/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:30:50,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:30:50,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:30:51,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 02:30:51,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 02:30:51,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 02:30:51,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 02:30:51,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 02:30:51,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 02:30:51,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 02:30:51,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 02:30:51,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 02:30:51,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:30:51,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:30:51,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:30:51,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:30:51,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:30:51,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:30:51,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:30:51,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:30:51,122 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:30:51,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:30:51,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:30:51,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:30:51,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:30:51,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-05 02:30:51,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-05 02:30:51,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-05 02:30:51,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-05 02:30:51,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-05 02:30:51,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-05 02:30:51,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-05 02:30:51,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-05 02:30:51,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-05 02:30:51,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-05 02:30:51,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-05 02:30:51,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-05 02:30:51,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-05 02:30:51,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-05 02:30:51,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:30:51,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:30:51,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:30:51,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:30:51,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:30:51,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:30:51,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:30:51,150 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:30:51,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:30:51,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:30:51,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:30:51,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:30:51,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:30:51,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:30:51,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:30:51,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:30:51,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:30:51,153 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:30:51,153 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:30:51,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:30:51,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:30:51,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:30:51,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:30:51,519 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:30:51,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-04-05 02:30:51,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f4ce6f6a/28e4c481d48a4ad5b064a052f3065408/FLAG01a7cc4d7 [2022-04-05 02:30:51,889 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:30:51,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-04-05 02:30:51,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f4ce6f6a/28e4c481d48a4ad5b064a052f3065408/FLAG01a7cc4d7 [2022-04-05 02:30:51,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f4ce6f6a/28e4c481d48a4ad5b064a052f3065408 [2022-04-05 02:30:51,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:30:51,908 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:30:51,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:30:51,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:30:51,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:30:51,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:30:51" (1/1) ... [2022-04-05 02:30:51,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad163ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:51, skipping insertion in model container [2022-04-05 02:30:51,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:30:51" (1/1) ... [2022-04-05 02:30:51,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:30:51,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:30:52,062 WARN L230 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_unwindbound20.c[490,503] [2022-04-05 02:30:52,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:30:52,122 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:30:52,130 WARN L230 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_unwindbound20.c[490,503] [2022-04-05 02:30:52,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:30:52,172 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:30:52,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52 WrapperNode [2022-04-05 02:30:52,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:30:52,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:30:52,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:30:52,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:30:52,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:30:52,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:30:52,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:30:52,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:30:52,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:30:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:52,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 02:30:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 02:30:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:30:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:30:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:30:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:30:52,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:30:52,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:30:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:30:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:30:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:30:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:30:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 02:30:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:30:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:30:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:30:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:30:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:30:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:30:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:30:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:30:52,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:30:52,320 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:30:52,321 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:30:52,481 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:30:52,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:30:52,485 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 02:30:52,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:30:52 BoogieIcfgContainer [2022-04-05 02:30:52,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:30:52,486 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:30:52,486 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:30:52,487 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:30:52,489 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:30:52" (1/1) ... [2022-04-05 02:30:52,490 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:30:52,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:30:52 BasicIcfg [2022-04-05 02:30:52,508 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:30:52,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:30:52,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:30:52,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:30:52,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:30:51" (1/4) ... [2022-04-05 02:30:52,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6288dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:30:52, skipping insertion in model container [2022-04-05 02:30:52,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:30:52" (2/4) ... [2022-04-05 02:30:52,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6288dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:30:52, skipping insertion in model container [2022-04-05 02:30:52,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:30:52" (3/4) ... [2022-04-05 02:30:52,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6288dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:30:52, skipping insertion in model container [2022-04-05 02:30:52,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:30:52" (4/4) ... [2022-04-05 02:30:52,513 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.cJordan [2022-04-05 02:30:52,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:30:52,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:30:52,561 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:30:52,568 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 02:30:52,568 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:30:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:30:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 02:30:52,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:52,598 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:30:52,598 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-04-05 02:30:52,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922098152] [2022-04-05 02:30:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 02:30:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:52,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 02:30:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:52,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 02:30:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:52,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:52,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922098152] [2022-04-05 02:30:52,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922098152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:52,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:52,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:30:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534394249] [2022-04-05 02:30:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:52,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:30:52,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:30:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:30:52,811 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:52,885 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-04-05 02:30:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:30:52,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 02:30:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:52,892 INFO L225 Difference]: With dead ends: 41 [2022-04-05 02:30:52,892 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 02:30:52,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:30:52,898 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:52,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:30:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 02:30:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-05 02:30:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 02:30:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-05 02:30:52,929 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-05 02:30:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:52,929 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-05 02:30:52,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-05 02:30:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 02:30:52,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:52,932 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:30:52,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 02:30:52,933 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-04-05 02:30:52,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773344082] [2022-04-05 02:30:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:52,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:52,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792376287] [2022-04-05 02:30:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:52,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:52,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:52,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:52,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 02:30:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:53,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:30:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:53,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:53,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773344082] [2022-04-05 02:30:53,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792376287] [2022-04-05 02:30:53,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792376287] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:53,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:53,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 02:30:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036517457] [2022-04-05 02:30:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:53,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 02:30:53,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 02:30:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:30:53,088 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:53,102 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-04-05 02:30:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 02:30:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 02:30:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:53,103 INFO L225 Difference]: With dead ends: 37 [2022-04-05 02:30:53,103 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 02:30:53,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:30:53,104 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:53,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:30:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 02:30:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 02:30:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 02:30:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-05 02:30:53,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-05 02:30:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:53,110 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-05 02:30:53,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-05 02:30:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 02:30:53,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:53,124 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:30:53,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:53,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:53,339 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-04-05 02:30:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:53,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586665107] [2022-04-05 02:30:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:53,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487301252] [2022-04-05 