/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/ps4-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:40:43,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:40:43,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:40:43,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 04:40:43,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 04:40:43,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 04:40:43,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 04:40:43,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 04:40:43,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 04:40:43,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 04:40:43,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 04:40:43,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 04:40:43,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:40:43,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:40:43,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:40:43,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:40:43,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:40:43,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:40:43,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:40:43,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:40:43,359 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:40:43,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:40:43,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:40:43,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:40:43,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:40:43,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 04:40:43,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 04:40:43,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 04:40:43,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 04:40:43,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 04:40:43,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 04:40:43,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 04:40:43,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 04:40:43,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 04:40:43,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 04:40:43,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 04:40:43,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 04:40:43,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 04:40:43,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 04:40:43,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:40:43,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:40:43,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:40:43,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:40:43,383 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:40:43,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:40:43,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:40:43,384 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:40:43,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:40:43,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:40:43,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:40:43,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:40:43,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:40:43,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:40:43,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:40:43,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:40:43,386 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:40:43,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:40:43,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:40:43,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:40:43,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:40:43,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:40:43,625 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:40:43,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4-ll.c [2022-03-20 04:40:43,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8306faedb/e9055111ee56478eaa050e7cbb4d3dec/FLAG65c2f49cd [2022-03-20 04:40:44,023 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:40:44,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c [2022-03-20 04:40:44,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8306faedb/e9055111ee56478eaa050e7cbb4d3dec/FLAG65c2f49cd [2022-03-20 04:40:44,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8306faedb/e9055111ee56478eaa050e7cbb4d3dec [2022-03-20 04:40:44,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:40:44,040 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:40:44,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:40:44,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:40:44,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:40:44,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eadbb10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44, skipping insertion in model container [2022-03-20 04:40:44,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:40:44,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:40:44,182 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/ps4-ll.c[458,471] [2022-03-20 04:40:44,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:40:44,235 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:40:44,258 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/ps4-ll.c[458,471] [2022-03-20 04:40:44,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:40:44,281 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:40:44,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44 WrapperNode [2022-03-20 04:40:44,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:40:44,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:40:44,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:40:44,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:40:44,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:40:44,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:40:44,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:40:44,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:40:44,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:40:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:44,358 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) [2022-03-20 04:40:44,363 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 [2022-03-20 04:40:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:40:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:40:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:40:44,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 04:40:44,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:40:44,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:40:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:40:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:40:44,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:40:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:40:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 04:40:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 04:40:44,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:40:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:40:44,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:40:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:40:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:40:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:40:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:40:44,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:40:44,441 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:40:44,442 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:40:44,538 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:40:44,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:40:44,545 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 04:40:44,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:40:44 BoogieIcfgContainer [2022-03-20 04:40:44,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:40:44,547 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:40:44,547 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:40:44,548 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:40:44,550 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:40:44" (1/1) ... [2022-03-20 04:40:44,551 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:40:44,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:40:44 BasicIcfg [2022-03-20 04:40:44,569 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:40:44,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:40:44,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:40:44,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:40:44,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:40:44" (1/4) ... [2022-03-20 04:40:44,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76712b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:40:44, skipping insertion in model container [2022-03-20 04:40:44,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:40:44" (2/4) ... [2022-03-20 04:40:44,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76712b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:40:44, skipping insertion in model container [2022-03-20 04:40:44,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:40:44" (3/4) ... [2022-03-20 04:40:44,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76712b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:40:44, skipping insertion in model container [2022-03-20 04:40:44,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:40:44" (4/4) ... [2022-03-20 04:40:44,587 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll.cJordan [2022-03-20 04:40:44,591 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:40:44,591 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:40:44,623 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:40:44,628 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 [2022-03-20 04:40:44,628 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:40:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 04:40:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 04:40:44,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:44,659 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:44,659 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1382868560, now seen corresponding path program 1 times [2022-03-20 04:40:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26930183] [2022-03-20 04:40:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:40:44,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:40:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:40:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:40:44,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26930183] [2022-03-20 04:40:44,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26930183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:40:44,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:40:44,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:40:44,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552603270] [2022-03-20 04:40:44,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:40:44,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:40:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:40:44,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:40:44,873 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:40:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:44,932 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 04:40:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:40:44,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 04:40:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:44,941 INFO L225 Difference]: With dead ends: 22 [2022-03-20 04:40:44,941 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 04:40:44,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:40:44,946 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:44,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:40:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 04:40:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 04:40:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:40:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-20 04:40:44,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-20 04:40:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:44,978 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-20 04:40:44,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:40:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-20 04:40:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 04:40:44,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:44,980 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:44,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:40:44,981 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1384745393, now seen corresponding path program 1 times [2022-03-20 04:40:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:44,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695330825] [2022-03-20 04:40:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:45,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:45,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137741723] [2022-03-20 04:40:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:45,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:45,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:45,032 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) [2022-03-20 04:40:45,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:40:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:40:45,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:40:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:40:45,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:40:45,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695330825] [2022-03-20 04:40:45,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:45,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137741723] [2022-03-20 04:40:45,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137741723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:40:45,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:40:45,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:40:45,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995191664] [2022-03-20 04:40:45,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:40:45,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:40:45,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:40:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:40:45,213 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:40:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:45,273 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-20 04:40:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:40:45,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 04:40:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:45,274 INFO L225 Difference]: With dead ends: 26 [2022-03-20 04:40:45,274 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 04:40:45,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:40:45,275 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:45,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:40:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 04:40:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 04:40:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 04:40:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 04:40:45,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2022-03-20 04:40:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:45,280 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 04:40:45,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:40:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 04:40:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 04:40:45,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:45,281 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:45,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:45,500 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 [2022-03-20 04:40:45,501 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash -803685984, now seen corresponding path program 1 times [2022-03-20 04:40:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752721658] [2022-03-20 04:40:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:45,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:45,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761464322] [2022-03-20 04:40:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:45,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:45,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:45,538 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) [2022-03-20 04:40:45,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:40:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:40:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 04:40:45,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:40:45,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 04:40:46,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:46,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752721658] [2022-03-20 04:40:46,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761464322] [2022-03-20 04:40:46,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761464322] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:46,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:46,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 04:40:46,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187290347] [2022-03-20 04:40:46,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:40:46,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:40:46,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:40:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 04:40:46,248 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 04:40:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:46,272 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-03-20 04:40:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:40:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 04:40:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:46,273 INFO L225 Difference]: With dead ends: 28 [2022-03-20 04:40:46,274 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 04:40:46,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:40:46,275 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:46,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:40:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 04:40:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 04:40:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:40:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-20 04:40:46,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2022-03-20 04:40:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:46,279 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-20 04:40:46,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 04:40:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-20 04:40:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 04:40:46,279 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:46,280 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:46,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:46,499 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 [2022-03-20 04:40:46,500 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash 842365436, now seen corresponding path program 1 times [2022-03-20 04:40:46,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:46,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031685431] [2022-03-20 04:40:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:46,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:46,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:46,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33727987] [2022-03-20 04:40:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:46,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:46,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:46,510 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) [2022-03-20 04:40:46,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:40:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:40:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 04:40:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:40:46,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:46,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031685431] [2022-03-20 04:40:46,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33727987] [2022-03-20 04:40:46,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33727987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:46,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:46,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 04:40:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792108445] [2022-03-20 04:40:46,840 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:46,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 04:40:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 04:40:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:40:46,841 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:40:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:46,886 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-03-20 04:40:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:40:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-03-20 04:40:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:46,888 INFO L225 Difference]: With dead ends: 31 [2022-03-20 04:40:46,888 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 04:40:46,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:40:46,889 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:46,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:40:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 