46,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 08:22:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 08:22:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 08:22:46,824 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 08:22:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:46,824 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 08:22:46,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 08:22:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:46,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,825 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:47,033 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-06 08:22:47,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413855398] [2021-05-06 08:22:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853768171] [2021-05-06 08:22:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-05-06 08:22:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:47,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413855398] [2021-05-06 08:22:47,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853768171] [2021-05-06 08:22:47,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853768171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:47,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:47,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:47,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354819481] [2021-05-06 08:22:47,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:47,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:47,211 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,304 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-05-06 08:22:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 08:22:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,306 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:22:47,306 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:22:47,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:22:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 08:22:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 08:22:47,311 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 08:22:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,311 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 08:22:47,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 08:22:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:47,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,312 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:47,517 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-06 08:22:47,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035653911] [2021-05-06 08:22:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530998401] [2021-05-06 08:22:47,530 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 [2021-05-06 08:22:47,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:47,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:47,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035653911] [2021-05-06 08:22:47,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530998401] [2021-05-06 08:22:47,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530998401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:47,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:47,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116213509] [2021-05-06 08:22:47,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:47,636 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,688 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-06 08:22:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 08:22:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,689 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:22:47,689 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:22:47,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:22:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 08:22:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 08:22:47,693 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 08:22:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,693 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 08:22:47,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 08:22:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:47,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,694 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:47,913 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125249464] [2021-05-06 08:22:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960188122] [2021-05-06 08:22:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:48,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:22:48,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125249464] [2021-05-06 08:22:48,059 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960188122] [2021-05-06 08:22:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960188122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:48,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:48,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707374616] [2021-05-06 08:22:48,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:48,060 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:48,111 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-05-06 08:22:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:48,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 08:22:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:48,112 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:22:48,112 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:22:48,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:22:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 08:22:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:22:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 08:22:48,117 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 08:22:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:48,117 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 08:22:48,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 08:22:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:48,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:48,118 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:48,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:48,335 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:48,336 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-06 08:22:48,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:48,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052456844] [2021-05-06 08:22:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:48,343 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:48,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789030356] [2021-05-06 08:22:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:48,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:48,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:48,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:48,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:48,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052456844] [2021-05-06 08:22:48,526 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:48,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789030356] [2021-05-06 08:22:48,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789030356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:48,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:48,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:48,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847142819] [2021-05-06 08:22:48,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:48,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:48,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:48,528 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:48,731 INFO L93 Difference]: Finished difference Result 164 states and 229 transitions. [2021-05-06 08:22:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 08:22:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:48,734 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:22:48,734 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:22:48,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:22:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 08:22:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:22:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 08:22:48,739 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 08:22:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:48,740 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 08:22:48,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 08:22:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:48,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:48,740 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:48,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:48,947 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:48,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:48,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:48,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636079054] [2021-05-06 08:22:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:48,954 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:48,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899951640] [2021-05-06 08:22:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:22:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:49,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:22:49,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:49,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636079054] [2021-05-06 08:22:49,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:49,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899951640] [2021-05-06 