02:30:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:53,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:53,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:53,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 02:30:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:53,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:30:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:30:53,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:53,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586665107] [2022-04-05 02:30:53,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487301252] [2022-04-05 02:30:53,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487301252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:53,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:53,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:30:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337159619] [2022-04-05 02:30:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:53,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:30:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:30:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:30:53,463 INFO L87 Difference]: Start difference. First operand 37 states and 47 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:30:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:53,517 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-04-05 02:30:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:30:53,518 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-05 02:30:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:53,518 INFO L225 Difference]: With dead ends: 50 [2022-04-05 02:30:53,518 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 02:30:53,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:30:53,520 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:53,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 148 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:30:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 02:30:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-04-05 02:30:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 02:30:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-04-05 02:30:53,525 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-04-05 02:30:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:53,525 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-04-05 02:30:53,525 INFO L479 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:30:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-04-05 02:30:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 02:30:53,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:53,526 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:53,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:53,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 02:30:53,740 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-04-05 02:30:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:53,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13866021] [2022-04-05 02:30:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:53,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:53,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702447348] [2022-04-05 02:30:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:53,759 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:53,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:30:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:30:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:53,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:53,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:53,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13866021] [2022-04-05 02:30:53,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:53,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702447348] [2022-04-05 02:30:53,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702447348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:53,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:53,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:30:53,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774057589] [2022-04-05 02:30:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:53,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:30:53,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:53,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:30:53,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:30:53,863 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:53,880 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-04-05 02:30:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:30:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-05 02:30:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:53,881 INFO L225 Difference]: With dead ends: 40 [2022-04-05 02:30:53,881 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 02:30:53,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:30:53,882 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:53,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:30:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 02:30:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-05 02:30:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 02:30:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-04-05 02:30:53,887 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-04-05 02:30:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:53,887 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-04-05 02:30:53,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-04-05 02:30:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 02:30:53,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:53,888 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:53,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:54,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:54,103 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:54,105 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-04-05 02:30:54,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:54,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170399530] [2022-04-05 02:30:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:54,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:54,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:54,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611627241] [2022-04-05 02:30:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:54,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:54,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:54,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:30:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 02:30:54,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:30:54,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:54,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:54,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170399530] [2022-04-05 02:30:54,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:54,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611627241] [2022-04-05 02:30:54,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611627241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:54,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:54,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-05 02:30:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125451278] [2022-04-05 02:30:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:54,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:30:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:30:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:30:54,605 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:30:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:54,831 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-04-05 02:30:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 02:30:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-05 02:30:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:54,835 INFO L225 Difference]: With dead ends: 66 [2022-04-05 02:30:54,835 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 02:30:54,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:30:54,839 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:54,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 248 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:30:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 02:30:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-04-05 02:30:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 02:30:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-05 02:30:54,852 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-05 02:30:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:54,852 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-05 02:30:54,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:30:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-05 02:30:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 02:30:54,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:54,853 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:54,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:55,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:55,072 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-04-05 02:30:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:55,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086384083] [2022-04-05 02:30:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:55,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:55,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010027275] [2022-04-05 02:30:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:55,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:55,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:55,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 02:30:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:30:55,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:55,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:30:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:55,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:55,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086384083] [2022-04-05 02:30:55,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:55,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010027275] [2022-04-05 02:30:55,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010027275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:30:55,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:30:55,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 02:30:55,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461852289] [2022-04-05 02:30:55,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:30:55,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:30:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:55,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:30:55,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:30:55,527 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:30:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:55,649 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-04-05 02:30:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 02:30:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-04-05 02:30:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:55,654 INFO L225 Difference]: With dead ends: 144 [2022-04-05 02:30:55,654 INFO L226 Difference]: Without dead ends: 144 [2022-04-05 02:30:55,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-04-05 02:30:55,656 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:55,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 286 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:30:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-05 02:30:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-04-05 02:30:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 02:30:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-04-05 02:30:55,696 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-04-05 02:30:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:55,696 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-04-05 02:30:55,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:30:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-04-05 02:30:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 02:30:55,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:55,697 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:55,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:55,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:55,907 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-04-05 02:30:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731338024] [2022-04-05 02:30:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:55,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271100933] [2022-04-05 02:30:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:55,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:55,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 02:30:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:30:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:30:56,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:30:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:30:56,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:56,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731338024] [2022-04-05 02:30:56,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:56,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271100933] [2022-04-05 02:30:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271100933] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:30:56,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:30:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 02:30:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971064752] [2022-04-05 02:30:56,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:30:56,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:30:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:30:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 02:30:56,179 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:56,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:56,326 INFO L93 Difference]: Finished difference Result 175 states and 251 transitions. [2022-04-05 02:30:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 02:30:56,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-05 02:30:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:56,328 INFO L225 Difference]: With dead ends: 175 [2022-04-05 02:30:56,328 INFO L226 Difference]: Without dead ends: 175 [2022-04-05 02:30:56,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:30:56,329 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:56,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 254 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:30:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-05 02:30:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-04-05 02:30:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 02:30:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-04-05 02:30:56,335 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-04-05 02:30:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:56,336 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-04-05 02:30:56,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-04-05 02:30:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 02:30:56,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:56,337 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:56,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:56,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:56,553 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-04-05 02:30:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60278036] [2022-04-05 02:30:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:56,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:56,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753330384] [2022-04-05 02:30:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:56,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:56,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:56,564 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:56,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 