04:40:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 04:40:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 04:40:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-03-20 04:40:46,893 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2022-03-20 04:40:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:46,893 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-03-20 04:40:46,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 04:40:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-03-20 04:40:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 04:40:46,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:46,894 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:46,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:47,107 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 [2022-03-20 04:40:47,108 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:47,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:47,110 INFO L85 PathProgramCache]: Analyzing trace with hash 186246765, now seen corresponding path program 2 times [2022-03-20 04:40:47,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:47,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413324796] [2022-03-20 04:40:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:47,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:47,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4987922] [2022-03-20 04:40:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:40:47,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:47,119 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) [2022-03-20 04:40:47,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 04:40:47,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:40:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 04:40:47,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 04:40:47,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:47,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413324796] [2022-03-20 04:40:47,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4987922] [2022-03-20 04:40:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4987922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:47,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:47,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 04:40:47,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958283211] [2022-03-20 04:40:47,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:47,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:40:47,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:40:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:40:47,456 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 04:40:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:47,517 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-03-20 04:40:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:40:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-03-20 04:40:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:47,518 INFO L225 Difference]: With dead ends: 34 [2022-03-20 04:40:47,518 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 04:40:47,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-20 04:40:47,518 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:47,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:40:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 04:40:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 04:40:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 04:40:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-20 04:40:47,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 31 [2022-03-20 04:40:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:47,522 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-20 04:40:47,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 04:40:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-20 04:40:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 04:40:47,523 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:47,523 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:47,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:47,743 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 [2022-03-20 04:40:47,744 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 50907356, now seen corresponding path program 3 times [2022-03-20 04:40:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:47,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409146934] [2022-03-20 04:40:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:47,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:47,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075844191] [2022-03-20 04:40:47,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:40:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:47,753 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) [2022-03-20 04:40:47,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 04:40:47,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 04:40:47,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:47,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 04:40:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 04:40:47,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:48,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409146934] [2022-03-20 04:40:48,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075844191] [2022-03-20 04:40:48,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075844191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:48,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:48,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 04:40:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273194688] [2022-03-20 04:40:48,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:48,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 04:40:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 04:40:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:40:48,132 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 04:40:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:48,210 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-03-20 04:40:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:40:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2022-03-20 04:40:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:48,213 INFO L225 Difference]: With dead ends: 37 [2022-03-20 04:40:48,213 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 04:40:48,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 04:40:48,217 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:48,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 162 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:40:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 04:40:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 04:40:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 04:40:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 04:40:48,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 38 [2022-03-20 04:40:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:48,222 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 04:40:48,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 04:40:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 04:40:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 04:40:48,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:48,223 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:48,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 04:40:48,442 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 [2022-03-20 04:40:48,443 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1214637171, now seen corresponding path program 4 times [2022-03-20 04:40:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:48,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368463175] [2022-03-20 04:40:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:48,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:48,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:48,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649468285] [2022-03-20 04:40:48,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:40:48,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:48,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:48,472 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) [2022-03-20 04:40:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 04:40:48,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:40:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 04:40:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 04:40:48,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368463175] [2022-03-20 04:40:48,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:48,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649468285] [2022-03-20 04:40:48,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649468285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:48,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:48,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 04:40:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128064272] [2022-03-20 04:40:48,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:48,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:40:48,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:40:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 04:40:48,875 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 04:40:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:48,974 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-20 04:40:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 04:40:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 45 [2022-03-20 04:40:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:48,975 INFO L225 Difference]: With dead ends: 40 [2022-03-20 04:40:48,975 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 04:40:48,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 04:40:48,976 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:48,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 201 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:40:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 04:40:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 04:40:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 04:40:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-20 04:40:48,980 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 45 [2022-03-20 04:40:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:48,980 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-20 04:40:48,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 04:40:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-20 04:40:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 04:40:48,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:48,981 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:49,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:49,199 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 [2022-03-20 04:40:49,200 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash -520581188, now seen corresponding path program 5 times [2022-03-20 04:40:49,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:49,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16470635] [2022-03-20 04:40:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:49,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:49,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771041460] [2022-03-20 04:40:49,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:40:49,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:49,216 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) [2022-03-20 04:40:49,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:40:49,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 04:40:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 04:40:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 04:40:49,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:49,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16470635] [2022-03-20 04:40:49,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771041460] [2022-03-20 04:40:49,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771041460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:49,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:49,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 04:40:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126002243] [2022-03-20 04:40:49,647 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:49,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 04:40:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 04:40:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 04:40:49,648 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 04:40:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:49,758 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-20 04:40:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 04:40:49,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2022-03-20 04:40:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:49,759 INFO L225 Difference]: With dead ends: 43 [2022-03-20 04:40:49,759 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 04:40:49,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 04:40:49,760 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:49,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 244 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:40:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 04:40:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 04:40:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 04:40:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-03-20 04:40:49,764 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 52 [2022-03-20 04:40:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:49,765 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-03-20 04:40:49,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 04:40:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-03-20 04:40:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 04:40:49,766 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:49,766 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:49,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:49,987 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 [2022-03-20 04:40:49,988 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 747034797, now seen corresponding path program 6 times [2022-03-20 04:40:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035472777] [2022-03-20 04:40:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:49,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:49,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19603339] [2022-03-20 04:40:49,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:40:49,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:49,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:49,996 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) [2022-03-20 04:40:49,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 04:40:50,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 04:40:50,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 04:40:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 04:40:50,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:50,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035472777] [2022-03-20 04:40:50,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19603339] [2022-03-20 04:40:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19603339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:50,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:50,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 04:40:50,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298371923] [2022-03-20 04:40:50,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:50,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 04:40:50,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 04:40:50,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 04:40:50,943 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 04:40:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:51,082 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-03-20 04:40:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 04:40:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 59 [2022-03-20 04:40:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:51,083 INFO L225 Difference]: With dead ends: 46 [2022-03-20 04:40:51,083 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 04:40:51,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-20 04:40:51,084 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:51,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 291 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:40:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 04:40:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 04:40:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 04:40:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-03-20 04:40:51,088 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 59 [2022-03-20 04:40:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:51,088 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-03-20 04:40:51,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 04:40:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-03-20 04:40:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 04:40:51,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:51,089 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:51,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:51,299 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 [2022-03-20 04:40:51,299 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2066559332, now seen corresponding path program 7 times [2022-03-20 04:40:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:51,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926231513] [2022-03-20 04:40:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:51,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:51,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216347373] [2022-03-20 04:40:51,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:40:51,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:51,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:51,324 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) [2022-03-20 04:40:51,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 04:40:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:40:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 04:40:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 04:40:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926231513] [2022-03-20 04:40:52,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216347373] [2022-03-20 04:40:52,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216347373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:52,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:52,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 04:40:52,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176981830] [2022-03-20 04:40:52,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:52,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 04:40:52,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 04:40:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 04:40:52,049 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 04:40:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:52,213 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-20 04:40:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 04:40:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 66 [2022-03-20 04:40:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:52,214 INFO L225 Difference]: With dead ends: 49 [2022-03-20 04:40:52,214 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 04:40:52,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 04:40:52,215 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:52,215 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 342 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:40:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 04:40:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 04:40:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 04:40:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-03-20 04:40:52,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 66 [2022-03-20 04:40:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:52,218 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-03-20 04:40:52,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 04:40:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-03-20 04:40:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 04:40:52,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:52,220 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:52,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:52,425 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 [2022-03-20 04:40:52,426 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash -850256435, now seen corresponding path program 8 times [2022-03-20 04:40:52,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:52,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245072110] [2022-03-20 04:40:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:52,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:52,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571094884] [2022-03-20 04:40:52,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:40:52,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:52,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:52,444 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) [2022-03-20 04:40:52,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 04:40:52,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:40:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 