/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/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 05:31:11,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 05:31:11,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 05:31:11,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 05:31:11,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 05:31:11,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 05:31:11,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 05:31:11,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 05:31:11,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 05:31:11,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 05:31:11,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 05:31:11,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 05:31:11,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 05:31:11,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 05:31:11,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 05:31:11,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 05:31:11,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 05:31:11,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 05:31:11,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 05:31:11,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 05:31:11,333 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 05:31:11,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 05:31:11,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 05:31:11,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 05:31:11,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 05:31:11,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 05:31:11,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 05:31:11,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 05:31:11,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 05:31:11,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 05:31:11,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 05:31:11,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 05:31:11,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 05:31:11,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 05:31:11,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 05:31:11,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 05:31:11,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 05:31:11,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 05:31:11,365 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 05:31:11,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 05:31:11,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 05:31:11,369 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 05:31:11,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 05:31:11,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 05:31:11,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 05:31:11,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 05:31:11,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 05:31:11,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 05:31:11,371 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 05:31:11,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 05:31:11,371 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 05:31:11,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 05:31:11,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 05:31:11,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 05:31:11,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 05:31:11,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 05:31:11,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:31:11,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 05:31:11,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 05:31:11,373 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 05:31:11,373 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 05:31:11,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 05:31:11,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 05:31:11,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 05:31:11,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 05:31:11,652 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 05:31:11,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-03-20 05:31:11,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62a16dd18/2c7bd49db46c47adb5289d3ed814b158/FLAG7a095ae4c [2022-03-20 05:31:12,106 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 05:31:12,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-03-20 05:31:12,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62a16dd18/2c7bd49db46c47adb5289d3ed814b158/FLAG7a095ae4c [2022-03-20 05:31:12,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62a16dd18/2c7bd49db46c47adb5289d3ed814b158 [2022-03-20 05:31:12,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 05:31:12,136 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 05:31:12,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 05:31:12,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 05:31:12,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 05:31:12,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52eb6e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12, skipping insertion in model container [2022-03-20 05:31:12,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 05:31:12,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 05:31:12,319 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/egcd-ll_unwindbound100.c[489,502] [2022-03-20 05:31:12,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:31:12,347 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 05:31:12,360 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/egcd-ll_unwindbound100.c[489,502] [2022-03-20 05:31:12,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:31:12,396 INFO L208 MainTranslator]: Completed translation [2022-03-20 05:31:12,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12 WrapperNode [2022-03-20 05:31:12,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 05:31:12,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 05:31:12,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 05:31:12,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 05:31:12,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 05:31:12,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 05:31:12,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 05:31:12,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 05:31:12,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:31:12,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:12,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 05:31:12,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 05:31:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 05:31:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 05:31:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 05:31:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 05:31:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 05:31:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 05:31:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 05:31:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 05:31:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 05:31:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 05:31:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 05:31:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 05:31:12,555 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 05:31:12,557 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 05:31:12,706 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 05:31:12,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 05:31:12,718 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 05:31:12,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:31:12 BoogieIcfgContainer [2022-03-20 05:31:12,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 05:31:12,723 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 05:31:12,724 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 05:31:12,725 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 05:31:12,731 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:31:12" (1/1) ... [2022-03-20 05:31:12,734 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 05:31:12,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:31:12 BasicIcfg [2022-03-20 05:31:12,751 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 05:31:12,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 05:31:12,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 05:31:12,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 05:31:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:31:12" (1/4) ... [2022-03-20 05:31:12,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff026ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:31:12, skipping insertion in model container [2022-03-20 05:31:12,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:31:12" (2/4) ... [2022-03-20 05:31:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff026ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:31:12, skipping insertion in model container [2022-03-20 05:31:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:31:12" (3/4) ... [2022-03-20 05:31:12,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff026ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:31:12, skipping insertion in model container [2022-03-20 05:31:12,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:31:12" (4/4) ... [2022-03-20 05:31:12,758 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.cJordan [2022-03-20 05:31:12,763 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 05:31:12,763 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 05:31:12,799 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 05:31:12,805 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 05:31:12,805 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 05:31:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 05:31:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 05:31:12,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:12,825 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:12,825 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2022-03-20 05:31:12,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229824660] [2022-03-20 05:31:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:12,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:31:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:31:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 05:31:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:31:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:13,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229824660] [2022-03-20 05:31:13,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229824660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:31:13,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:31:13,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 05:31:13,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486886706] [2022-03-20 05:31:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:13,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 