08:22:49,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899951640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:49,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:49,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:49,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629666465] [2021-05-06 08:22:49,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:49,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:49,270 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:49,585 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2021-05-06 08:22:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:49,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:49,586 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:22:49,586 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 08:22:49,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 08:22:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 08:22:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:22:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 08:22:49,594 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 08:22:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:49,594 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 08:22:49,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 08:22:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:49,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:49,595 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:49,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:49,812 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-06 08:22:49,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:49,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192122685] [2021-05-06 08:22:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:49,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:49,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104155141] [2021-05-06 08:22:49,820 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 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 [2021-05-06 08:22:49,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:49,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:50,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:50,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192122685] [2021-05-06 08:22:50,014 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:50,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104155141] [2021-05-06 08:22:50,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104155141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:50,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:50,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:50,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586044433] [2021-05-06 08:22:50,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:50,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:50,015 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:50,276 INFO L93 Difference]: Finished difference Result 281 states and 417 transitions. [2021-05-06 08:22:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 08:22:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:50,279 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:22:50,279 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:22:50,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:22:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 08:22:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 08:22:50,288 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 08:22:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:50,289 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 08:22:50,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 08:22:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:50,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:50,289 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:50,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:50,509 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-06 08:22:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:50,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83997305] [2021-05-06 08:22:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:50,515 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:50,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477076176] [2021-05-06 08:22:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-05-06 08:22:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:22:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:50,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:50,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:50,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83997305] [2021-05-06 08:22:50,708 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:50,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477076176] [2021-05-06 08:22:50,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477076176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:50,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:50,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:50,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447142678] [2021-05-06 08:22:50,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:50,709 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:22:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:50,877 INFO L93 Difference]: Finished difference Result 233 states and 328 transitions. [2021-05-06 08:22:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-06 08:22:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:50,879 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:50,879 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:50,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-05-06 08:22:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 130 states have internal predecessors, (147), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2021-05-06 08:22:50,885 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 74 [2021-05-06 08:22:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:50,885 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2021-05-06 08:22:50,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:22:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2021-05-06 08:22:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:50,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:50,886 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:51,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:51,101 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-06 08:22:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:51,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514690209] [2021-05-06 08:22:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:51,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:51,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189522724] [2021-05-06 08:22:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:51,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 08:22:51,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514690209] [2021-05-06 08:22:51,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189522724] [2021-05-06 08:22:51,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189522724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:51,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:51,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:51,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171571146] [2021-05-06 08:22:51,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:51,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:51,275 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:51,347 INFO L93 Difference]: Finished difference Result 233 states and 320 transitions. [2021-05-06 08:22:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 08:22:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:51,349 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:51,349 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:51,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-06 08:22:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 139 states have internal predecessors, (156), 83 states have call successors, (83), 18 states have call predecessors, (83), 17 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 320 transitions. [2021-05-06 08:22:51,355 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 320 transitions. Word has length 72 [2021-05-06 08:22:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:51,355 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 320 transitions. [2021-05-06 08:22:51,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 320 transitions. [2021-05-06 08:22:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:51,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:51,356 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:51,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:51,569 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-06 08:22:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:51,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552318839] [2021-05-06 08:22:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:51,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:51,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075489858] [2021-05-06 08:22:51,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:51,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:51,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:22:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:51,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:22:51,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552318839] [2021-05-06 08:22:51,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075489858] [2021-05-06 08:22:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075489858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:51,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264828197] [2021-05-06 08:22:51,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:51,735 