04:40:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 04:40:53,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:53,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245072110] [2022-03-20 04:40:53,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571094884] [2022-03-20 04:40:53,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571094884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:53,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:53,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 04:40:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560690327] [2022-03-20 04:40:53,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:53,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 04:40:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 04:40:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 04:40:53,401 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 04:40:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:53,575 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-20 04:40:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 04:40:53,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 73 [2022-03-20 04:40:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:53,577 INFO L225 Difference]: With dead ends: 52 [2022-03-20 04:40:53,577 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 04:40:53,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 04:40:53,578 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:53,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 397 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:40:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 04:40:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 04:40:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 04:40:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-03-20 04:40:53,583 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 73 [2022-03-20 04:40:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:53,583 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-03-20 04:40:53,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 04:40:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-03-20 04:40:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 04:40:53,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:53,584 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:53,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:53,791 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 [2022-03-20 04:40:53,791 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 652576124, now seen corresponding path program 9 times [2022-03-20 04:40:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020605599] [2022-03-20 04:40:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:53,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62389453] [2022-03-20 04:40:53,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:40:53,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:53,802 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) [2022-03-20 04:40:53,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 04:40:54,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 04:40:54,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 04:40:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 04:40:55,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:55,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:55,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020605599] [2022-03-20 04:40:55,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:55,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62389453] [2022-03-20 04:40:55,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62389453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:55,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:55,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 04:40:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76004732] [2022-03-20 04:40:55,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:55,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 04:40:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 04:40:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-20 04:40:55,176 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 04:40:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:55,359 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-03-20 04:40:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 04:40:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 80 [2022-03-20 04:40:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:55,360 INFO L225 Difference]: With dead ends: 55 [2022-03-20 04:40:55,360 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 04:40:55,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-20 04:40:55,360 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:55,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 456 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:40:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 04:40:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 04:40:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 14 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 04:40:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-03-20 04:40:55,364 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 80 [2022-03-20 04:40:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:55,364 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-03-20 04:40:55,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 04:40:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-03-20 04:40:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 04:40:55,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:55,365 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:55,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:55,565 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 [2022-03-20 04:40:55,565 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash 233695981, now seen corresponding path program 10 times [2022-03-20 04:40:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:55,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154927301] [2022-03-20 04:40:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:55,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:55,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906689078] [2022-03-20 04:40:55,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:40:55,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:55,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:55,580 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) [2022-03-20 04:40:55,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 04:40:56,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:40:56,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 04:40:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 04:40:56,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:40:56,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:40:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154927301] [2022-03-20 04:40:56,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:40:56,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906689078] [2022-03-20 04:40:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906689078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:40:56,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:40:56,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 04:40:56,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523034515] [2022-03-20 04:40:56,704 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:40:56,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 04:40:56,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:40:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 04:40:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 04:40:56,706 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 04:40:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:40:56,933 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-03-20 04:40:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 04:40:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 87 [2022-03-20 04:40:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:40:56,934 INFO L225 Difference]: With dead ends: 58 [2022-03-20 04:40:56,934 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 04:40:56,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 04:40:56,935 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:40:56,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:40:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 04:40:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 04:40:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 04:40:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-03-20 04:40:56,938 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 87 [2022-03-20 04:40:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:40:56,938 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-03-20 04:40:56,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 04:40:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-03-20 04:40:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 04:40:56,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:40:56,939 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:40:56,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 04:40:57,151 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 [2022-03-20 04:40:57,151 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:40:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:40:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1593750620, now seen corresponding path program 11 times [2022-03-20 04:40:57,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:40:57,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968890888] [2022-03-20 04:40:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:40:57,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:40:57,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:40:57,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54372589] [2022-03-20 04:40:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:40:57,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:40:57,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:40:57,184 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) [2022-03-20 04:40:57,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 04:40:58,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 04:40:58,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:40:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 04:40:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:40:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 76 proven. 206 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 04:40:58,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:41:02,795 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* 13 c_main_~y~0 c_main_~y~0)) (.cse3 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 c_main_~k~0) (* .cse0 .cse0))) (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse1 .cse2 4 .cse3) 4))) (not (= 0 (mod (+ .cse1 .cse2 .cse3) 4))) (< (+ c_main_~c~0 1) c_main_~k~0) (not (< c_main_~c~0 c_main_~k~0)))) is different from false [2022-03-20 04:41:25,062 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 2 c_main_~y~0))) (+ (* 6 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 13))) 4) 0)) (not (< (+ 2 c_main_~c~0) c_main_~k~0)) (let ((.cse1 (+ 3 c_main_~y~0))) (= (* .cse1 c_main_~k~0) (* .cse1 .cse1))) (< (+ 3 c_main_~c~0) c_main_~k~0) (< (div (+ (* 14 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 73 c_main_~y~0 c_main_~y~0) (* 156 c_main_~y~0) 120 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) (+ (* 39 c_main_~y~0) 30 (* (* c_main_~y~0 c_main_~y~0 c_main_~y~0) 3) (* 18 (* c_main_~y~0 c_main_~y~0)) c_main_~x~0))) is different from false [2022-03-20 04:42:10,500 WARN L833 $PredicateComparison]: unable to prove that (or (let ((.cse0 (+ 2 c_main_~y~0))) (= (+ (* 3 c_main_~k~0) (* .cse0 c_main_~k~0)) (+ (* 6 c_main_~y~0) (* .cse0 .cse0) 21))) (< (div (+ (* 22 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 181 c_main_~y~0 c_main_~y~0) 852 (* 648 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) (+ 204 (* 36 (* c_main_~y~0 c_main_~y~0)) (div (+ (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (- 36) (* (- 10) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 37) c_main_~y~0 c_main_~y~0) (* (- 60) c_main_~y~0)) (- 4)) (* (* c_main_~y~0 c_main_~y~0 c_main_~y~0) 3) (* 147 c_main_~y~0))) (<= c_main_~k~0 (+ c_main_~c~0 4)) (< (+ 5 c_main_~c~0) c_main_~k~0)) is different from false [2022-03-20 04:42:33,656 WARN L833 $PredicateComparison]: unable to prove that (or (< (div (+ (* 337 c_main_~y~0 c_main_~y~0) (* 1668 c_main_~y~0) 3064 (* 30 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) (+ (* (* c_main_~y~0 c_main_~y~0) 54) (* 327 c_main_~y~0) (div (+ (* (- 121) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (- 400) (* (- 18) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 360) c_main_~y~0)) (- 4)) (* (* c_main_~y~0 c_main_~y~0 c_main_~y~0) 3) 666)) (< (+ 7 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ 6 c_main_~c~0)) (let ((.cse0 (+ 4 c_main_~y~0))) (= (+ (* .cse0 c_main_~k~0) (* 3 c_main_~k~0)) (+ (* 6 c_main_~y~0) (* .cse0 .cse0) 33)))) is different from false [2022-03-20 04:42:42,509 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ c_main_~c~0 8) c_main_~k~0) (<= c_main_~k~0 (+ 7 c_main_~c~0)) (< (div (+ (* 433 c_main_~y~0 c_main_~y~0) 5100 (* 34 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2436 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) (+ (* 63 (* c_main_~y~0 c_main_~y~0)) (* 444 c_main_~y~0) 1050 (* (* c_main_~y~0 c_main_~y~0 c_main_~y~0) 3) (div (+ (* (- 22) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (- 900) (* (- 181) c_main_~y~0 c_main_~y~0) (* (- 660) c_main_~y~0)) (- 4)))) (let ((.cse0 (+ 5 c_main_~y~0))) (= (+ (* 6 c_main_~y~0) (* .cse0 .cse0) 39) (+ (* .cse0 c_main_~k~0) (* 3 c_main_~k~0))))) is different from false [2022-03-20 04:43:16,215 WARN L833 $PredicateComparison]: unable to prove that (or (< (div (+ (* 42 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 4608 c_main_~y~0) 11992 (* 661 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) (+ (div (+ (* (- 1680) c_main_~y~0) (* (- 30) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 337) c_main_~y~0 c_main_~y~0) (- 3136)) (- 4)) (* 732 c_main_~y~0) (* (* c_main_~y~0 c_main_~y~0 c_main_~y~0) 3) 2214 (* 81 (* c_main_~y~0 c_main_~y~0)))) (forall ((main_~k~0 Int)) (or (= (+ (* 20 c_main_~y~0) 100 (* c_main_~y~0 c_main_~y~0)) (+ (* main_~k~0 c_main_~y~0) (* main_~k~0 10))) (<= main_~k~0 (+ 9 c_main_~c~0)) (< (+ c_main_~c~0 10) main_~k~0)))) is different from false [2022-03-20 04:43:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:19,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968890888] [2022-03-20 04:43:19,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:19,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54372589] [2022-03-20 04:43:19,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54372589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:19,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:19,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 04:43:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62999552] [2022-03-20 04:43:19,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:19,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 04:43:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 04:43:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=730, Unknown=14, NotChecked=366, Total=1260 [2022-03-20 04:43:19,760 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 04:43:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:20,136 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-03-20 04:43:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 04:43:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 94 [2022-03-20 04:43:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:20,138 INFO L225 Difference]: With dead ends: 61 [2022-03-20 04:43:20,138 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 04:43:20,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 78.4s TimeCoverageRelationStatistics Valid=171, Invalid=895, Unknown=14, NotChecked=402, Total=1482 [2022-03-20 04:43:20,139 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:20,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 555 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:43:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 04:43:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 04:43:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 04:43:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-03-20 04:43:20,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 94 [2022-03-20 04:43:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:20,143 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-03-20 04:43:20,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 04:43:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-03-20 04:43:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 04:43:20,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:20,144 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:20,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 04:43:20,351 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 [2022-03-20 04:43:20,351 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1832108019, now seen corresponding path program 12 times [2022-03-20 04:43:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654211670] [2022-03-20 04:43:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:20,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:20,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354773638] [2022-03-20 04:43:20,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:43:20,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:20,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:20,366 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) [2022-03-20 04:43:20,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 04:43:21,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 04:43:21,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 04:43:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 04:43:21,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:21,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654211670] [2022-03-20 04:43:21,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:21,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354773638] [2022-03-20 04:43:21,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354773638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:21,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:21,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 04:43:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190052137] [2022-03-20 04:43:21,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:21,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 04:43:21,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 04:43:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-20 04:43:21,609 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 04:43:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:21,872 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-03-20 04:43:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 04:43:21,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 101 [2022-03-20 04:43:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:21,873 INFO L225 Difference]: With dead ends: 64 [2022-03-20 04:43:21,874 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 04:43:21,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-20 04:43:21,874 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:21,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 657 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:43:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 04:43:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 04:43:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 17 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 04:43:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-03-20 04:43:21,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 101 [2022-03-20 04:43:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:21,896 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-03-20 04:43:21,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 04:43:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-03-20 04:43:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 04:43:21,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:21,897 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:21,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 04:43:22,097 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 [2022-03-20 04:43:22,098 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 74210108, now seen corresponding path program 13 times [2022-03-20 04:43:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:22,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612076090] [2022-03-20 04:43:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:22,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:22,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552554961] [2022-03-20 04:43:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:43:22,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:22,107 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) [2022-03-20 04:43:22,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 04:43:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:43:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 04:43:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 