05:31:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 05:31:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:31:13,053 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:31:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:13,172 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-03-20 05:31:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 05:31:13,176 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 05:31:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:13,181 INFO L225 Difference]: With dead ends: 36 [2022-03-20 05:31:13,182 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 05:31:13,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:31:13,190 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:13,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:31:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 05:31:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 05:31:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 05:31:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 05:31:13,225 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-20 05:31:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:13,226 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 05:31:13,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:31:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 05:31:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 05:31:13,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:13,228 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:13,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 05:31:13,229 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2022-03-20 05:31:13,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827570910] [2022-03-20 05:31:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:13,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:31:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:31:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 05:31:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:31:13,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:13,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827570910] [2022-03-20 05:31:13,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827570910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:31:13,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:31:13,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:31:13,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326122103] [2022-03-20 05:31:13,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:13,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:31:13,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:31:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:31:13,364 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 05:31:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:13,497 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-20 05:31:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:31:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 05:31:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:13,499 INFO L225 Difference]: With dead ends: 32 [2022-03-20 05:31:13,499 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 05:31:13,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:31:13,501 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:13,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:31:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 05:31:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 05:31:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 05:31:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 05:31:13,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-20 05:31:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:13,509 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 05:31:13,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 05:31:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 05:31:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 05:31:13,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:13,510 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:13,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 05:31:13,514 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2022-03-20 05:31:13,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:13,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951246047] [2022-03-20 05:31:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:13,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:13,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:13,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242060186] [2022-03-20 05:31:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:13,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:13,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:13,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 05:31:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:31:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:31:13,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:31:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951246047] [2022-03-20 05:31:13,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242060186] [2022-03-20 05:31:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242060186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:31:13,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:31:13,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:31:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234094519] [2022-03-20 05:31:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:13,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:31:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:31:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:31:13,790 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-20 05:31:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:13,861 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-03-20 05:31:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:31:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-03-20 05:31:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:13,863 INFO L225 Difference]: With dead ends: 47 [2022-03-20 05:31:13,864 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 05:31:13,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:31:13,865 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:13,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 155 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:31:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 05:31:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 05:31:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 05:31:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-20 05:31:13,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-20 05:31:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:13,887 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-20 05:31:13,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-20 05:31:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-20 05:31:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 05:31:13,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:13,888 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:13,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:14,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:14,112 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2022-03-20 05:31:14,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:14,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760832932] [2022-03-20 05:31:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:14,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:14,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558560514] [2022-03-20 05:31:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:14,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:14,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 05:31:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:31:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:31:14,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:14,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760832932] [2022-03-20 05:31:14,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:14,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558560514] [2022-03-20 05:31:14,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558560514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:31:14,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:31:14,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 05:31:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713832442] [2022-03-20 05:31:14,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:14,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 05:31:14,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 05:31:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:31:14,460 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 05:31:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:14,575 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-03-20 05:31:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 05:31:14,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-20 05:31:14,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:14,580 INFO L225 Difference]: With dead ends: 51 [2022-03-20 05:31:14,580 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 05:31:14,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:31:14,588 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:14,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 209 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:31:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 05:31:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 05:31:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 05:31:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-20 05:31:14,604 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-20 05:31:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:14,605 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-20 05:31:14,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 05:31:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-20 05:31:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 05:31:14,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:14,606 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:14,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:14,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 05:31:14,816 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2022-03-20 05:31:14,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:14,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002044718] [2022-03-20 05:31:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:14,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:14,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631265512] [2022-03-20 05:31:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:14,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:14,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:14,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:14,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 