INFO L87 Difference]: Start difference. First operand 233 states and 320 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:51,767 INFO L93 Difference]: Finished difference Result 232 states and 304 transitions. [2021-05-06 08:22:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-06 08:22:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:51,768 INFO L225 Difference]: With dead ends: 232 [2021-05-06 08:22:51,768 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 08:22:51,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 08:22:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 216. [2021-05-06 08:22:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 130 states have internal predecessors, (148), 71 states have call successors, (71), 18 states have call predecessors, (71), 17 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-05-06 08:22:51,777 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 77 [2021-05-06 08:22:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:51,777 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-05-06 08:22:51,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-05-06 08:22:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:51,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:51,778 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:51,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:51,985 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-06 08:22:51,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:51,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687393821] [2021-05-06 08:22:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:51,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:51,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663849379] [2021-05-06 08:22:51,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:52,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:22:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:52,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:52,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687393821] [2021-05-06 08:22:52,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663849379] [2021-05-06 08:22:52,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663849379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:52,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:52,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:52,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281799007] [2021-05-06 08:22:52,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:52,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:52,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:52,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:52,146 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:52,182 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2021-05-06 08:22:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:52,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 08:22:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:52,183 INFO L225 Difference]: With dead ends: 236 [2021-05-06 08:22:52,183 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 08:22:52,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 08:22:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-05-06 08:22:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 134 states have (on average 1.171641791044776) internal successors, (157), 137 states have internal predecessors, (157), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 08:22:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-05-06 08:22:52,190 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 77 [2021-05-06 08:22:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:52,190 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-05-06 08:22:52,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-05-06 08:22:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:22:52,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:52,191 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:52,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:52,405 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-06 08:22:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501700959] [2021-05-06 08:22:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:52,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:52,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047717974] [2021-05-06 08:22:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:22:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:52,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:52,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:52,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501700959] [2021-05-06 08:22:52,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047717974] [2021-05-06 08:22:52,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047717974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:52,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:52,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:52,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110102035] [2021-05-06 08:22:52,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:52,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:52,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:52,653 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:52,909 INFO L93 Difference]: Finished difference Result 309 states and 421 transitions. [2021-05-06 08:22:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 08:22:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:52,911 INFO L225 Difference]: With dead ends: 309 [2021-05-06 08:22:52,911 INFO L226 Difference]: Without dead ends: 309 [2021-05-06 08:22:52,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-06 08:22:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 250. [2021-05-06 08:22:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 147 states have internal predecessors, (165), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-05-06 08:22:52,918 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 79 [2021-05-06 08:22:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:52,918 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-05-06 08:22:52,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-05-06 08:22:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:52,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:52,919 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:53,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:53,137 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:53,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-06 08:22:53,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:53,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069392856] [2021-05-06 08:22:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:53,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:53,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595498298] [2021-05-06 08:22:53,163 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 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 [2021-05-06 08:22:53,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 08:22:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:53,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:22:53,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069392856] [2021-05-06 08:22:53,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:53,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595498298] [2021-05-06 08:22:53,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595498298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:53,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:53,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:53,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300925686] [2021-05-06 08:22:53,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:53,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:53,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:53,510 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:53,906 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2021-05-06 08:22:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:53,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-05-06 08:22:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:53,908 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:22:53,908 INFO L226 Difference]: Without dead ends: 315 [2021-05-06 08:22:53,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-06 08:22:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 297. [2021-05-06 08:22:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 175 states have internal predecessors, (198), 103 states have call successors, (103), 24 states have call predecessors, (103), 23 states have return successors, (101), 97 states have call predecessors, (101), 101 states have call successors, (101) [2021-05-06 08:22:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 402 transitions. [2021-05-06 08:22:53,917 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 402 transitions. Word has length 77 [2021-05-06 08:22:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:53,917 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 402 transitions. [2021-05-06 08:22:53,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 402 transitions. [2021-05-06 08:22:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:22:53,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:53,921 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:54,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:54,137 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2021-05-06 08:22:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396801909] [2021-05-06 08:22:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:54,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:54,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885186617] [2021-05-06 