04:43:23,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:24,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612076090] [2022-03-20 04:43:24,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552554961] [2022-03-20 04:43:24,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552554961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:24,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:24,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 04:43:24,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016322414] [2022-03-20 04:43:24,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:24,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 04:43:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 04:43:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 04:43:24,431 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 04:43:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:24,714 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2022-03-20 04:43:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 04:43:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 108 [2022-03-20 04:43:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:24,718 INFO L225 Difference]: With dead ends: 67 [2022-03-20 04:43:24,719 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 04:43:24,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 04:43:24,719 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:24,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 732 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 04:43:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 04:43:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-20 04:43:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 04:43:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-20 04:43:24,737 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 108 [2022-03-20 04:43:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:24,738 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-20 04:43:24,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 04:43:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-20 04:43:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 04:43:24,742 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:24,742 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:24,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:24,948 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 [2022-03-20 04:43:24,948 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1356799277, now seen corresponding path program 14 times [2022-03-20 04:43:24,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:24,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210742892] [2022-03-20 04:43:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:24,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:24,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672721365] [2022-03-20 04:43:24,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:43:24,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:24,977 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) [2022-03-20 04:43:24,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 04:43:25,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:43:25,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 04:43:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 04:43:26,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210742892] [2022-03-20 04:43:26,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672721365] [2022-03-20 04:43:26,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672721365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:26,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:26,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 04:43:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396943498] [2022-03-20 04:43:26,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:26,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 04:43:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 04:43:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 04:43:26,271 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 04:43:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:26,611 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-03-20 04:43:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 04:43:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 115 [2022-03-20 04:43:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:26,612 INFO L225 Difference]: With dead ends: 70 [2022-03-20 04:43:26,612 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 04:43:26,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-20 04:43:26,613 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:26,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 811 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:43:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 04:43:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 04:43:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 19 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 04:43:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-03-20 04:43:26,618 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 115 [2022-03-20 04:43:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:26,619 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-03-20 04:43:26,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 04:43:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-03-20 04:43:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 04:43:26,620 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:26,620 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:26,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 04:43:26,830 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 [2022-03-20 04:43:26,830 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash 234650140, now seen corresponding path program 15 times [2022-03-20 04:43:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615203398] [2022-03-20 04:43:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:26,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:26,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:26,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167901520] [2022-03-20 04:43:26,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:43:26,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:26,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:26,839 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) [2022-03-20 04:43:26,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 04:43:27,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-20 04:43:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 04:43:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 04:43:28,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:29,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615203398] [2022-03-20 04:43:29,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167901520] [2022-03-20 04:43:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167901520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:29,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:29,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 04:43:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270181054] [2022-03-20 04:43:29,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:29,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 04:43:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 04:43:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 04:43:29,065 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 04:43:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:29,459 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-03-20 04:43:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 04:43:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 122 [2022-03-20 04:43:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:29,460 INFO L225 Difference]: With dead ends: 73 [2022-03-20 04:43:29,461 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 04:43:29,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 04:43:29,461 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:29,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 894 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 04:43:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 04:43:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 04:43:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 04:43:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-03-20 04:43:29,464 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 122 [2022-03-20 04:43:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:29,465 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-03-20 04:43:29,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 04:43:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-03-20 04:43:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 04:43:29,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:29,466 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:29,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:29,672 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 [2022-03-20 04:43:29,672 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1382514099, now seen corresponding path program 16 times [2022-03-20 04:43:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:29,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659168299] [2022-03-20 04:43:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:29,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196030325] [2022-03-20 04:43:29,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:43:29,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:29,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:29,682 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) [2022-03-20 04:43:29,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 04:43:30,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:43:30,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 04:43:30,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 04:43:30,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:31,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659168299] [2022-03-20 04:43:31,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196030325] [2022-03-20 04:43:31,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196030325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:31,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:31,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 04:43:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155527168] [2022-03-20 04:43:31,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:31,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 04:43:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 04:43:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-20 04:43:31,097 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 04:43:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:31,495 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-03-20 04:43:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 04:43:31,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 129 [2022-03-20 04:43:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:31,496 INFO L225 Difference]: With dead ends: 76 [2022-03-20 04:43:31,496 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 04:43:31,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-20 04:43:31,498 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:31,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 981 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 04:43:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 04:43:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 04:43:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 21 states have call successors, (21), 5 states have call predecessors, (21), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 04:43:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-03-20 04:43:31,503 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 129 [2022-03-20 04:43:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:31,503 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-03-20 04:43:31,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 04:43:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-03-20 04:43:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 04:43:31,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:31,505 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:31,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 04:43:31,710 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 [2022-03-20 04:43:31,710 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1912410364, now seen corresponding path program 17 times [2022-03-20 04:43:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:31,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970941570] [2022-03-20 04:43:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:31,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430273245] [2022-03-20 04:43:31,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:43:31,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:31,718 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) [2022-03-20 04:43:31,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 04:43:32,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-20 04:43:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 04:43:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 04:43:33,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:33,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970941570] [2022-03-20 04:43:33,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430273245] [2022-03-20 04:43:33,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430273245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:33,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:33,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 04:43:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816837215] [2022-03-20 04:43:33,581 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:33,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 04:43:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 04:43:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-20 04:43:33,582 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 04:43:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:34,076 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 04:43:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 04:43:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 136 [2022-03-20 04:43:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:34,077 INFO L225 Difference]: With dead ends: 79 [2022-03-20 04:43:34,077 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 04:43:34,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-20 04:43:34,077 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:34,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1072 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 04:43:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 04:43:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-20 04:43:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 04:43:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-03-20 04:43:34,080 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 136 [2022-03-20 04:43:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:34,080 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-03-20 04:43:34,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 04:43:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-03-20 04:43:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 04:43:34,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:34,081 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:34,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:34,289 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 [2022-03-20 04:43:34,289 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1628803219, now seen corresponding path program 18 times [2022-03-20 04:43:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:34,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011441604] [2022-03-20 04:43:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:34,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:34,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:34,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028886625] [2022-03-20 04:43:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:43:34,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:34,297 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) [2022-03-20 04:43:34,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 04:43:36,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 04:43:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:36,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 04:43:36,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 04:43:36,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:36,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:36,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011441604] [2022-03-20 04:43:36,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:36,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028886625] [2022-03-20 04:43:36,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028886625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:36,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:36,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 04:43:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295306633] [2022-03-20 04:43:36,866 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:36,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 04:43:36,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 04:43:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-20 04:43:36,867 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 04:43:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:37,370 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-03-20 04:43:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 04:43:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 143 [2022-03-20 04:43:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:37,371 INFO L225 Difference]: With dead ends: 82 [2022-03-20 04:43:37,371 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 04:43:37,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-20 04:43:37,372 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:37,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1167 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 04:43:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 04:43:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 04:43:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 23 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 04:43:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2022-03-20 04:43:37,374 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 143 [2022-03-20 04:43:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:37,374 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2022-03-20 04:43:37,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 04:43:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2022-03-20 04:43:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 04:43:37,375 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:37,376 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:37,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:37,576 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 [2022-03-20 04:43:37,576 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash 104603612, now seen corresponding path program 19 times [2022-03-20 04:43:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974373863] [2022-03-20 04:43:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:37,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011832045] [2022-03-20 04:43:37,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:43:37,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:37,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:37,584 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) [2022-03-20 04:43:37,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 04:43:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:43:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 04:43:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 04:43:38,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:38,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974373863] [2022-03-20 04:43:38,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011832045] [2022-03-20 04:43:38,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011832045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:38,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:38,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 04:43:38,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644539489] [2022-03-20 04:43:38,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:38,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 04:43:38,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 04:43:38,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-20 04:43:38,773 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 04:43:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:39,311 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-03-20 04:43:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 04:43:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 150 [2022-03-20 04:43:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:39,312 INFO L225 Difference]: With dead ends: 85 [2022-03-20 04:43:39,312 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 04:43:39,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-20 04:43:39,313 