05:31:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:31:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 05:31:15,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 05:31:15,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002044718] [2022-03-20 05:31:15,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631265512] [2022-03-20 05:31:15,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631265512] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:31:15,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:31:15,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 05:31:15,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103153406] [2022-03-20 05:31:15,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:15,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:31:15,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:15,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:31:15,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:31:15,182 INFO L87 Difference]: Start difference. First operand 50 states and 66 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:31:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:15,240 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2022-03-20 05:31:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:31:15,241 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 05:31:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:15,245 INFO L225 Difference]: With dead ends: 73 [2022-03-20 05:31:15,245 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 05:31:15,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:31:15,247 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:15,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:31:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 05:31:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 05:31:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 05:31:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-20 05:31:15,257 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-20 05:31:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:15,257 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-20 05:31:15,258 INFO L479 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:31:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-20 05:31:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 05:31:15,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:15,259 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:15,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:15,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:15,478 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2022-03-20 05:31:15,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:15,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518959457] [2022-03-20 05:31:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:15,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:15,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:15,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284861715] [2022-03-20 05:31:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:15,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:15,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 05:31:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:15,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:31:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 05:31:15,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:31:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518959457] [2022-03-20 05:31:15,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:15,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284861715] [2022-03-20 05:31:15,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284861715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:31:15,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:31:15,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:31:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192582557] [2022-03-20 05:31:15,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:15,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:31:15,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:31:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:31:15,624 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 05:31:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:15,652 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2022-03-20 05:31:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:31:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-20 05:31:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:15,653 INFO L225 Difference]: With dead ends: 85 [2022-03-20 05:31:15,653 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 05:31:15,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:31:15,654 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:15,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:31:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 05:31:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-20 05:31:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 05:31:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-20 05:31:15,663 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-20 05:31:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:15,664 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-20 05:31:15,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 05:31:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-20 05:31:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 05:31:15,665 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:15,665 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:15,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:15,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:15,876 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2022-03-20 05:31:15,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:15,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143678809] [2022-03-20 05:31:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:15,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:15,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:15,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567326372] [2022-03-20 05:31:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:15,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:15,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:15,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 05:31:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:15,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:31:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 05:31:16,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 05:31:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:16,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143678809] [2022-03-20 05:31:16,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:16,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567326372] [2022-03-20 05:31:16,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567326372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:31:16,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:31:16,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 05:31:16,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202991760] [2022-03-20 05:31:16,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:16,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 05:31:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:16,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 05:31:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 05:31:16,152 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 05:31:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:16,267 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2022-03-20 05:31:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 05:31:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2022-03-20 05:31:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:16,270 INFO L225 Difference]: With dead ends: 202 [2022-03-20 05:31:16,270 INFO L226 Difference]: Without dead ends: 200 [2022-03-20 05:31:16,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:31:16,271 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:16,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 176 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:31:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-20 05:31:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-03-20 05:31:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 120 states have internal predecessors, (133), 63 states have call successors, (63), 23 states have call predecessors, (63), 21 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 05:31:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2022-03-20 05:31:16,287 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 42 [2022-03-20 05:31:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:16,287 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 251 transitions. [2022-03-20 05:31:16,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 05:31:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions. [2022-03-20 05:31:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 05:31:16,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:16,289 INFO L499 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, 1, 1] [2022-03-20 05:31:16,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 05:31:16,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:16,504 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1627394196, now seen corresponding path program 1 times [2022-03-20 05:31:16,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:16,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140553303] [2022-03-20 05:31:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:16,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:16,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:16,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849203960] [2022-03-20 05:31:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:16,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:16,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:16,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 05:31:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:16,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 05:31:16,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 05:31:16,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:31:16,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140553303] [2022-03-20 05:31:16,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:16,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849203960] [2022-03-20 05:31:16,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849203960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:31:16,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:31:16,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:31:16,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409016920] [2022-03-20 