02:30:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 02:30:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:30:56,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60278036] [2022-04-05 02:30:56,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753330384] [2022-04-05 02:30:56,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753330384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:56,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:56,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-05 02:30:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487475647] [2022-04-05 02:30:56,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:56,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:30:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:56,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:30:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:30:56,795 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 02:30:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:56,934 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-04-05 02:30:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 02:30:56,934 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-04-05 02:30:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:56,935 INFO L225 Difference]: With dead ends: 155 [2022-04-05 02:30:56,935 INFO L226 Difference]: Without dead ends: 155 [2022-04-05 02:30:56,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-05 02:30:56,936 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:56,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 228 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:30:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-05 02:30:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-04-05 02:30:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 02:30:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-04-05 02:30:56,941 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-04-05 02:30:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:56,941 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-04-05 02:30:56,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 02:30:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-04-05 02:30:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 02:30:56,942 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:56,942 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:56,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:57,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:57,164 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-04-05 02:30:57,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:57,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79356477] [2022-04-05 02:30:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:57,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:57,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:57,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281057663] [2022-04-05 02:30:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:57,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 02:30:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 02:30:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 02:30:57,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:30:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:57,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:57,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79356477] [2022-04-05 02:30:57,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:57,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281057663] [2022-04-05 02:30:57,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281057663] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:30:57,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:30:57,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-05 02:30:57,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671329940] [2022-04-05 02:30:57,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:30:57,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 02:30:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 02:30:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:30:57,801 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 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) [2022-04-05 02:30:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:57,985 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2022-04-05 02:30:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:30:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 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 36 [2022-04-05 02:30:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:57,986 INFO L225 Difference]: With dead ends: 177 [2022-04-05 02:30:57,987 INFO L226 Difference]: Without dead ends: 177 [2022-04-05 02:30:57,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:30:57,987 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 61 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:57,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 357 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:30:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-05 02:30:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-04-05 02:30:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 02:30:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-04-05 02:30:57,993 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-04-05 02:30:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:57,993 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-04-05 02:30:57,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 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) [2022-04-05 02:30:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-04-05 02:30:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 02:30:57,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:57,994 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:58,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:58,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 02:30:58,208 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:58,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-04-05 02:30:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:58,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808378363] [2022-04-05 02:30:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:58,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:58,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222722202] [2022-04-05 02:30:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:58,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:58,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:58,221 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:58,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 02:30:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:30:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:58,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:58,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808378363] [2022-04-05 02:30:58,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:58,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222722202] [2022-04-05 02:30:58,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222722202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:58,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:58,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:30:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132649194] [2022-04-05 02:30:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:58,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:30:58,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:30:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:30:58,327 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:58,342 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-04-05 02:30:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:30:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-05 02:30:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:58,343 INFO L225 Difference]: With dead ends: 174 [2022-04-05 02:30:58,344 INFO L226 Difference]: Without dead ends: 174 [2022-04-05 02:30:58,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:30:58,344 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:58,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:30:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-05 02:30:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-05 02:30:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 02:30:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-04-05 02:30:58,349 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-04-05 02:30:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:58,349 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-04-05 02:30:58,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:30:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-04-05 02:30:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 02:30:58,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:58,350 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:58,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:58,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 02:30:58,567 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-04-05 02:30:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944717692] [2022-04-05 02:30:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:58,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:58,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562529697] [2022-04-05 02:30:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:58,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:58,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:58,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 02:30:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:30:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 02:30:58,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:30:58,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:58,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944717692] [2022-04-05 02:30:58,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:58,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562529697] [2022-04-05 02:30:58,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562529697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:30:58,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:30:58,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:30:58,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518168303] [2022-04-05 02:30:58,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:30:58,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:30:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:30:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:30:58,683 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:30:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:58,714 INFO L93 Difference]: Finished difference Result 237 states and 331 transitions. [2022-04-05 02:30:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:30:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 02:30:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:30:58,716 INFO L225 Difference]: With dead ends: 237 [2022-04-05 02:30:58,716 INFO L226 Difference]: Without dead ends: 237 [2022-04-05 02:30:58,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:30:58,717 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:30:58,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:30:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-05 02:30:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-04-05 02:30:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-05 02:30:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-04-05 02:30:58,723 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-04-05 02:30:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:30:58,724 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-04-05 02:30:58,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:30:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-04-05 02:30:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 02:30:58,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:30:58,725 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:30:58,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 02:30:58,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 02:30:58,941 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:30:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:30:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-04-05 02:30:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:30:58,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397144879] [2022-04-05 02:30:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:30:58,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:30:58,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544531379] [2022-04-05 02:30:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:30:58,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:30:58,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:30:58,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:30:58,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 02:30:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:30:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 02:30:59,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:30:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:59,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:30:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:30:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:30:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397144879] [2022-04-05 02:30:59,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:30:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544531379] [2022-04-05 02:30:59,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544531379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:30:59,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:30:59,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 02:30:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594886191] [2022-04-05 02:30:59,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:30:59,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:30:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:30:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:30:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:30:59,292 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 02:30:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:30:59,997 INFO L93 Difference]: Finished difference Result 390 states and 576 transitions. [2022-04-05 02:30:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 02:30:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-05 02:30:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:00,001 INFO L225 Difference]: With dead ends: 390 [2022-04-05 02:31:00,001 INFO L226 Difference]: Without dead ends: 390 [2022-04-05 02:31:00,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-05 02:31:00,010 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:00,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 366 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 02:31:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-05 02:31:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-04-05 02:31:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-05 02:31:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-04-05 02:31:00,040 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-04-05 02:31:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:00,040 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-04-05 02:31:00,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 02:31:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-04-05 02:31:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 02:31:00,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:00,041 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 02:31:00,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:00,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 02:31:00,266 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-04-05 