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:39,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1266 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 04:43:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 04:43:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 04:43:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 24 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 04:43:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-03-20 04:43:39,315 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 150 [2022-03-20 04:43:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:39,316 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-03-20 04:43:39,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 04:43:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-03-20 04:43:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 04:43:39,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:39,317 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:39,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:39,517 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 [2022-03-20 04:43:39,517 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:39,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -884546419, now seen corresponding path program 20 times [2022-03-20 04:43:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:39,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129085091] [2022-03-20 04:43:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:39,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493587223] [2022-03-20 04:43:39,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:43:39,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:39,525 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) [2022-03-20 04:43:39,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 04:43:40,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:43:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:40,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 04:43:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 04:43:40,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:40,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:40,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129085091] [2022-03-20 04:43:40,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:40,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493587223] [2022-03-20 04:43:40,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493587223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:40,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:40,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 04:43:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28026957] [2022-03-20 04:43:40,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:40,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 04:43:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 04:43:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-20 04:43:40,797 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 04:43:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:41,372 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-03-20 04:43:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 04:43:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 157 [2022-03-20 04:43:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:41,373 INFO L225 Difference]: With dead ends: 88 [2022-03-20 04:43:41,373 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 04:43:41,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-20 04:43:41,374 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:41,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1369 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 04:43:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 04:43:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 04:43:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 04:43:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2022-03-20 04:43:41,376 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 157 [2022-03-20 04:43:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:41,377 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2022-03-20 04:43:41,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 04:43:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2022-03-20 04:43:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-20 04:43:41,378 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:41,378 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:41,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:41,584 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 [2022-03-20 04:43:41,584 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1611114172, now seen corresponding path program 21 times [2022-03-20 04:43:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969905566] [2022-03-20 04:43:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:41,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:41,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:41,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49702857] [2022-03-20 04:43:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:43:41,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:41,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:41,593 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) [2022-03-20 04:43:41,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 04:43:43,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-20 04:43:43,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:43,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 04:43:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 04:43:43,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:43,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969905566] [2022-03-20 04:43:43,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49702857] [2022-03-20 04:43:43,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49702857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:43,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:43,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 04:43:43,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465289142] [2022-03-20 04:43:43,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:43,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 04:43:43,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 04:43:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-20 04:43:43,809 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 04:43:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:44,479 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-03-20 04:43:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 04:43:44,479 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 164 [2022-03-20 04:43:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:44,480 INFO L225 Difference]: With dead ends: 91 [2022-03-20 04:43:44,480 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 04:43:44,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-20 04:43:44,481 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:44,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1476 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 04:43:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 04:43:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 04:43:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 26 states have call successors, (26), 5 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 04:43:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-20 04:43:44,483 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 164 [2022-03-20 04:43:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:44,484 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-20 04:43:44,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 04:43:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-20 04:43:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 04:43:44,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:44,485 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:44,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:44,690 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 [2022-03-20 04:43:44,690 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1449139795, now seen corresponding path program 22 times [2022-03-20 04:43:44,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:44,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044418477] [2022-03-20 04:43:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:44,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:44,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620217450] [2022-03-20 04:43:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:43:44,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:44,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:44,698 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) [2022-03-20 04:43:44,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 04:43:46,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:43:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:46,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 04:43:46,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 04:43:47,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044418477] [2022-03-20 04:43:47,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:47,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620217450] [2022-03-20 04:43:47,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620217450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:47,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:47,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 04:43:47,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635840504] [2022-03-20 04:43:47,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:47,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 04:43:47,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 04:43:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-20 04:43:47,271 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 04:43:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:47,926 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2022-03-20 04:43:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 04:43:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 171 [2022-03-20 04:43:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:47,927 INFO L225 Difference]: With dead ends: 94 [2022-03-20 04:43:47,927 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 04:43:47,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 04:43:47,928 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:47,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1587 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 04:43:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 04:43:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 04:43:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 27 states have call successors, (27), 5 states have call predecessors, (27), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 04:43:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-03-20 04:43:47,931 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 171 [2022-03-20 04:43:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:47,931 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-03-20 04:43:47,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 04:43:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-03-20 04:43:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-20 04:43:47,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:47,932 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:47,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:48,139 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 [2022-03-20 04:43:48,140 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1272076900, now seen corresponding path program 23 times [2022-03-20 04:43:48,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:48,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026720227] [2022-03-20 04:43:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:48,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:48,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:48,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857658534] [2022-03-20 04:43:48,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:43:48,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:48,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:48,147 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) [2022-03-20 04:43:48,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 04:43:49,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-20 04:43:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 04:43:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-20 04:43:50,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:50,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026720227] [2022-03-20 04:43:50,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:50,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857658534] [2022-03-20 04:43:50,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857658534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:50,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:50,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-20 04:43:50,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537483926] [2022-03-20 04:43:50,669 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:50,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 04:43:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 04:43:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-20 04:43:50,670 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 04:43:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:51,425 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2022-03-20 04:43:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 04:43:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 178 [2022-03-20 04:43:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:51,426 INFO L225 Difference]: With dead ends: 97 [2022-03-20 04:43:51,426 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 04:43:51,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 04:43:51,427 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:51,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1702 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 04:43:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 04:43:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-20 04:43:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 28 states have call successors, (28), 5 states have call predecessors, (28), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 04:43:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 117 transitions. [2022-03-20 04:43:51,429 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 117 transitions. Word has length 178 [2022-03-20 04:43:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:51,430 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 117 transitions. [2022-03-20 04:43:51,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 04:43:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 117 transitions. [2022-03-20 04:43:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 04:43:51,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:51,431 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:51,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:51,631 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 [2022-03-20 04:43:51,631 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1587058995, now seen corresponding path program 24 times [2022-03-20 04:43:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:51,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904823467] [2022-03-20 04:43:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:51,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:51,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244133175] [2022-03-20 04:43:51,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:43:51,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:51,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:51,639 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) [2022-03-20 04:43:51,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 04:43:54,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 04:43:54,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:43:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 04:43:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-20 04:43:55,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:55,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904823467] [2022-03-20 04:43:55,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:55,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244133175] [2022-03-20 04:43:55,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244133175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:55,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:55,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-20 04:43:55,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26393607] [2022-03-20 04:43:55,647 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:55,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 04:43:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:55,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 04:43:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 04:43:55,648 INFO L87 Difference]: Start difference. First operand 94 states and 117 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 04:43:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:56,486 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2022-03-20 04:43:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 04:43:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 185 [2022-03-20 04:43:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:56,488 INFO L225 Difference]: With dead ends: 100 [2022-03-20 04:43:56,488 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 04:43:56,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 04:43:56,488 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:56,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1821 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 04:43:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 04:43:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 04:43:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 29 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 04:43:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2022-03-20 04:43:56,491 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 185 [2022-03-20 04:43:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:56,491 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2022-03-20 04:43:56,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 04:43:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2022-03-20 04:43:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-03-20 04:43:56,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:56,492 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:56,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:56,695 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 [2022-03-20 04:43:56,696 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1224991620, now seen corresponding path program 25 times [2022-03-20 04:43:56,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:56,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776264645] [2022-03-20 04:43:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:56,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:56,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:56,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619596158] [2022-03-20 04:43:56,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:43:56,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:56,704 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) [2022-03-20 04:43:56,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 04:43:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:43:57,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 04:43:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:43:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-20 04:43:58,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:43:58,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:43:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776264645] [2022-03-20 04:43:58,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:43:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619596158] [2022-03-20 04:43:58,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619596158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:43:58,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:43:58,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-20 04:43:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706802030] [2022-03-20 04:43:58,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:43:58,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 04:43:58,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:43:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 04:43:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 04:43:58,296 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 04:43:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:43:59,065 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2022-03-20 04:43:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 04:43:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 192 [2022-03-20 04:43:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:43:59,067 INFO L225 Difference]: With dead ends: 103 [2022-03-20 04:43:59,067 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 04:43:59,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 