/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:37:51,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:37:51,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:37:51,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 19:37:51,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 19:37:51,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 19:37:51,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 19:37:51,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 19:37:51,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 19:37:51,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 19:37:51,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 19:37:51,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 19:37:51,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 19:37:51,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 19:37:51,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 19:37:51,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 19:37:51,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 19:37:51,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 19:37:51,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 19:37:51,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 19:37:51,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 19:37:51,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 19:37:51,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 19:37:51,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 19:37:51,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 19:37:51,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 19:37:51,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 19:37:51,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 19:37:51,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 19:37:51,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 19:37:51,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 19:37:51,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 19:37:51,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 19:37:51,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 19:37:51,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 19:37:51,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 19:37:51,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 19:37:51,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 19:37:51,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:37:51,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:37:51,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:37:51,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:37:51,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:37:51,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:37:51,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:37:51,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:37:51,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:37:51,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:37:51,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:37:51,172 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:37:51,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:37:51,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:37:51,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:37:51,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:37:51,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:37:51,354 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:37:51,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c [2022-02-23 19:37:51,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f13f0525/30954ef274f6427c8a8c704a3c2c41a1/FLAGe17dc87d2 [2022-02-23 19:37:51,703 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:37:51,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c [2022-02-23 19:37:51,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f13f0525/30954ef274f6427c8a8c704a3c2c41a1/FLAGe17dc87d2 [2022-02-23 19:37:52,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f13f0525/30954ef274f6427c8a8c704a3c2c41a1 [2022-02-23 19:37:52,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:37:52,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:37:52,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:37:52,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:37:52,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:37:52,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@483202a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52, skipping insertion in model container [2022-02-23 19:37:52,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:37:52,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:37:52,272 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c[458,471] [2022-02-23 19:37:52,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:37:52,286 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:37:52,295 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c[458,471] [2022-02-23 19:37:52,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:37:52,311 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:37:52,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52 WrapperNode [2022-02-23 19:37:52,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:37:52,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:37:52,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:37:52,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:37:52,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:37:52,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:37:52,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:37:52,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:37:52,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:37:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:52,356 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) [2022-02-23 19:37:52,365 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 [2022-02-23 19:37:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:37:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:37:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:37:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 19:37:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 19:37:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:37:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:37:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:37:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:37:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:37:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:37:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:37:52,442 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:37:52,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:37:52,536 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:37:52,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:37:52,540 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:37:52,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:37:52 BoogieIcfgContainer [2022-02-23 19:37:52,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:37:52,542 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:37:52,542 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:37:52,556 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:37:52,558 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:37:52" (1/1) ... [2022-02-23 19:37:52,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:37:52 BasicIcfg [2022-02-23 19:37:52,570 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:37:52,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:37:52,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:37:52,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:37:52,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:37:52" (1/4) ... [2022-02-23 19:37:52,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4c7482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:37:52, skipping insertion in model container [2022-02-23 19:37:52,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:37:52" (2/4) ... [2022-02-23 19:37:52,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4c7482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:37:52, skipping insertion in model container [2022-02-23 19:37:52,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:37:52" (3/4) ... [2022-02-23 19:37:52,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4c7482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:37:52, skipping insertion in model container [2022-02-23 19:37:52,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:37:52" (4/4) ... [2022-02-23 19:37:52,593 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound20.cJordan [2022-02-23 19:37:52,596 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:37:52,596 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:37:52,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:37:52,651 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 19:37:52,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:37:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:37:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 19:37:52,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:52,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:52,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-02-23 19:37:52,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:52,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400044743] [2022-02-23 19:37:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:52,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:37:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:52,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 19:37:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:52,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 19:37:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:37:52,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:52,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400044743] [2022-02-23 19:37:52,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400044743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:37:52,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:37:52,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 19:37:52,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187329895] [2022-02-23 19:37:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:37:52,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 19:37:52,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 19:37:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:37:52,893 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:37:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:52,942 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-02-23 19:37:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 19:37:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 19:37:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:52,952 INFO L225 Difference]: With dead ends: 29 [2022-02-23 19:37:52,952 INFO L226 Difference]: Without dead ends: 24 [2022-02-23 19:37:52,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:37:52,956 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:52,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:37:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-23 19:37:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-23 19:37:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:37:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-23 19:37:52,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-02-23 19:37:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:52,984 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-23 19:37:52,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:37:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-23 19:37:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 19:37:52,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:52,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:52,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:37:52,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:52,997 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-02-23 