02:31:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:00,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605948318] [2022-04-05 02:31:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:00,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:00,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972210328] [2022-04-05 02:31:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:00,299 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:00,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 02:31:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:31:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 02:31:00,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:31:00,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605948318] [2022-04-05 02:31:00,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972210328] [2022-04-05 02:31:00,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972210328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:31:00,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:31:00,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:31:00,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235472031] [2022-04-05 02:31:00,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:00,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:31:00,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:31:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:31:00,478 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-04-05 02:31:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:00,523 INFO L93 Difference]: Finished difference Result 564 states and 884 transitions. [2022-04-05 02:31:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:31:00,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2022-04-05 02:31:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:00,525 INFO L225 Difference]: With dead ends: 564 [2022-04-05 02:31:00,525 INFO L226 Difference]: Without dead ends: 564 [2022-04-05 02:31:00,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:31:00,526 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:00,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:31:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-04-05 02:31:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-04-05 02:31:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-05 02:31:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-04-05 02:31:00,564 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-04-05 02:31:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:00,565 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-04-05 02:31:00,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-04-05 02:31:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-04-05 02:31:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:31:00,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:00,566 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-05 02:31:00,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:00,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 02:31:00,782 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-04-05 02:31:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:00,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746194026] [2022-04-05 02:31:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:00,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:00,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172511023] [2022-04-05 02:31:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:00,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:00,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:00,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:00,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 02:31:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 02:31:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 02:31:01,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 02:31:01,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:01,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746194026] [2022-04-05 02:31:01,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:01,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172511023] [2022-04-05 02:31:01,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172511023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:01,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:01,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-05 02:31:01,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123460429] [2022-04-05 02:31:01,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:01,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 02:31:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 02:31:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:31:01,139 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:31:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:01,279 INFO L93 Difference]: Finished difference Result 770 states and 1118 transitions. [2022-04-05 02:31:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 02:31:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-05 02:31:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:01,288 INFO L225 Difference]: With dead ends: 770 [2022-04-05 02:31:01,289 INFO L226 Difference]: Without dead ends: 770 [2022-04-05 02:31:01,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-04-05 02:31:01,289 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 158 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:01,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 272 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:01,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-05 02:31:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-04-05 02:31:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-04-05 02:31:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-04-05 02:31:01,320 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-04-05 02:31:01,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:01,321 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-04-05 02:31:01,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:31:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-04-05 02:31:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 02:31:01,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:01,322 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-04-05 02:31:01,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:01,537 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 02:31:01,538 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-04-05 02:31:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:01,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296072200] [2022-04-05 02:31:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:01,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:01,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408604771] [2022-04-05 02:31:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:01,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:01,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:01,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 02:31:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:01,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 02:31:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:31:01,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:31:01,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:01,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296072200] [2022-04-05 02:31:01,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:01,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408604771] [2022-04-05 02:31:01,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408604771] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:01,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:01,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 02:31:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321994452] [2022-04-05 02:31:01,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:01,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 02:31:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 02:31:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:31:01,799 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:31:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:02,237 INFO L93 Difference]: Finished difference Result 1119 states and 1584 transitions. [2022-04-05 02:31:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-05 02:31:02,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-04-05 02:31:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:02,241 INFO L225 Difference]: With dead ends: 1119 [2022-04-05 02:31:02,241 INFO L226 Difference]: Without dead ends: 1119 [2022-04-05 02:31:02,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-04-05 02:31:02,244 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 222 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:02,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 416 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:31:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-04-05 02:31:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-04-05 02:31:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-04-05 02:31:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-04-05 02:31:02,289 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-04-05 02:31:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:02,289 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-04-05 02:31:02,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:31:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-04-05 02:31:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 02:31:02,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:02,290 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-05 02:31:02,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-05 02:31:02,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:02,506 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-04-05 02:31:02,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:02,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120034965] [2022-04-05 02:31:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:02,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646538110] [2022-04-05 02:31:02,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:31:02,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:02,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:02,539 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:02,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 02:31:02,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:31:02,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:31:02,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:31:02,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 02:31:02,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:31:02,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120034965] [2022-04-05 02:31:02,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646538110] [2022-04-05 02:31:02,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646538110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:31:02,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:31:02,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:31:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494457634] [2022-04-05 02:31:02,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:02,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:31:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:31:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:31:02,675 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:31:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:02,746 INFO L93 Difference]: Finished difference Result 1234 states and 1815 transitions. [2022-04-05 02:31:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:31:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-05 02:31:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:02,750 INFO L225 Difference]: With dead ends: 1234 [2022-04-05 02:31:02,751 INFO L226 Difference]: Without dead ends: 1234 [2022-04-05 02:31:02,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 02:31:02,751 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:02,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 170 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-04-05 02:31:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-04-05 02:31:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-04-05 02:31:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-04-05 02:31:02,780 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-04-05 02:31:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:02,780 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-04-05 02:31:02,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:31:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-04-05 02:31:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 02:31:02,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:02,781 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1] [2022-04-05 02:31:02,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:02,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 02:31:02,998 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-04-05 02:31:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:02,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687630461] [2022-04-05 02:31:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:03,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:03,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411808529] [2022-04-05 02:31:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:03,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:03,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:03,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:03,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 02:31:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-05 02:31:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 02:31:03,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 02:31:04,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687630461] [2022-04-05 02:31:04,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:04,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411808529] [2022-04-05 02:31:04,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411808529] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:04,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:04,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-05 02:31:04,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818919771] [2022-04-05 02:31:04,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:04,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 02:31:04,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:04,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 02:31:04,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-05 02:31:04,814 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 02:31:12,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:31:14,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:31:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:16,064 INFO L93 Difference]: Finished difference Result 1410 states and 2007 transitions. [2022-04-05 02:31:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 02:31:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-04-05 02:31:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:16,068 INFO L225 Difference]: With dead ends: 1410 [2022-04-05 02:31:16,069 INFO L226 Difference]: Without dead ends: 1404 [2022-04-05 02:31:16,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 02:31:16,069 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 175 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 301 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:16,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 511 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-04-05 02:31:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-04-05 02:31:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-04-05 02:31:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-04-05 02:31:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-04-05 02:31:16,104 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-04-05 