04:43:59,067 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 04:43:59,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1944 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 04:43:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 04:43:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 04:43:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 30 states have call successors, (30), 5 states have call predecessors, (30), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 04:43:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-03-20 04:43:59,070 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 192 [2022-03-20 04:43:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:43:59,070 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-03-20 04:43:59,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 04:43:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-03-20 04:43:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 04:43:59,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:43:59,071 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:43:59,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 04:43:59,279 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 [2022-03-20 04:43:59,279 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:43:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:43:59,279 INFO L85 PathProgramCache]: Analyzing trace with hash 714044397, now seen corresponding path program 26 times [2022-03-20 04:43:59,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:43:59,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369756006] [2022-03-20 04:43:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:43:59,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:43:59,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:43:59,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415057934] [2022-03-20 04:43:59,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:43:59,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:43:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:43:59,303 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) [2022-03-20 04:43:59,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 04:44:00,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:44:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:44:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-20 04:44:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:44:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-20 04:44:00,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:44:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:44:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369756006] [2022-03-20 04:44:01,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:44:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415057934] [2022-03-20 04:44:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415057934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:44:01,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:44:01,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-20 04:44:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730330706] [2022-03-20 04:44:01,221 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:44:01,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 04:44:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:44:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 04:44:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 04:44:01,222 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 04:44:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:44:02,118 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-20 04:44:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 04:44:02,118 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 199 [2022-03-20 04:44:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:44:02,119 INFO L225 Difference]: With dead ends: 106 [2022-03-20 04:44:02,119 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 04:44:02,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 04:44:02,120 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 04:44:02,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2071 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 04:44:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 04:44:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 04:44:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 31 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 04:44:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2022-03-20 04:44:02,123 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 199 [2022-03-20 04:44:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:44:02,123 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2022-03-20 04:44:02,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 04:44:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2022-03-20 04:44:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-03-20 04:44:02,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:44:02,124 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:44:02,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 04:44:02,330 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 [2022-03-20 04:44:02,330 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:44:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:44:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2084637532, now seen corresponding path program 27 times [2022-03-20 04:44:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:44:02,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033118898] [2022-03-20 04:44:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:44:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:44:02,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:44:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959585408] [2022-03-20 04:44:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:44:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:44:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:44:02,341 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) [2022-03-20 04:44:02,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 04:44:03,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 04:44:03,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:44:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 04:44:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:44:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-20 04:44:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:44:06,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:44:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033118898] [2022-03-20 04:44:06,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:44:06,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959585408] [2022-03-20 04:44:06,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959585408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:44:06,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:44:06,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-03-20 04:44:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631663745] [2022-03-20 04:44:06,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:44:06,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 04:44:06,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:44:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 04:44:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=2832, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 04:44:06,998 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 04:44:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:44:07,863 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2022-03-20 04:44:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 04:44:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 206 [2022-03-20 04:44:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:44:07,874 INFO L225 Difference]: With dead ends: 109 [2022-03-20 04:44:07,874 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 04:44:07,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=838, Invalid=3068, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 04:44:07,875 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 04:44:07,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2202 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 04:44:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 04:44:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-20 04:44:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 32 states have call successors, (32), 5 states have call predecessors, (32), 3 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 04:44:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2022-03-20 04:44:07,888 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 206 [2022-03-20 04:44:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:44:07,888 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2022-03-20 04:44:07,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 30 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 04:44:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2022-03-20 04:44:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 04:44:07,889 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:44:07,889 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:44:07,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 04:44:08,100 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 [2022-03-20 04:44:08,101 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:44:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:44:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash -309720819, now seen corresponding path program 28 times [2022-03-20 04:44:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:44:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334868034] [2022-03-20 04:44:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:44:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:44:08,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:44:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170612602] [2022-03-20 04:44:08,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:44:08,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:44:08,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:44:08,121 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) [2022-03-20 04:44:08,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 04:44:12,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:44:12,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:44:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-20 04:44:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:44:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-20 04:44:13,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:44:13,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:44:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334868034] [2022-03-20 04:44:13,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:44:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170612602] [2022-03-20 04:44:13,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170612602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:44:13,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:44:13,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-03-20 04:44:13,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354877345] [2022-03-20 04:44:13,486 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:44:13,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 04:44:13,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:44:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 04:44:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 04:44:13,487 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 04:44:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:44:14,545 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2022-03-20 04:44:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 04:44:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 213 [2022-03-20 04:44:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:44:14,546 INFO L225 Difference]: With dead ends: 112 [2022-03-20 04:44:14,546 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 04:44:14,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 04:44:14,547 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2337 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:44:14,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2337 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 04:44:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 04:44:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 04:44:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 33 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 04:44:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-03-20 04:44:14,549 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 213 [2022-03-20 04:44:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:44:14,550 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-03-20 04:44:14,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 04:44:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-03-20 04:44:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-03-20 04:44:14,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:44:14,551 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:44:14,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 04:44:14,751 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 [2022-03-20 04:44:14,751 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:44:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:44:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1464496700, now seen corresponding path program 29 times [2022-03-20 04:44:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:44:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300511008] [2022-03-20 04:44:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:44:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:44:14,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:44:14,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46213404] [2022-03-20 04:44:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:44:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:44:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:44:14,762 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) [2022-03-20 04:44:14,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 04:52:09,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-20 04:52:09,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:52:09,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 125 conjunts are in the unsatisfiable core [2022-03-20 04:52:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:52:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-20 04:52:10,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:52:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:52:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300511008] [2022-03-20 04:52:13,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:52:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46213404] [2022-03-20 04:52:13,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46213404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:52:13,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:52:13,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-03-20 04:52:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314967326] [2022-03-20 04:52:13,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:52:13,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 04:52:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:52:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 04:52:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=2929, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 04:52:13,329 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 04:52:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:52:14,266 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2022-03-20 04:52:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 04:52:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 220 [2022-03-20 04:52:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:52:14,276 INFO L225 Difference]: With dead ends: 115 [2022-03-20 04:52:14,276 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 04:52:14,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=863, Invalid=3169, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 04:52:14,277 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 2373 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 04:52:14,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2476 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 04:52:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 04:52:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-20 04:52:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 34 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 04:52:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 141 transitions. [2022-03-20 04:52:14,288 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 141 transitions. Word has length 220 [2022-03-20 04:52:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:52:14,289 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 141 transitions. [2022-03-20 04:52:14,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 32 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 04:52:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 141 transitions. [2022-03-20 04:52:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-20 04:52:14,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:52:14,290 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:52:14,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 04:52:14,515 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 [2022-03-20 04:52:14,516 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:52:14,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:52:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash -481745363, now seen corresponding path program 30 times [2022-03-20 04:52:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:52:14,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164391633] [2022-03-20 04:52:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:52:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:52:14,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:52:14,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317719509] [2022-03-20 04:52:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:52:14,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:52:14,528 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:52:14,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 04:52:24,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 04:52:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:52:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-20 04:52:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:52:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 04:52:25,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:52:29,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:52:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164391633] [2022-03-20 04:52:29,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:52:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317719509] [2022-03-20 04:52:29,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317719509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:52:29,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:52:29,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-03-20 04:52:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16857272] [2022-03-20 04:52:29,043 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:52:29,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 04:52:29,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:52:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 04:52:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 04:52:29,045 INFO L87 Difference]: Start difference. First operand 112 states and 141 transitions. Second operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 04:52:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:52:30,367 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-20 04:52:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 04:52:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 227 [2022-03-20 04:52:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:52:30,368 INFO L225 Difference]: With dead ends: 118 [2022-03-20 04:52:30,368 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 04:52:30,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 04:52:30,370 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:52:30,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2619 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 04:52:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 04:52:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 04:52:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 35 states have call successors, (35), 5 states have call predecessors, (35), 3 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 04:52:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2022-03-20 04:52:30,372 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 227 [2022-03-20 04:52:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:52:30,373 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2022-03-20 04:52:30,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 04:52:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2022-03-20 04:52:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-03-20 04:52:30,374 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:52:30,374 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:52:30,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 