19:37:52,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:52,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696317007] [2022-02-23 19:37:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:52,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:53,022 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:53,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508881483] [2022-02-23 19:37:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:53,026 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) [2022-02-23 19:37:53,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 19:37:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:37:53,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:37:53,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:37:53,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:53,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696317007] [2022-02-23 19:37:53,179 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:53,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508881483] [2022-02-23 19:37:53,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508881483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:37:53,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:37:53,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:37:53,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467008901] [2022-02-23 19:37:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:37:53,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:37:53,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:37:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:37:53,185 INFO L87 Difference]: Start difference. First operand 24 states and 27 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 19:37:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:53,229 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-02-23 19:37:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:37:53,230 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-02-23 19:37:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:53,232 INFO L225 Difference]: With dead ends: 33 [2022-02-23 19:37:53,233 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 19:37:53,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:37:53,238 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:53,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:37:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 19:37:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-23 19:37:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:37:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-23 19:37:53,248 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-02-23 19:37:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:53,249 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-23 19:37:53,249 INFO L471 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 19:37:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-23 19:37:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:37:53,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:53,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:53,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:53,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:53,460 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-02-23 19:37:53,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:53,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374529109] [2022-02-23 19:37:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:53,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:53,469 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:53,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456027584] [2022-02-23 19:37:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:53,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:53,480 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) [2022-02-23 19:37:53,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 19:37:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 19:37:53,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:37:53,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-23 19:37:53,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:53,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374529109] [2022-02-23 19:37:53,816 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:53,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456027584] [2022-02-23 19:37:53,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456027584] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:53,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:53,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 19:37:53,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787730706] [2022-02-23 19:37:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:37:53,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:37:53,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:37:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 19:37:53,818 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 19:37:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:53,860 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-02-23 19:37:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:37:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-23 19:37:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:53,863 INFO L225 Difference]: With dead ends: 35 [2022-02-23 19:37:53,863 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 19:37:53,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:37:53,865 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:53,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:37:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 19:37:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 19:37:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:37:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-02-23 19:37:53,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-02-23 19:37:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:53,875 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-02-23 19:37:53,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 19:37:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-02-23 19:37:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 19:37:53,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:53,876 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:53,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:54,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 19:37:54,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-02-23 19:37:54,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:54,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316855129] [2022-02-23 19:37:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:54,095 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:54,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679744648] [2022-02-23 19:37:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:54,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:54,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:54,097 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) [2022-02-23 19:37:54,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 19:37:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:37:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 19:37:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 19:37:54,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:54,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:54,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316855129] [2022-02-23 19:37:54,613 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:54,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679744648] [2022-02-23 19:37:54,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679744648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:54,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:54,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 19:37:54,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834626492] [2022-02-23 19:37:54,613 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:37:54,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 19:37:54,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 19:37:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 19:37:54,614 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-23 19:37:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:54,664 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-02-23 19:37:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 19:37:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-02-23 19:37:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:54,665 INFO L225 Difference]: With dead ends: 40 [2022-02-23 19:37:54,665 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 19:37:54,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:37:54,665 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:54,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:37:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 19:37:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-23 19:37:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:37:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-02-23 19:37:54,669 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-02-23 19:37:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:54,669 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-02-23 19:37:54,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-23 19:37:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-23 19:37:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 19:37:54,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:54,670 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:54,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:54,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:54,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-02-23 19:37:54,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:54,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375371704] [2022-02-23 19:37:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:54,895 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:54,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595665191] [2022-02-23 19:37:54,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:37:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:54,902 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) [2022-02-23 19:37:54,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 19:37:55,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:37:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:37:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 19:37:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 19:37:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:55,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:55,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375371704] [2022-02-23 19:37:55,382 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:55,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595665191] [2022-02-23 19:37:55,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595665191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:55,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:55,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 19:37:55,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537015066] [2022-02-23 19:37:55,383 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:37:55,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:37:55,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:37:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:37:55,384 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-23 19:37:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:55,440 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-02-23 19:37:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 19:37:55,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-02-23 19:37:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:55,441 INFO L225 Difference]: With dead ends: 43 [2022-02-23 19:37:55,441 INFO L226 Difference]: Without dead ends: 39 [2022-02-23 19:37:55,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:37:55,442 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:55,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:37:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-23 19:37:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-23 19:37:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:37:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-02-23 19:37:55,445 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-02-23 19:37:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:55,445 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-02-23 19:37:55,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-23 19:37:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-02-23 19:37:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 19:37:55,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:55,446 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:55,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:55,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:55,651 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-02-23 19:37:55,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:55,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491301856] [2022-02-23 19:37:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:55,660 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:55,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899243211] [2022-02-23 19:37:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:37:55,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:55,663 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) [2022-02-23 19:37:55,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 19:37:55,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 19:37:55,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:37:55,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 19:37:55,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-02-23 19:37:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:56,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:56,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491301856] [2022-02-23 19:37:56,175 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:56,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899243211] [2022-02-23 19:37:56,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899243211] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:56,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:56,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 19:37:56,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598623363] [2022-02-23 19:37:56,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:37:56,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 19:37:56,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 19:37:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:37:56,176 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-02-23 19:37:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:56,241 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-02-23 19:37:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 19:37:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-02-23 19:37:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:56,242 INFO L225 Difference]: With dead ends: 46 [2022-02-23 19:37:56,242 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 19:37:56,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:37:56,242 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:56,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:37:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 19:37:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-23 19:37:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 19:37:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-02-23 19:37:56,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-02-23 19:37:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:56,246 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-02-23 19:37:56,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-02-23 19:37:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-02-23 19:37:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 19:37:56,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:56,247 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:56,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:56,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:56,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-02-23 19:37:56,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:56,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494392610] [2022-02-23 19:37:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:56,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:56,463 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:56,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209575867] [2022-02-23 19:37:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 19:37:56,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:56,478 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) [2022-02-23 19:37:56,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 19:37:56,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 19:37:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:37:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 19:37:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:37:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 19:37:56,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:37:56,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:37:56,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494392610] [2022-02-23 19:37:56,771 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:37:56,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209575867] [2022-02-23 19:37:56,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209575867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:37:56,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:37:56,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 19:37:56,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110280671] [2022-02-23 19:37:56,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:37:56,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 19:37:56,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:37:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 19:37:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:37:56,772 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-02-23 19:37:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:37:56,857 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-02-23 19:37:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 19:37:56,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-02-23 19:37:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:37:56,858 INFO L225 Difference]: With dead ends: 49 [2022-02-23 19:37:56,858 INFO L226 Difference]: Without dead ends: 45 [2022-02-23 19:37:56,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-23 19:37:56,859 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:37:56,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:37:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-23 19:37:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-23 19:37:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 19:37:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-02-23 19:37:56,863 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-02-23 19:37:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:37:56,863 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-02-23 19:37:56,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-02-23 19:37:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-02-23 19:37:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-23 19:37:56,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:37:56,864 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:37:56,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 19:37:57,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:57,073 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:37:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:37:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-02-23 19:37:57,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:37:57,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057083847] [2022-02-23 19:37:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:37:57,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:37:57,081 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:37:57,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642270944] [2022-02-23 19:37:57,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 19:37:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:37:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:37:57,082 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) [2022-02-23 19:37:57,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 19:38:11,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-23 19:38:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:38:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-23 19:38:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:38:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 19:38:12,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:38:12,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:38:12,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057083847] [2022-02-23 19:38:12,223 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:38:12,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642270944] [2022-02-23 19:38:12,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642270944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:38:12,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:38:12,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 19:38:12,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765197053] [2022-02-23 19:38:12,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:38:12,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 19:38:12,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:38:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 19:38:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:38:12,225 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-02-23 19:38:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:38:12,329 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-02-23 19:38:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 19:38:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-02-23 19:38:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:38:12,331 INFO L225 Difference]: With dead ends: 52 [2022-02-23 19:38:12,331 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 19:38:12,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-23 19:38:12,331 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:38:12,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:38:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 19:38:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-23 19:38:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:38:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-02-23 19:38:12,335 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-02-23 19:38:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:38:12,335 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-02-23 19:38:12,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-02-23 19:38:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-02-23 19:38:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 19:38:12,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:38:12,336 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:38:12,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 19:38:12,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:38:12,547 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:38:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:38:12,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-02-23 