02:31:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:16,104 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-04-05 02:31:16,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-05 02:31:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-04-05 02:31:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 02:31:16,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:16,105 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:16,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:16,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 02:31:16,322 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-04-05 02:31:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:16,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304198528] [2022-04-05 02:31:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:16,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:16,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619630206] [2022-04-05 02:31:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:16,338 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:16,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 02:31:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 02:31:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 02:31:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 02:31:16,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304198528] [2022-04-05 02:31:16,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619630206] [2022-04-05 02:31:16,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619630206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:16,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:16,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-05 02:31:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201777581] [2022-04-05 02:31:16,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:16,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 02:31:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 02:31:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-05 02:31:16,783 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 02:31:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:17,228 INFO L93 Difference]: Finished difference Result 2543 states and 3572 transitions. [2022-04-05 02:31:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 02:31:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-04-05 02:31:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:17,235 INFO L225 Difference]: With dead ends: 2543 [2022-04-05 02:31:17,235 INFO L226 Difference]: Without dead ends: 2543 [2022-04-05 02:31:17,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-04-05 02:31:17,236 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 370 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:17,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 510 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 02:31:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-04-05 02:31:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-04-05 02:31:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-04-05 02:31:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-04-05 02:31:17,285 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-04-05 02:31:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:17,285 INFO L478 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-04-05 02:31:17,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 02:31:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-04-05 02:31:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-05 02:31:17,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:17,286 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-04-05 02:31:17,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:17,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 02:31:17,503 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:17,503 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-04-05 02:31:17,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:17,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840669101] [2022-04-05 02:31:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:17,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:17,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:17,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558693585] [2022-04-05 02:31:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:17,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:17,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:17,518 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:17,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 02:31:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 02:31:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-05 02:31:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-05 02:31:17,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840669101] [2022-04-05 02:31:17,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558693585] [2022-04-05 02:31:17,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558693585] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:31:17,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:31:17,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-05 02:31:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782327570] [2022-04-05 02:31:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:17,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:31:17,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:31:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:31:17,956 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:31:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:18,019 INFO L93 Difference]: Finished difference Result 2465 states and 3473 transitions. [2022-04-05 02:31:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:31:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-04-05 02:31:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:18,025 INFO L225 Difference]: With dead ends: 2465 [2022-04-05 02:31:18,025 INFO L226 Difference]: Without dead ends: 2465 [2022-04-05 02:31:18,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:31:18,026 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:18,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 147 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:31:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-04-05 02:31:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-04-05 02:31:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-04-05 02:31:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-04-05 02:31:18,080 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-04-05 02:31:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:18,081 INFO L478 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-04-05 02:31:18,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:31:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-04-05 02:31:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-05 02:31:18,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:18,082 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:18,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:18,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:18,297 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-04-05 02:31:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977728741] [2022-04-05 02:31:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:18,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:18,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:18,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199299556] [2022-04-05 02:31:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:18,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:18,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:18,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 02:31:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:18,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 02:31:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-05 02:31:18,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:31:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977728741] [2022-04-05 02:31:18,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199299556] [2022-04-05 02:31:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199299556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:31:18,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:31:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:31:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570559771] [2022-04-05 02:31:18,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:18,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:31:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:31:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:31:18,433 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-05 02:31:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:18,478 INFO L93 Difference]: Finished difference Result 2578 states and 3563 transitions. [2022-04-05 02:31:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:31:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-04-05 02:31:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:18,486 INFO L225 Difference]: With dead ends: 2578 [2022-04-05 02:31:18,486 INFO L226 Difference]: Without dead ends: 2578 [2022-04-05 02:31:18,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:31:18,487 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:18,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:31:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-04-05 02:31:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-04-05 02:31:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-04-05 02:31:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-04-05 02:31:18,534 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-04-05 02:31:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:18,535 INFO L478 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-04-05 02:31:18,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-05 02:31:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-04-05 02:31:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 02:31:18,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:18,535 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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] [2022-04-05 02:31:18,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:18,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:18,752 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-04-05 02:31:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426488332] [2022-04-05 02:31:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:18,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:18,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693236462] [2022-04-05 02:31:18,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:31:18,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:18,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:18,776 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:18,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 02:31:18,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:31:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:31:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-05 02:31:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-05 02:31:20,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-05 02:31:21,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426488332] [2022-04-05 02:31:21,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:21,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693236462] [2022-04-05 02:31:21,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693236462] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:21,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:21,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-04-05 02:31:21,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964597766] [2022-04-05 02:31:21,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:21,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 02:31:21,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 02:31:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-04-05 02:31:21,625 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 02:31:32,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:31:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:38,394 INFO L93 Difference]: Finished difference Result 2867 states and 3884 transitions. [2022-04-05 02:31:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 02:31:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-04-05 02:31:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:38,402 INFO L225 Difference]: With dead ends: 2867 [2022-04-05 02:31:38,402 INFO L226 Difference]: Without dead ends: 2863 [2022-04-05 02:31:38,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-04-05 02:31:38,403 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 303 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 318 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:38,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 614 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1087 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-04-05 02:31:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-04-05 02:31:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-04-05 02:31:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-04-05 02:31:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-04-05 02:31:38,486 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-04-05 02:31:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:38,486 INFO L478 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-04-05 02:31:38,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 02:31:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-04-05 02:31:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-05 02:31:38,494 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:38,494 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:38,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:38,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-05 02:31:38,695 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-04-05 02:31:38,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:38,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767461153] [2022-04-05 02:31:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:38,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:38,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:38,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732701095] [2022-04-05 02:31:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:38,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:38,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:38,736 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:38,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 02:31:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:38,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-05 02:31:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-05 02:31:39,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-05 02:31:44,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767461153] [2022-04-05 02:31:44,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732701095] [2022-04-05 02:31:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732701095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:44,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:44,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-04-05 02:31:44,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896202395] [2022-04-05 02:31:44,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:44,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 02:31:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 02:31:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-04-05 02:31:44,934 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-05 02:31:58,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:03,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:20,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:26,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:31,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:41,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:44,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:48,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:32:50,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:03,707 