04:52:30,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:30,590 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:52:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:52:30,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1159311076, now seen corresponding path program 31 times [2022-03-20 04:52:30,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:52:30,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500592290] [2022-03-20 04:52:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:52:30,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:52:30,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:52:30,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148604422] [2022-03-20 04:52:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:52:30,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:52:30,606 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:52:30,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 04:52:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:52:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-20 04:52:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:52:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-20 04:52:32,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:52:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:52:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500592290] [2022-03-20 04:52:32,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:52:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148604422] [2022-03-20 04:52:32,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148604422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:52:32,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:52:32,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-03-20 04:52:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100244996] [2022-03-20 04:52:32,588 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:52:32,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 04:52:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:52:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 04:52:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 04:52:32,589 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 04:52:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:52:33,757 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-20 04:52:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 04:52:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 234 [2022-03-20 04:52:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:52:33,758 INFO L225 Difference]: With dead ends: 121 [2022-03-20 04:52:33,758 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 04:52:33,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 04:52:33,759 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2657 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:52:33,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2766 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 04:52:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 04:52:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-20 04:52:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 36 states have call successors, (36), 5 states have call predecessors, (36), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 04:52:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2022-03-20 04:52:33,762 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 234 [2022-03-20 04:52:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:52:33,762 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2022-03-20 04:52:33,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 34 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 04:52:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2022-03-20 04:52:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-03-20 04:52:33,763 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:52:33,763 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:52:33,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 04:52:33,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 04:52:33,970 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:52:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:52:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1967049549, now seen corresponding path program 32 times [2022-03-20 04:52:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:52:33,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541027299] [2022-03-20 04:52:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:52:33,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:52:33,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:52:33,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73600635] [2022-03-20 04:52:33,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:52:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:52:33,979 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:52:33,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 04:52:34,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:52:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:52:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 136 conjunts are in the unsatisfiable core [2022-03-20 04:52:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:52:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-20 04:52:35,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:52:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:52:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541027299] [2022-03-20 04:52:36,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:52:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73600635] [2022-03-20 04:52:36,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73600635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:52:36,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:52:36,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-20 04:52:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555417569] [2022-03-20 04:52:36,277 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:52:36,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 04:52:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:52:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 04:52:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 04:52:36,278 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 04:52:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:52:37,622 INFO L93 Difference]: Finished difference Result 124 states and 156 transitions. [2022-03-20 04:52:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 04:52:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 241 [2022-03-20 04:52:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:52:37,623 INFO L225 Difference]: With dead ends: 124 [2022-03-20 04:52:37,623 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 04:52:37,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 04:52:37,624 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2917 SdHoareTripleChecker+Invalid, 2421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:52:37,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2917 Invalid, 2421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 04:52:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 04:52:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 04:52:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 37 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 04:52:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-03-20 04:52:37,627 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 241 [2022-03-20 04:52:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:52:37,627 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-03-20 04:52:37,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 04:52:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-03-20 04:52:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-20 04:52:37,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:52:37,628 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:52:37,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 04:52:37,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 04:52:37,835 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:52:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:52:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash 425895932, now seen corresponding path program 33 times [2022-03-20 04:52:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:52:37,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273056112] [2022-03-20 04:52:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:52:37,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:52:37,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:52:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467048000] [2022-03-20 04:52:37,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:52:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:52:37,846 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:52:37,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 04:52:46,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-20 04:52:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:52:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-20 04:52:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:52:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-20 04:52:47,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:52:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:52:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273056112] [2022-03-20 04:52:47,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:52:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467048000] [2022-03-20 04:52:47,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467048000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:52:47,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:52:47,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-20 04:52:47,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995912342] [2022-03-20 04:52:47,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:52:47,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 04:52:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:52:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 04:52:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 04:52:47,506 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 04:52:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:52:48,638 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2022-03-20 04:52:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 04:52:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 248 [2022-03-20 04:52:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:52:48,639 INFO L225 Difference]: With dead ends: 127 [2022-03-20 04:52:48,639 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 04:52:48,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 04:52:48,640 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:52:48,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3072 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 04:52:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 04:52:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-20 04:52:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 38 states have call successors, (38), 5 states have call predecessors, (38), 3 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 04:52:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-03-20 04:52:48,645 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 248 [2022-03-20 04:52:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:52:48,645 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-03-20 04:52:48,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 36 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 04:52:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-03-20 04:52:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-03-20 04:52:48,647 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:52:48,647 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:52:48,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 04:52:48,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 04:52:48,857 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:52:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:52:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1654851475, now seen corresponding path program 34 times [2022-03-20 04:52:48,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:52:48,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637297612] [2022-03-20 04:52:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:52:48,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:52:48,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:52:48,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783682732] [2022-03-20 04:52:48,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:52:48,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:52:48,865 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:52:48,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 04:52:56,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:52:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:52:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-20 04:52:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:52:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-20 04:52:57,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:52:58,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:52:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637297612] [2022-03-20 04:52:58,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:52:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783682732] [2022-03-20 04:52:58,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783682732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:52:58,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:52:58,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-03-20 04:52:58,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318872040] [2022-03-20 04:52:58,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:52:58,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 04:52:58,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:52:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 04:52:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 04:52:58,249 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 04:52:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:52:59,767 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-20 04:52:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 04:52:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 255 [2022-03-20 04:52:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:52:59,768 INFO L225 Difference]: With dead ends: 130 [2022-03-20 04:52:59,768 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 04:52:59,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 04:52:59,768 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 04:52:59,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3231 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 04:52:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 04:52:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 04:52:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 39 states have call successors, (39), 5 states have call predecessors, (39), 3 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 04:52:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2022-03-20 04:52:59,771 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 255 [2022-03-20 04:52:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:52:59,772 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2022-03-20 04:52:59,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 37 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 04:52:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2022-03-20 04:52:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-03-20 04:52:59,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:52:59,773 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:52:59,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 04:52:59,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:59,983 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:52:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:52:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash -997361956, now seen corresponding path program 35 times [2022-03-20 04:52:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:52:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821092731] [2022-03-20 04:52:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:52:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:52:59,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:52:59,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986729521] [2022-03-20 04:52:59,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:52:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:52:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:52:59,994 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:52:59,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 04:53:59,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-03-20 04:53:59,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:53:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-20 04:53:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:54:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-20 04:54:00,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:54:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:54:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821092731] [2022-03-20 04:54:01,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:54:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986729521] [2022-03-20 04:54:01,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986729521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:54:01,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:54:01,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-20 04:54:01,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118801603] [2022-03-20 04:54:01,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:54:01,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 04:54:01,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:54:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 04:54:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 04:54:01,130 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 04:54:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:54:02,499 INFO L93 Difference]: Finished difference Result 133 states and 168 transitions. [2022-03-20 04:54:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 04:54:02,500 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 262 [2022-03-20 04:54:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:54:02,500 INFO L225 Difference]: With dead ends: 133 [2022-03-20 04:54:02,501 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 04:54:02,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 04:54:02,501 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3273 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 04:54:02,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3394 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 04:54:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 04:54:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-20 04:54:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 40 states have call successors, (40), 5 states have call predecessors, (40), 3 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 04:54:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2022-03-20 04:54:02,504 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 262 [2022-03-20 04:54:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:54:02,504 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2022-03-20 04:54:02,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 38 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 04:54:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2022-03-20 04:54:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-03-20 04:54:02,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:54:02,505 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:54:02,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 04:54:02,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 04:54:02,716 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:54:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:54:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 102083981, now seen corresponding path program 36 times [2022-03-20 04:54:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:54:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095413940] [2022-03-20 04:54:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:54:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:54:02,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:54:02,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764814786] [2022-03-20 04:54:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:54:02,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:54:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:54:02,724 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:54:02,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 04:54:11,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 04:54:11,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:54:11,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 152 conjunts are in the unsatisfiable core [2022-03-20 04:54:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:54:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-20 04:54:12,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:54:12,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:54:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095413940] [2022-03-20 