19:38:12,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:38:12,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188112648] [2022-02-23 19:38:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:38:12,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:38:12,559 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:38:12,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628821883] [2022-02-23 19:38:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 19:38:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:38:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:38:12,561 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) [2022-02-23 19:38:12,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 19:38:24,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-23 19:38:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:38:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-23 19:38:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:38:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 19:38:25,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:38:25,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:38:25,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188112648] [2022-02-23 19:38:25,350 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:38:25,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628821883] [2022-02-23 19:38:25,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628821883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:38:25,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:38:25,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-23 19:38:25,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236293816] [2022-02-23 19:38:25,351 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:38:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 19:38:25,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:38:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 19:38:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-23 19:38:25,351 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-23 19:38:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:38:25,464 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-02-23 19:38:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 19:38:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-02-23 19:38:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:38:25,465 INFO L225 Difference]: With dead ends: 55 [2022-02-23 19:38:25,465 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 19:38:25,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-23 19:38:25,465 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:38:25,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:38:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 19:38:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-23 19:38:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 19:38:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-02-23 19:38:25,469 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-02-23 19:38:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:38:25,469 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-02-23 19:38:25,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-23 19:38:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-02-23 19:38:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-23 19:38:25,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:38:25,470 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:38:25,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 19:38:25,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 19:38:25,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:38:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:38:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2022-02-23 19:38:25,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:38:25,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846510345] [2022-02-23 19:38:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:38:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:38:25,678 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:38:25,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111257233] [2022-02-23 19:38:25,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 19:38:25,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:38:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:38:25,679 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) [2022-02-23 19:38:25,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 19:38:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:38:26,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 19:38:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:38:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-02-23 19:38:26,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:38:27,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:38:27,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846510345] [2022-02-23 19:38:27,098 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:38:27,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111257233] [2022-02-23 19:38:27,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111257233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:38:27,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:38:27,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-23 19:38:27,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976619046] [2022-02-23 19:38:27,099 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:38:27,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 19:38:27,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:38:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 19:38:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-23 19:38:27,100 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-02-23 19:38:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:38:27,235 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-02-23 19:38:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 19:38:27,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-02-23 19:38:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:38:27,236 INFO L225 Difference]: With dead ends: 58 [2022-02-23 19:38:27,236 INFO L226 Difference]: Without dead ends: 54 [2022-02-23 19:38:27,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-23 19:38:27,237 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:38:27,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:38:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-23 19:38:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-23 19:38:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 19:38:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-02-23 19:38:27,241 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-02-23 19:38:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:38:27,241 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-02-23 19:38:27,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-02-23 19:38:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-02-23 19:38:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-23 19:38:27,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:38:27,242 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:38:27,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 19:38:27,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 19:38:27,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:38:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:38:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2022-02-23 19:38:27,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:38:27,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587022906] [2022-02-23 19:38:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:38:27,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:38:27,460 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:38:27,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259489083] [2022-02-23 19:38:27,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:38:27,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:38:27,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:38:27,463 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) [2022-02-23 19:38:27,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 19:38:35,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:38:35,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:38:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-23 19:38:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:38:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 19:38:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:38:35,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:38:35,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587022906] [2022-02-23 19:38:35,897 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:38:35,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259489083] [2022-02-23 19:38:35,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259489083] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:38:35,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:38:35,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-02-23 19:38:35,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921339106] [2022-02-23 19:38:35,897 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:38:35,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 19:38:35,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:38:35,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 19:38:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-23 19:38:35,898 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-02-23 19:38:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:38:36,054 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-02-23 19:38:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 19:38:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-02-23 19:38:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:38:36,055 INFO L225 Difference]: With dead ends: 61 [2022-02-23 19:38:36,055 INFO L226 Difference]: Without dead ends: 57 [2022-02-23 19:38:36,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-02-23 19:38:36,056 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:38:36,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:38:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-23 19:38:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-23 19:38:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 19:38:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-02-23 19:38:36,059 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-02-23 19:38:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:38:36,060 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-02-23 19:38:36,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-02-23 19:38:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-02-23 19:38:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-23 19:38:36,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:38:36,062 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:38:36,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 19:38:36,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 19:38:36,270 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:38:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:38:36,270 INFO L85 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2022-02-23 19:38:36,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:38:36,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335845845] [2022-02-23 19:38:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:38:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:38:36,277 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:38:36,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23226168] [2022-02-23 19:38:36,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:38:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:38:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:38:36,279 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) [2022-02-23 19:38:36,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process