08:22:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-05-06 08:22:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:54,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:22:54,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:54,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-06 08:22:54,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396801909] [2021-05-06 08:22:54,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885186617] [2021-05-06 08:22:54,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885186617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:54,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:54,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886583430] [2021-05-06 08:22:54,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:54,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:54,556 INFO L87 Difference]: Start difference. First operand 297 states and 402 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:55,198 INFO L93 Difference]: Finished difference Result 378 states and 518 transitions. [2021-05-06 08:22:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:55,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 08:22:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:55,202 INFO L225 Difference]: With dead ends: 378 [2021-05-06 08:22:55,202 INFO L226 Difference]: Without dead ends: 377 [2021-05-06 08:22:55,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-06 08:22:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 362. [2021-05-06 08:22:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 204 states have (on average 1.1813725490196079) internal successors, (241), 209 states have internal predecessors, (241), 131 states have call successors, (131), 27 states have call predecessors, (131), 26 states have return successors, (129), 125 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-06 08:22:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 501 transitions. [2021-05-06 08:22:55,212 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 501 transitions. Word has length 86 [2021-05-06 08:22:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:55,212 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 501 transitions. [2021-05-06 08:22:55,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 501 transitions. [2021-05-06 08:22:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:55,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:55,213 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:55,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,421 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 2 times [2021-05-06 08:22:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027593276] [2021-05-06 08:22:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:55,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:55,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558901021] [2021-05-06 08:22:55,427 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 [2021-05-06 08:22:55,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:55,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:22:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:55,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:55,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:55,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027593276] [2021-05-06 08:22:55,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:55,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558901021] [2021-05-06 08:22:55,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558901021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:55,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:55,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:55,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097907514] [2021-05-06 08:22:55,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:55,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:55,861 INFO L87 Difference]: Start difference. First operand 362 states and 501 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:56,510 INFO L93 Difference]: Finished difference Result 452 states and 625 transitions. [2021-05-06 08:22:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 08:22:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:56,513 INFO L225 Difference]: With dead ends: 452 [2021-05-06 08:22:56,513 INFO L226 Difference]: Without dead ends: 451 [2021-05-06 08:22:56,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-06 08:22:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 431. [2021-05-06 08:22:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 241 states have (on average 1.1908713692946058) internal successors, (287), 246 states have internal predecessors, (287), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 153 states have call predecessors, (157), 157 states have call successors, (157) [2021-05-06 08:22:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 603 transitions. [2021-05-06 08:22:56,524 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 603 transitions. Word has length 91 [2021-05-06 08:22:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:56,524 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 603 transitions. [2021-05-06 08:22:56,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 603 transitions. [2021-05-06 08:22:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 08:22:56,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:56,525 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:56,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:22:56,733 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:56,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1005767165, now seen corresponding path program 2 times [2021-05-06 08:22:56,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:56,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774146210] [2021-05-06 08:22:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:56,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:56,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557392261] [2021-05-06 08:22:56,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:56,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:56,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 08:22:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,218 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-06 08:22:57,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-05-06 08:22:57,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:57,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774146210] [2021-05-06 08:22:57,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:57,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557392261] [2021-05-06 08:22:57,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557392261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:57,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:57,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:57,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415716478] [2021-05-06 08:22:57,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:57,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:57,456 INFO L87 Difference]: Start difference. First operand 431 states and 603 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:58,089 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 08:22:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:58,401 INFO L93 Difference]: Finished difference Result 468 states and 658 transitions. [2021-05-06 08:22:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 96 [2021-05-06 08:22:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:58,403 INFO L225 Difference]: With dead ends: 468 [2021-05-06 08:22:58,403 INFO L226 Difference]: Without dead ends: 468 [2021-05-06 08:22:58,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:22:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-06 08:22:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 452. [2021-05-06 08:22:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 249 states have (on average 1.1927710843373494) internal successors, (297), 255 states have internal predecessors, (297), 171 states have call successors, (171), 32 states have call predecessors, (171), 31 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2021-05-06 08:22:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 637 transitions. [2021-05-06 08:22:58,415 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 637 transitions. Word has length 96 [2021-05-06 08:22:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:58,415 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 637 transitions. [2021-05-06 08:22:58,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 637 transitions. [2021-05-06 08:22:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:22:58,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:58,416 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:58,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:22:58,617 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 561452732, now seen corresponding path program 2 times [2021-05-06 08:22:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:58,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663321817] [2021-05-06 08:22:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:58,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:58,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706594335] [2021-05-06 08:22:58,623 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 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 [2021-05-06 08:22:58,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:58,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:58,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 08:22:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:58,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-05-06 