04:54:12,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:54:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764814786] [2022-03-20 04:54:12,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764814786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:54:12,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:54:12,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-20 04:54:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827444138] [2022-03-20 04:54:12,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:54:12,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 04:54:12,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:54:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 04:54:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 04:54:12,493 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 04:54:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:54:14,086 INFO L93 Difference]: Finished difference Result 136 states and 172 transitions. [2022-03-20 04:54:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 04:54:14,086 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 269 [2022-03-20 04:54:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:54:14,087 INFO L225 Difference]: With dead ends: 136 [2022-03-20 04:54:14,087 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 04:54:14,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 04:54:14,088 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 04:54:14,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3561 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 04:54:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 04:54:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 04:54:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 41 states have call successors, (41), 5 states have call predecessors, (41), 3 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 04:54:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 169 transitions. [2022-03-20 04:54:14,091 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 169 transitions. Word has length 269 [2022-03-20 04:54:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:54:14,091 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 169 transitions. [2022-03-20 04:54:14,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 39 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 04:54:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 169 transitions. [2022-03-20 04:54:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-03-20 04:54:14,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:54:14,100 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:54:14,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 04:54:14,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 04:54:14,307 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:54:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:54:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash -843792964, now seen corresponding path program 37 times [2022-03-20 04:54:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:54:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509875575] [2022-03-20 04:54:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:54:14,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:54:14,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:54:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228564442] [2022-03-20 04:54:14,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:54:14,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:54:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:54:14,317 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:54:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 04:54:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:54:15,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 156 conjunts are in the unsatisfiable core [2022-03-20 04:54:15,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:54:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-20 04:54:16,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:54:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:54:17,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509875575] [2022-03-20 04:54:17,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:54:17,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228564442] [2022-03-20 04:54:17,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228564442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:54:17,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:54:17,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-03-20 04:54:17,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023701175] [2022-03-20 04:54:17,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:54:17,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 04:54:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:54:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 04:54:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 04:54:17,255 INFO L87 Difference]: Start difference. First operand 133 states and 169 transitions. Second operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 04:54:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:54:18,684 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2022-03-20 04:54:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 04:54:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Word has length 276 [2022-03-20 04:54:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:54:18,685 INFO L225 Difference]: With dead ends: 139 [2022-03-20 04:54:18,685 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 04:54:18,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 04:54:18,686 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3605 mSDsCounter, 0 mSdLazyCounter, 3166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3732 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 04:54:18,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3732 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3166 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 04:54:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 04:54:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-20 04:54:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 42 states have call successors, (42), 5 states have call predecessors, (42), 3 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 04:54:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2022-03-20 04:54:18,688 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 276 [2022-03-20 04:54:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:54:18,689 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2022-03-20 04:54:18,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 40 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 04:54:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2022-03-20 04:54:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-03-20 04:54:18,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:54:18,690 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:54:18,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 04:54:18,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 04:54:18,898 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:54:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:54:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash 710601389, now seen corresponding path program 38 times [2022-03-20 04:54:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:54:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248775189] [2022-03-20 04:54:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:54:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:54:18,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:54:18,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579436935] [2022-03-20 04:54:18,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:54:18,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:54:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:54:18,907 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:54:18,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 04:54:20,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:54:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:54:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-20 04:54:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:54:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-03-20 04:54:21,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:54:21,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:54:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248775189] [2022-03-20 04:54:21,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:54:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579436935] [2022-03-20 04:54:21,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579436935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:54:21,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:54:21,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-03-20 04:54:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47613604] [2022-03-20 04:54:21,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:54:21,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 04:54:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:54:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 04:54:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 04:54:21,784 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 04:54:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:54:23,270 INFO L93 Difference]: Finished difference Result 142 states and 180 transitions. [2022-03-20 04:54:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 04:54:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 283 [2022-03-20 04:54:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:54:23,272 INFO L225 Difference]: With dead ends: 142 [2022-03-20 04:54:23,272 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 04:54:23,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 04:54:23,272 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 3327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3907 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 04:54:23,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3907 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3327 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 04:54:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 04:54:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 04:54:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 43 states have call successors, (43), 5 states have call predecessors, (43), 3 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 04:54:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2022-03-20 04:54:23,275 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 283 [2022-03-20 04:54:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:54:23,276 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2022-03-20 04:54:23,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 41 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 04:54:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2022-03-20 04:54:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-03-20 04:54:23,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:54:23,277 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:54:23,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 04:54:23,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 04:54:23,485 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:54:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:54:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash -442073956, now seen corresponding path program 39 times [2022-03-20 04:54:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:54:23,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846482018] [2022-03-20 04:54:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:54:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:54:23,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:54:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355750556] [2022-03-20 04:54:23,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:54:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:54:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:54:23,494 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:54:23,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 04:54:50,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-03-20 04:54:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:54:50,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 164 conjunts are in the unsatisfiable core [2022-03-20 04:54:50,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:54:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 80 proven. 2340 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2022-03-20 04:54:51,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:54:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:54:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846482018] [2022-03-20 04:54:52,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:54:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355750556] [2022-03-20 04:54:52,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355750556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:54:52,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:54:52,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2022-03-20 04:54:52,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666781739] [2022-03-20 04:54:52,196 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:54:52,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 04:54:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:54:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 04:54:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 04:54:52,197 INFO L87 Difference]: Start difference. First operand 139 states and 177 transitions. Second operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 42 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 04:54:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:54:53,994 INFO L93 Difference]: Finished difference Result 145 states and 184 transitions. [2022-03-20 04:54:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 04:54:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 42 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Word has length 290 [2022-03-20 04:54:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:54:53,995 INFO L225 Difference]: With dead ends: 145 [2022-03-20 04:54:53,995 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 04:54:53,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 04:54:53,996 INFO L913 BasicCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4086 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 04:54:53,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4086 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3492 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 04:54:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 04:54:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-20 04:54:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 44 states have call successors, (44), 5 states have call predecessors, (44), 3 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 04:54:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 181 transitions. [2022-03-20 04:54:53,999 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 181 transitions. Word has length 290 [2022-03-20 04:54:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:54:53,999 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 181 transitions. [2022-03-20 04:54:53,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 42 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 04:54:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 181 transitions. [2022-03-20 04:54:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-03-20 04:54:54,000 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:54:54,000 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:54:54,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 04:54:54,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:54:54,216 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:54:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:54:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1973333965, now seen corresponding path program 40 times [2022-03-20 04:54:54,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:54:54,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352780530] [2022-03-20 04:54:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:54:54,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:54:54,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:54:54,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286367524] [2022-03-20 04:54:54,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:54:54,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:54:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:54:54,226 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:54:54,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 04:55:01,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:55:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:55:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 168 conjunts are in the unsatisfiable core [2022-03-20 04:55:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:55:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5822 backedges. 82 proven. 2460 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-03-20 04:55:02,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:55:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:55:02,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352780530] [2022-03-20 04:55:02,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:55:02,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286367524] [2022-03-20 04:55:02,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286367524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:55:02,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 04:55:02,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-03-20 04:55:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775317068] [2022-03-20 04:55:02,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 04:55:02,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 04:55:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:55:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 04:55:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 04:55:02,887 INFO L87 Difference]: Start difference. First operand 142 states and 181 transitions. Second operand has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 04:55:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:55:04,794 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2022-03-20 04:55:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 04:55:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Word has length 297 [2022-03-20 04:55:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:55:04,796 INFO L225 Difference]: With dead ends: 148 [2022-03-20 04:55:04,796 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 04:55:04,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 04:55:04,796 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 4133 mSDsCounter, 0 mSdLazyCounter, 3661 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4269 SdHoareTripleChecker+Invalid, 3661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 04:55:04,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4269 Invalid, 3661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3661 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 04:55:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 04:55:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 04:55:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 45 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 04:55:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 185 transitions. [2022-03-20 04:55:04,799 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 185 transitions. Word has length 297 [2022-03-20 04:55:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:55:04,799 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 185 transitions. [2022-03-20 04:55:04,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 43 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 04:55:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 185 transitions. [2022-03-20 04:55:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-03-20 04:55:04,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:55:04,800 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:55:04,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 04:55:05,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:55:05,008 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:55:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:55:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1018213244, now seen corresponding path program 41 times [2022-03-20 04:55:05,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:55:05,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786879649] [2022-03-20 04:55:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:55:05,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:55:05,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:55:05,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313814427] [2022-03-20 04:55:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:55:05,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:55:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:55:05,032 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:55:05,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process