INFO L93 Difference]: Finished difference Result 3538 states and 4858 transitions. [2022-04-05 02:33:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-05 02:33:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-04-05 02:33:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:03,718 INFO L225 Difference]: With dead ends: 3538 [2022-04-05 02:33:03,718 INFO L226 Difference]: Without dead ends: 3509 [2022-04-05 02:33:03,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=1724, Invalid=8988, Unknown=0, NotChecked=0, Total=10712 [2022-04-05 02:33:03,740 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 389 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 486 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:03,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 999 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 1975 Invalid, 9 Unknown, 0 Unchecked, 32.8s Time] [2022-04-05 02:33:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-04-05 02:33:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 3206. [2022-04-05 02:33:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 2285 states have (on average 1.3037199124726477) internal successors, (2979), 2334 states have internal predecessors, (2979), 745 states have call successors, (745), 177 states have call predecessors, (745), 175 states have return successors, (738), 694 states have call predecessors, (738), 738 states have call successors, (738) [2022-04-05 02:33:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 4462 transitions. [2022-04-05 02:33:03,836 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 4462 transitions. Word has length 88 [2022-04-05 02:33:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:03,837 INFO L478 AbstractCegarLoop]: Abstraction has 3206 states and 4462 transitions. [2022-04-05 02:33:03,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-05 02:33:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 4462 transitions. [2022-04-05 02:33:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-05 02:33:03,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:03,838 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:03,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:04,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-05 02:33:04,055 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-04-05 02:33:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:04,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91063645] [2022-04-05 02:33:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:04,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:04,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:04,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205495401] [2022-04-05 02:33:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:33:04,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:04,069 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:04,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 02:33:04,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 02:33:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:04,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 02:33:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-05 02:33:04,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-05 02:33:05,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91063645] [2022-04-05 02:33:05,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205495401] [2022-04-05 02:33:05,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205495401] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:05,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:05,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 02:33:05,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554209719] [2022-04-05 02:33:05,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:05,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:33:05,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:33:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:33:05,193 INFO L87 Difference]: Start difference. First operand 3206 states and 4462 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-05 02:33:09,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:10,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:14,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:14,802 INFO L93 Difference]: Finished difference Result 3413 states and 4749 transitions. [2022-04-05 02:33:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 02:33:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-04-05 02:33:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:14,844 INFO L225 Difference]: With dead ends: 3413 [2022-04-05 02:33:14,844 INFO L226 Difference]: Without dead ends: 3403 [2022-04-05 02:33:14,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-04-05 02:33:14,845 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 101 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 125 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:14,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 437 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 591 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2022-04-05 02:33:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2022-04-05 02:33:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3133. [2022-04-05 02:33:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 2217 states have (on average 1.3031123139377536) internal successors, (2889), 2261 states have internal predecessors, (2889), 740 states have call successors, (740), 177 states have call predecessors, (740), 175 states have return successors, (738), 694 states have call predecessors, (738), 738 states have call successors, (738) [2022-04-05 02:33:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 4367 transitions. [2022-04-05 02:33:14,982 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 4367 transitions. Word has length 97 [2022-04-05 02:33:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:14,982 INFO L478 AbstractCegarLoop]: Abstraction has 3133 states and 4367 transitions. [2022-04-05 02:33:14,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-05 02:33:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 4367 transitions. [2022-04-05 02:33:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-05 02:33:14,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:14,997 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:15,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:15,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:15,213 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-04-05 02:33:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:15,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139024416] [2022-04-05 02:33:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:15,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:15,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501730522] [2022-04-05 02:33:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:15,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:15,225 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:15,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 02:33:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 02:33:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-05 02:33:15,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 02:33:15,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139024416] [2022-04-05 02:33:15,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501730522] [2022-04-05 02:33:15,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501730522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:15,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:15,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-05 02:33:15,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925695126] [2022-04-05 02:33:15,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:15,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:33:15,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:33:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:33:15,740 INFO L87 Difference]: Start difference. First operand 3133 states and 4367 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 02:33:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:16,420 INFO L93 Difference]: Finished difference Result 6010 states and 8454 transitions. [2022-04-05 02:33:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 02:33:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-04-05 02:33:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:16,511 INFO L225 Difference]: With dead ends: 6010 [2022-04-05 02:33:16,511 INFO L226 Difference]: Without dead ends: 6010 [2022-04-05 02:33:16,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 02:33:16,511 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 686 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:16,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 703 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 02:33:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2022-04-05 02:33:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 5700. [2022-04-05 02:33:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 3784 states have (on average 1.2978329809725158) internal successors, (4911), 3806 states have internal predecessors, (4911), 1609 states have call successors, (1609), 308 states have call predecessors, (1609), 306 states have return successors, (1607), 1585 states have call predecessors, (1607), 1607 states have call successors, (1607) [2022-04-05 02:33:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 8127 transitions. [2022-04-05 02:33:16,620 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 8127 transitions. Word has length 98 [2022-04-05 02:33:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:16,620 INFO L478 AbstractCegarLoop]: Abstraction has 5700 states and 8127 transitions. [2022-04-05 02:33:16,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 02:33:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 8127 transitions. [2022-04-05 02:33:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-05 02:33:16,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:16,622 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-05 02:33:16,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:16,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:16,838 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-04-05 02:33:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:16,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615531540] [2022-04-05 02:33:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:16,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:16,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648647364] [2022-04-05 02:33:16,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:33:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:16,863 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:16,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 02:33:16,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:33:16,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-05 02:33:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-05 02:33:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-05 02:33:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:19,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615531540] [2022-04-05 02:33:19,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:19,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648647364] [2022-04-05 02:33:19,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648647364] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:19,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:19,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-05 02:33:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315586084] [2022-04-05 02:33:19,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:19,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:33:19,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:33:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:33:19,115 INFO L87 Difference]: Start difference. First operand 5700 states and 8127 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-05 02:33:23,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:25,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:29,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:30,864 INFO L93 Difference]: Finished difference Result 7652 states and 11072 transitions. [2022-04-05 02:33:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 02:33:30,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-04-05 02:33:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:30,879 INFO L225 Difference]: With dead ends: 7652 [2022-04-05 02:33:30,879 INFO L226 Difference]: Without dead ends: 7648 [2022-04-05 02:33:30,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 02:33:30,880 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 199 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 326 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:30,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 737 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1403 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-04-05 02:33:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7648 states. [2022-04-05 02:33:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7648 to 6125. [2022-04-05 02:33:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6125 states, 4000 states have (on average 1.30625) internal successors, (5225), 4022 states have internal predecessors, (5225), 1793 states have call successors, (1793), 333 states have call predecessors, (1793), 331 states have return successors, (1791), 1769 states have call predecessors, (1791), 1791 states have call successors, (1791) [2022-04-05 02:33:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6125 states to 6125 states and 8809 transitions. [2022-04-05 02:33:30,991 INFO L78 Accepts]: Start accepts. Automaton has 6125 states and 8809 transitions. Word has length 108 [2022-04-05 02:33:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:30,991 INFO L478 AbstractCegarLoop]: Abstraction has 6125 states and 8809 transitions. [2022-04-05 02:33:30,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-05 02:33:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6125 states and 8809 transitions. [2022-04-05 02:33:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-05 02:33:30,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:30,992 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:31,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:31,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-05 02:33:31,209 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-04-05 02:33:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602219125] [2022-04-05 02:33:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:31,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:31,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067761985] [2022-04-05 02:33:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:31,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:31,231 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:31,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 02:33:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 02:33:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-05 02:33:31,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 02:33:31,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:31,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602219125] [2022-04-05 02:33:31,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:31,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067761985] [2022-04-05 02:33:31,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067761985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:31,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:31,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-05 02:33:31,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667406925] [2022-04-05 02:33:31,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:31,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:33:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:31,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:33:31,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:33:31,894 INFO L87 Difference]: Start difference. First operand 6125 states and 8809 transitions. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 02:33:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:32,505 INFO L93 Difference]: Finished difference Result 6128 states and 8394 transitions. [2022-04-05 02:33:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 02:33:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-04-05 02:33:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:32,519 INFO L225 Difference]: With dead ends: 6128 [2022-04-05 02:33:32,519 INFO L226 Difference]: Without dead ends: 6128 [2022-04-05 02:33:32,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 02:33:32,520 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 573 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:32,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 667 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:33:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2022-04-05 02:33:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 6055. [2022-04-05 02:33:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 3966 states have (on average 1.2148260211800304) internal successors, (4818), 3982 states have internal predecessors, (4818), 1757 states have call successors, (1757), 333 states have call predecessors, (1757), 331 states have return successors, (1755), 1739 states have call predecessors, (1755), 1755 states have call successors, (1755) [2022-04-05 02:33:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 8330 transitions. [2022-04-05 02:33:32,634 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 8330 transitions. Word has length 105 [2022-04-05 02:33:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:32,634 INFO L478 AbstractCegarLoop]: Abstraction has 6055 states and 8330 transitions. [2022-04-05 02:33:32,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-05 02:33:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 8330 transitions. [2022-04-05 02:33:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-05 02:33:32,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:32,637 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-04-05 02:33:32,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:32,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-05 02:33:32,852 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-04-05 02:33:32,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:32,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486097609] [2022-04-05 02:33:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:32,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:32,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:32,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644171122] [2022-04-05 02:33:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:33:32,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:32,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:32,864 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:32,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 02:33:32,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:33:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 02:33:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-05 02:33:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-05 02:33:33,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486097609] [2022-04-05 02:33:33,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:33,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644171122] [2022-04-05 02:33:33,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644171122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:33,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:33,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-04-05 02:33:33,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289271356] [2022-04-05 02:33:33,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:33,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:33:33,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:33,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:33:33,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:33:33,499 INFO L87 Difference]: Start difference. First operand 6055 states and 8330 transitions. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-04-05 02:33:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:34,099 INFO L93 Difference]: Finished difference Result 6134 states and 8370 transitions. [2022-04-05 02:33:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 02:33:34,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) Word has length 132 [2022-04-05 02:33:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:34,111 INFO L225 Difference]: With dead ends: 6134 [2022-04-05 02:33:34,111 INFO L226 Difference]: Without dead ends: 6134 [2022-04-05 02:33:34,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=592, Invalid=1048, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 02:33:34,112 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 486 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:34,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 704 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:33:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2022-04-05 02:33:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 6089. [2022-04-05 02:33:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6089 states, 4000 states have (on average 1.2055) internal successors, (4822), 4016 states have internal predecessors, (4822), 1757 states have call successors, (1757), 333 states have call predecessors, (1757), 331 states have return successors, (1755), 1739 states have call predecessors, (1755), 1755 states have call successors, (1755) [2022-04-05 02:33:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 8334 transitions. [2022-04-05 02:33:34,190 INFO L78 Accepts]: Start accepts. Automaton has 6089 states and 8334 transitions. Word has length 132 [2022-04-05 02:33:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:34,190 INFO L478 AbstractCegarLoop]: Abstraction has 6089 states and 8334 transitions. [2022-04-05 02:33:34,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-04-05 02:33:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6089 states and 8334 transitions. [2022-04-05 02:33:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-05 02:33:34,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:34,193 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-04-05 02:33:34,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:34,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-05 02:33:34,409 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1118265052, now seen corresponding path program 3 times [2022-04-05 02:33:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260853708] [2022-04-05 02:33:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:34,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:34,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894479348] [2022-04-05 02:33:34,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:33:34,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:34,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:34,419 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:34,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 02:33:34,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 02:33:34,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-05 02:33:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:35,466 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:33:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 90 proven. 51 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-04-05 02:33:36,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:41,698 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:33:46,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260853708] [2022-04-05 02:33:46,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894479348] [2022-04-05 02:33:46,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894479348] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 02:33:46,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:33:46,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-05 02:33:46,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766119094] [2022-04-05 02:33:46,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:46,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 02:33:46,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 02:33:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=466, Unknown=3, NotChecked=0, Total=552 [2022-04-05 02:33:46,456 INFO L87 Difference]: Start difference. First operand 6089 states and 8334 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-05 02:33:51,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:53,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:57,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:59,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:00,376 INFO L93 Difference]: Finished difference Result 7033 states and 9596 transitions. [2022-04-05 02:34:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 02:34:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 138 [2022-04-05 02:34:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:00,422 INFO L225 Difference]: With dead ends: 7033 [2022-04-05 02:34:00,423 INFO L226 Difference]: Without dead ends: 7030 [2022-04-05 02:34:00,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=172, Invalid=945, Unknown=5, NotChecked=0, Total=1122 [2022-04-05 02:34:00,423 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 103 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 99 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:00,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 598 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 958 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2022-04-05 02:34:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2022-04-05 02:34:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6836. [2022-04-05 02:34:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 4476 states have (on average 1.2057640750670242) internal successors, (5397), 4492 states have internal predecessors, (5397), 1993 states have call successors, (1993), 368 states have call predecessors, (1993), 366 states have return successors, (1991), 1975 states have call predecessors, (1991), 1991 states have call successors, (1991) [2022-04-05 02:34:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 9381 transitions. [2022-04-05 02:34:00,520 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 9381 transitions. Word has length 138 [2022-04-05 02:34:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:00,521 INFO L478 AbstractCegarLoop]: Abstraction has 6836 states and 9381 transitions. [2022-04-05 02:34:00,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-05 02:34:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 9381 transitions. [2022-04-05 02:34:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-05 02:34:00,524 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:00,524 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-05 02:34:00,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:00,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-05 02:34:00,740 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1657425713, now seen corresponding path program 4 times [2022-04-05 02:34:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:00,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115191992] [2022-04-05 02:34:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:00,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58902435] [2022-04-05 02:34:00,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 02:34:00,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:00,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:00,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:00,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 02:34:00,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 02:34:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:34:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-05 02:34:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 95 proven. 148 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-04-05 02:34:01,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:02,280 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:34:05,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115191992] [2022-04-05 02:34:05,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58902435] [2022-04-05 02:34:05,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58902435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 02:34:05,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:34:05,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-05 02:34:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016000996] [2022-04-05 02:34:05,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:05,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 02:34:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 02:34:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-04-05 02:34:05,061 INFO L87 Difference]: Start difference. First operand 6836 states and 9381 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 02:34:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:07,201 INFO L93 Difference]: Finished difference Result 7202 states and 9840 transitions. [2022-04-05 02:34:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 02:34:07,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 145 [2022-04-05 02:34:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:07,241 INFO L225 Difference]: With dead ends: 7202 [2022-04-05 02:34:07,241 INFO L226 Difference]: Without dead ends: 7199 [2022-04-05 02:34:07,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-04-05 02:34:07,256 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 130 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:07,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1109 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-05 02:34:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2022-04-05 02:34:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 7077. [2022-04-05 02:34:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 4623 states have (on average 1.2061431970581873) internal successors, (5576), 4639 states have internal predecessors, (5576), 2069 states have call successors, (2069), 386 states have call predecessors, (2069), 384 states have return successors, (2067), 2051 states have call predecessors, (2067), 2067 states have call successors, (2067) [2022-04-05 02:34:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 9712 transitions. [2022-04-05 02:34:07,395 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 9712 transitions. Word has length 145 [2022-04-05 02:34:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:07,396 INFO L478 AbstractCegarLoop]: Abstraction has 7077 states and 9712 transitions. [2022-04-05 02:34:07,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 02:34:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 9712 transitions. [2022-04-05 02:34:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-05 02:34:07,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:07,401 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-04-05 02:34:07,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:07,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-05 02:34:07,614 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1291712014, now seen corresponding path program 5 times [2022-04-05 02:34:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:07,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357480444] [2022-04-05 02:34:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:07,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422020100] [2022-04-05 02:34:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 02:34:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:07,623 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:07,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 02:34:07,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-04-05 02:34:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:34:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-05 02:34:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 77 proven. 