08:22:58,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663321817] [2021-05-06 08:22:58,831 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706594335] [2021-05-06 08:22:58,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706594335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:58,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:58,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:58,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354546886] [2021-05-06 08:22:58,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:58,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:58,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:58,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:58,833 INFO L87 Difference]: Start difference. First operand 452 states and 637 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:59,057 INFO L93 Difference]: Finished difference Result 644 states and 962 transitions. [2021-05-06 08:22:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2021-05-06 08:22:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:59,059 INFO L225 Difference]: With dead ends: 644 [2021-05-06 08:22:59,060 INFO L226 Difference]: Without dead ends: 644 [2021-05-06 08:22:59,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-05-06 08:22:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 583. [2021-05-06 08:22:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 287 states have (on average 1.2090592334494774) internal successors, (347), 304 states have internal predecessors, (347), 263 states have call successors, (263), 33 states have call predecessors, (263), 32 states have return successors, (261), 245 states have call predecessors, (261), 261 states have call successors, (261) [2021-05-06 08:22:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 871 transitions. [2021-05-06 08:22:59,075 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 871 transitions. Word has length 101 [2021-05-06 08:22:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:59,075 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 871 transitions. [2021-05-06 08:22:59,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 871 transitions. [2021-05-06 08:22:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:22:59,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:59,076 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:59,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:59,293 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:59,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 5 times [2021-05-06 08:22:59,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:59,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783564341] [2021-05-06 08:22:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:59,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:59,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001649518] [2021-05-06 08:22:59,299 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 [2021-05-06 08:22:59,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:22:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:22:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:59,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 08:22:59,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:59,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783564341] [2021-05-06 08:22:59,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:59,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001649518] [2021-05-06 08:22:59,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001649518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:59,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:59,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:59,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131610555] [2021-05-06 08:22:59,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:22:59,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:59,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:22:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:59,953 INFO L87 Difference]: Start difference. First operand 583 states and 871 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:00,880 INFO L93 Difference]: Finished difference Result 674 states and 997 transitions. [2021-05-06 08:23:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 08:23:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:00,888 INFO L225 Difference]: With dead ends: 674 [2021-05-06 08:23:00,888 INFO L226 Difference]: Without dead ends: 674 [2021-05-06 08:23:00,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:23:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-05-06 08:23:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 591. [2021-05-06 08:23:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 293 states have (on average 1.204778156996587) internal successors, (353), 310 states have internal predecessors, (353), 263 states have call successors, (263), 35 states have call predecessors, (263), 34 states have return successors, (261), 245 states have call predecessors, (261), 261 states have call successors, (261) [2021-05-06 08:23:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 877 transitions. [2021-05-06 08:23:00,902 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 877 transitions. Word has length 102 [2021-05-06 08:23:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:00,902 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 877 transitions. [2021-05-06 08:23:00,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 877 transitions. [2021-05-06 08:23:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:23:00,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:00,904 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:01,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:23:01,113 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1716502634, now seen corresponding path program 3 times [2021-05-06 08:23:01,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:01,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193022700] [2021-05-06 08:23:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:01,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:01,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228190981] [2021-05-06 08:23:01,118 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 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 [2021-05-06 08:23:01,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:23:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:23:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:01,627 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 08:23:01,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 68 proven. 5 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-05-06 08:23:01,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:01,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193022700] [2021-05-06 08:23:01,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:01,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228190981] [2021-05-06 08:23:01,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228190981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:01,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:01,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:23:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197138822] [2021-05-06 08:23:01,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:23:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:23:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:01,780 INFO L87 Difference]: Start difference. First operand 591 states and 877 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:23:02,360 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 08:23:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:03,332 INFO L93 Difference]: Finished difference Result 698 states and 1041 transitions. [2021-05-06 08:23:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 108 [2021-05-06 08:23:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:03,335 INFO L225 Difference]: With dead ends: 698 [2021-05-06 08:23:03,335 INFO L226 Difference]: Without dead ends: 697 [2021-05-06 08:23:03,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:23:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-05-06 08:23:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 683. [2021-05-06 08:23:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 334 states have (on average 1.2125748502994012) internal successors, (405), 354 states have internal predecessors, (405), 311 states have call successors, (311), 38 states have call predecessors, (311), 37 states have return successors, (309), 290 states have call predecessors, (309), 309 states have call successors, (309) [2021-05-06 08:23:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1025 transitions. [2021-05-06 08:23:03,350 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1025 transitions. Word has length 108 [2021-05-06 08:23:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:03,350 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 1025 transitions. [2021-05-06 08:23:03,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:23:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1025 transitions. [2021-05-06 08:23:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:23:03,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:03,352 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:03,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:03,557 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1501596464, now seen corresponding path program 6 times [2021-05-06 08:23:03,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:03,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28524856] [2021-05-06 