170 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-04-05 02:34:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-04-05 02:34:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357480444] [2022-04-05 02:34:19,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422020100] [2022-04-05 02:34:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422020100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:19,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:19,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-04-05 02:34:19,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16193680] [2022-04-05 02:34:19,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:19,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 02:34:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 02:34:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 02:34:19,563 INFO L87 Difference]: Start difference. First operand 7077 states and 9712 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-04-05 02:34:29,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:35,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:38,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:45,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:49,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:00,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:06,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:08,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:13,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:18,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:20,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:43,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:51,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:00,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:24,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:26,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:31,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:46,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:50,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:36:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:36:53,238 INFO L93 Difference]: Finished difference Result 10053 states and 14039 transitions. [2022-04-05 02:36:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-05 02:36:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 161 [2022-04-05 02:36:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:36:53,273 INFO L225 Difference]: With dead ends: 10053 [2022-04-05 02:36:53,273 INFO L226 Difference]: Without dead ends: 10049 [2022-04-05 02:36:53,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4037 ImplicationChecksByTransitivity, 78.6s TimeCoverageRelationStatistics Valid=2343, Invalid=10767, Unknown=0, NotChecked=0, Total=13110 [2022-04-05 02:36:53,276 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 492 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 1062 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:36:53,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1337 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 3271 Invalid, 13 Unknown, 0 Unchecked, 81.4s Time] [2022-04-05 02:36:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10049 states. [2022-04-05 02:36:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10049 to 8379. [2022-04-05 02:36:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8379 states, 5407 states have (on average 1.2187904568152395) internal successors, (6590), 5425 states have internal predecessors, (6590), 2529 states have call successors, (2529), 444 states have call predecessors, (2529), 442 states have return successors, (2527), 2509 states have call predecessors, (2527), 2527 states have call successors, (2527) [2022-04-05 02:36:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 11646 transitions. [2022-04-05 02:36:53,576 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 11646 transitions. Word has length 161 [2022-04-05 02:36:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:36:53,577 INFO L478 AbstractCegarLoop]: Abstraction has 8379 states and 11646 transitions. [2022-04-05 02:36:53,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-04-05 02:36:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 11646 transitions. [2022-04-05 02:36:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-05 02:36:53,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:36:53,583 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-04-05 02:36:53,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-05 02:36:53,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:36:53,784 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:36:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:36:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 6 times [2022-04-05 02:36:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:36:53,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152600281] [2022-04-05 02:36:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:36:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:36:53,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:36:53,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380548060] [2022-04-05 02:36:53,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 02:36:53,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:36:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:36:53,794 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:36:53,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 02:36:53,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-05 02:36:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:36:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 02:36:53,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:36:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-05 02:36:54,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:36:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-04-05 02:36:54,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:36:54,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152600281] [2022-04-05 02:36:54,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:36:54,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380548060] [2022-04-05 02:36:54,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380548060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:36:54,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:36:54,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-05 02:36:54,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548767710] [2022-04-05 02:36:54,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:36:54,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 02:36:54,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:36:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 02:36:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:36:54,388 INFO L87 Difference]: Start difference. First operand 8379 states and 11646 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-04-05 02:36:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:36:54,561 INFO L93 Difference]: Finished difference Result 10012 states and 13994 transitions. [2022-04-05 02:36:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 02:36:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-04-05 02:36:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:36:54,588 INFO L225 Difference]: With dead ends: 10012 [2022-04-05 02:36:54,589 INFO L226 Difference]: Without dead ends: 10012 [2022-04-05 02:36:54,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:36:54,591 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 26 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:36:54,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:36:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2022-04-05 02:36:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 9352. [2022-04-05 02:36:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9352 states, 6122 states have (on average 1.2267232930414897) internal successors, (7510), 6188 states have internal predecessors, (7510), 2814 states have call successors, (2814), 417 states have call predecessors, (2814), 415 states have return successors, (2812), 2746 states have call predecessors, (2812), 2812 states have call successors, (2812) [2022-04-05 02:36:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9352 states to 9352 states and 13136 transitions. [2022-04-05 02:36:54,777 INFO L78 Accepts]: Start accepts. Automaton has 9352 states and 13136 transitions. Word has length 165 [2022-04-05 02:36:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:36:54,777 INFO L478 AbstractCegarLoop]: Abstraction has 9352 states and 13136 transitions. [2022-04-05 02:36:54,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-04-05 02:36:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 9352 states and 13136 transitions. [2022-04-05 02:36:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-05 02:36:54,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:36:54,784 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 10, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:36:54,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-05 02:36:55,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-05 02:36:55,001 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:36:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:36:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1364196507, now seen corresponding path program 1 times [2022-04-05 02:36:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:36:55,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76445279] [2022-04-05 02:36:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:36:55,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:36:55,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:36:55,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610724035] [2022-04-05 02:36:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:36:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:36:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:36:55,015 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:36:55,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-05 02:36:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 02:36:55,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-05 02:36:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 02:36:55,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-05 02:36:55,591 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-05 02:36:55,592 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 02:36:55,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-05 02:36:55,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:36:55,811 INFO L719 BasicCegarLoop]: Path program histogram: [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:36:55,813 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 02:36:55,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:36:55 BasicIcfg [2022-04-05 02:36:55,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 02:36:55,899 INFO L158 Benchmark]: Toolchain (without parser) took 363990.86ms. Allocated memory was 221.2MB in the beginning and 329.3MB in the end (delta: 108.0MB). Free memory was 172.4MB in the beginning and 88.0MB in the end (delta: 84.5MB). Peak memory consumption was 193.4MB. Max. memory is 8.0GB. [2022-04-05 02:36:55,899 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 221.2MB. Free memory was 189.2MB in the beginning and 189.1MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 02:36:55,899 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.23ms. Allocated memory is still 221.2MB. Free memory was 172.3MB in the beginning and 196.8MB in the end (delta: -24.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 02:36:55,899 INFO L158 Benchmark]: Boogie Preprocessor took 35.03ms. Allocated memory is still 221.2MB. Free memory was 196.8MB in the beginning and 195.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 02:36:55,899 INFO L158 Benchmark]: RCFGBuilder took 276.66ms. Allocated memory is still 221.2MB. Free memory was 195.5MB in the beginning and 183.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 02:36:55,900 INFO L158 Benchmark]: IcfgTransformer took 22.20ms. Allocated memory is still 221.2MB. Free memory was 183.9MB in the beginning and 182.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 02:36:55,900 INFO L158 Benchmark]: TraceAbstraction took 363389.00ms. Allocated memory was 221.2MB in the beginning and 329.3MB in the end (delta: 108.0MB). Free memory was 182.1MB in the beginning and 88.0MB in the end (delta: 94.1MB). Peak memory consumption was 203.4MB. Max. memory is 8.0GB. [2022-04-05 02:36:55,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 221.2MB. Free memory was 189.2MB in the beginning and 189.1MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 264.23ms. Allocated memory is still 221.2MB. Free memory was 172.3MB in the beginning and 196.8MB in the end (delta: -24.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.03ms. Allocated memory is still 221.2MB. Free memory was 196.8MB in the beginning and 195.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 276.66ms. Allocated memory is still 221.2MB. Free memory was 195.5MB in the beginning and 183.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.20ms. Allocated memory is still 221.2MB. Free memory was 183.9MB in the beginning and 182.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 363389.00ms. Allocated memory was 221.2MB in the beginning and 329.3MB in the end (delta: 108.0MB). Free memory was 182.1MB in the beginning and 88.0MB in the end (delta: 94.1MB). Peak memory consumption was 203.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=27, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=13, b=21, counter=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=21, c=13, counter=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=21, b=13, c=13, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=13, b=8, c=8, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] COND FALSE !(counter++<20) [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] COND FALSE !(counter++<20) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] COND FALSE !(counter++<20) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=23] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 363.3s, OverallIterations: 32, TraceHistogramMax: 21, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 303.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 5244 SdHoareTripleChecker+Valid, 168.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5128 mSDsluCounter, 12988 SdHoareTripleChecker+Invalid, 165.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10904 mSDsCounter, 4608 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16093 IncrementalHoareTripleChecker+Invalid, 20731 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4608 mSolverCounterUnsat, 2084 mSDtfsCounter, 16093 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4042 GetRequests, 3269 SyntacticMatches, 24 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10321 ImplicationChecksByTransitivity, 158.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9352occurred in iteration=31, InterpolantAutomatonStates: 641, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 31 MinimizatonAttempts, 6374 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 47.5s InterpolantComputationTime, 2299 NumberOfCodeBlocks, 2196 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 3513 ConstructedInterpolants, 0 QuantifiedInterpolants, 24740 SizeOfPredicates, 209 NumberOfNonLiveVariables, 6426 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 49 InterpolantComputations, 12 PerfectInterpolantSequences, 7042/8738 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-05 02:36:56,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...