08:23:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:03,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:03,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047699905] [2021-05-06 08:23:03,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:03,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:23:03,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:23:03,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:23:03,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:03,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28524856] [2021-05-06 08:23:03,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:03,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047699905] [2021-05-06 08:23:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047699905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:03,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676908758] [2021-05-06 08:23:03,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:03,838 INFO L87 Difference]: Start difference. First operand 683 states and 1025 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:04,450 INFO L93 Difference]: Finished difference Result 703 states and 1045 transitions. [2021-05-06 08:23:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:04,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 107 [2021-05-06 08:23:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:04,456 INFO L225 Difference]: With dead ends: 703 [2021-05-06 08:23:04,456 INFO L226 Difference]: Without dead ends: 703 [2021-05-06 08:23:04,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:23:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-05-06 08:23:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 696. [2021-05-06 08:23:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 343 states have (on average 1.206997084548105) internal successors, (414), 364 states have internal predecessors, (414), 313 states have call successors, (313), 40 states have call predecessors, (313), 39 states have return successors, (311), 291 states have call predecessors, (311), 311 states have call successors, (311) [2021-05-06 08:23:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1038 transitions. [2021-05-06 08:23:04,473 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1038 transitions. Word has length 107 [2021-05-06 08:23:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:04,473 INFO L480 AbstractCegarLoop]: Abstraction has 696 states and 1038 transitions. [2021-05-06 08:23:04,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:23:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1038 transitions. [2021-05-06 08:23:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:23:04,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:04,475 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:04,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:23:04,689 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 4 times [2021-05-06 08:23:04,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:04,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411477326] [2021-05-06 08:23:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:04,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:04,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9256127] [2021-05-06 08:23:04,697 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 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 [2021-05-06 08:23:04,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:04,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 08:23:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:04,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:04,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,418 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:23:05,637 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:23:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:05,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 95 proven. 61 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-05-06 08:23:06,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:06,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411477326] [2021-05-06 08:23:06,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:06,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9256127] [2021-05-06 08:23:06,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9256127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:06,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:06,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:23:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085511366] [2021-05-06 08:23:06,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:23:06,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:06,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:23:06,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:23:06,114 INFO L87 Difference]: Start difference. First operand 696 states and 1038 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:23:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:06,972 INFO L93 Difference]: Finished difference Result 754 states and 1121 transitions. [2021-05-06 08:23:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:23:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2021-05-06 08:23:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:06,973 INFO L225 Difference]: With dead ends: 754 [2021-05-06 08:23:06,973 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:23:06,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1226.9ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:23:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:23:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:23:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:23:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:23:06,974 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2021-05-06 08:23:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:06,974 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:23:06,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:23:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:23:06,974 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:23:07,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:23:07,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:07 BasicIcfg [2021-05-06 08:23:07,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:23:07,193 INFO L168 Benchmark]: Toolchain (without parser) took 24819.08 ms. Allocated memory was 187.7 MB in the beginning and 390.1 MB in the end (delta: 202.4 MB). Free memory was 152.1 MB in the beginning and 220.5 MB in the end (delta: -68.3 MB). Peak memory consumption was 136.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:07,193 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:23:07,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.02 ms. Allocated memory is still 187.7 MB. Free memory was 151.9 MB in the beginning and 170.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:07,194 INFO L168 Benchmark]: Boogie Preprocessor took 19.20 ms. Allocated memory is still 187.7 MB. Free memory was 170.0 MB in the beginning and 168.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:07,194 INFO L168 Benchmark]: RCFGBuilder took 278.99 ms. Allocated memory is still 187.7 MB. Free memory was 168.2 MB in the beginning and 151.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:07,194 INFO L168 Benchmark]: IcfgTransformer took 11.83 ms. Allocated memory is still 187.7 MB. Free memory was 151.1 MB in the beginning and 149.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:07,194 INFO L168 Benchmark]: TraceAbstraction took 24301.52 ms. Allocated memory was 187.7 MB in the beginning and 390.1 MB in the end (delta: 202.4 MB). Free memory was 149.5 MB in the beginning and 220.5 MB in the end (delta: -71.0 MB). Peak memory consumption was 132.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:07,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 201.02 ms. Allocated memory is still 187.7 MB. Free memory was 151.9 MB in the beginning and 170.0 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.20 ms. Allocated memory is still 187.7 MB. Free memory was 170.0 MB in the beginning and 168.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.99 ms. Allocated memory is still 187.7 MB. Free memory was 168.2 MB in the beginning and 151.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.83 ms. Allocated memory is still 187.7 MB. Free memory was 151.1 MB in the beginning and 149.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24301.52 ms. Allocated memory was 187.7 MB in the beginning and 390.1 MB in the end (delta: 202.4 MB). Free memory was 149.5 MB in the beginning and 220.5 MB in the end (delta: -71.0 MB). Peak memory consumption was 132.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24267.8ms, OverallIterations: 27, TraceHistogramMax: 13, EmptinessCheckTime: 31.0ms, AutomataDifference: 9474.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1320 SDtfs, 1225 SDslu, 6931 SDs, 0 SdLazy, 7680 SolverSat, 1041 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5938.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1966 GetRequests, 1592 SyntacticMatches, 9 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 5777.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=696occurred in iteration=26, InterpolantAutomatonStates: 297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 233.1ms AutomataMinimizationTime, 27 MinimizatonAttempts, 581 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 219.7ms SsaConstructionTime, 754.8ms SatisfiabilityAnalysisTime, 6971.6ms InterpolantComputationTime, 1863 NumberOfCodeBlocks, 1729 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1836 ConstructedInterpolants, 0 QuantifiedInterpolants, 10193 SizeOfPredicates, 168 NumberOfNonLiveVariables, 5535 ConjunctsInSsa, 809 ConjunctsInUnsatCore, 27 InterpolantComputations, 7 PerfectInterpolantSequences, 2776/3149 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...