05:31:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:16,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:31:16,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:31:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:31:16,710 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 05:31:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:16,740 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2022-03-20 05:31:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:31:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-20 05:31:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:16,742 INFO L225 Difference]: With dead ends: 206 [2022-03-20 05:31:16,742 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 05:31:16,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:31:16,743 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:16,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:31:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 05:31:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-20 05:31:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 129 states have internal predecessors, (142), 60 states have call successors, (60), 26 states have call predecessors, (60), 24 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 05:31:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2022-03-20 05:31:16,758 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 42 [2022-03-20 05:31:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:16,758 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2022-03-20 05:31:16,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 05:31:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2022-03-20 05:31:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 05:31:16,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:16,760 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:16,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:16,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:16,984 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2022-03-20 05:31:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:16,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307182035] [2022-03-20 05:31:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:16,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:16,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227418378] [2022-03-20 05:31:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:16,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:16,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:16,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 05:31:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:17,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 05:31:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 05:31:17,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 05:31:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:17,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307182035] [2022-03-20 05:31:17,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:17,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227418378] [2022-03-20 05:31:17,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227418378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:31:17,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:31:17,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 05:31:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596635331] [2022-03-20 05:31:17,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:17,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:31:17,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:31:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:31:17,261 INFO L87 Difference]: Start difference. First operand 203 states and 254 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 05:31:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:17,371 INFO L93 Difference]: Finished difference Result 230 states and 285 transitions. [2022-03-20 05:31:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:31:17,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-20 05:31:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:17,373 INFO L225 Difference]: With dead ends: 230 [2022-03-20 05:31:17,374 INFO L226 Difference]: Without dead ends: 216 [2022-03-20 05:31:17,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:31:17,374 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:17,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 147 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:31:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-20 05:31:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-03-20 05:31:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 128 states have (on average 1.1640625) internal successors, (149), 139 states have internal predecessors, (149), 59 states have call successors, (59), 27 states have call predecessors, (59), 26 states have return successors, (54), 47 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 05:31:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-03-20 05:31:17,385 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 44 [2022-03-20 05:31:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:17,386 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-03-20 05:31:17,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 05:31:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-03-20 05:31:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 05:31:17,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:17,387 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:17,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:17,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:17,601 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:17,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 2 times [2022-03-20 05:31:17,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:17,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920237201] [2022-03-20 05:31:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:17,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:17,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:17,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139953863] [2022-03-20 05:31:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:31:17,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:17,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:17,613 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:17,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 05:31:17,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:31:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:31:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 05:31:17,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 05:31:17,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 05:31:17,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920237201] [2022-03-20 05:31:17,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139953863] [2022-03-20 05:31:17,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139953863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:31:17,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:31:17,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 05:31:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497803612] [2022-03-20 05:31:17,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:17,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 05:31:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 05:31:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 05:31:17,991 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 05:31:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:19,212 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2022-03-20 05:31:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 05:31:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 47 [2022-03-20 05:31:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:19,217 INFO L225 Difference]: With dead ends: 251 [2022-03-20 05:31:19,217 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 05:31:19,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:31:19,218 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:19,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 05:31:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 05:31:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-03-20 05:31:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.126865671641791) internal successors, (151), 142 states have internal predecessors, (151), 47 states have call successors, (47), 29 states have call predecessors, (47), 28 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 05:31:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-03-20 05:31:19,233 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 47 [2022-03-20 05:31:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:19,234 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-03-20 05:31:19,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 05:31:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-03-20 05:31:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 05:31:19,235 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:19,241 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:19,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:19,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 05:31:19,442 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2022-03-20 05:31:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:19,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250320841] [2022-03-20 05:31:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:19,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:19,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070230473] [2022-03-20 05:31:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:19,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:19,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:19,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 05:31:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:31:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 05:31:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 05:31:19,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-20 05:31:19,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250320841] [2022-03-20 05:31:19,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070230473] [2022-03-20 05:31:19,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070230473] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:31:19,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:31:19,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 05:31:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550434110] [2022-03-20 05:31:19,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:31:19,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:31:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:31:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 05:31:19,930 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 05:31:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:19,959 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2022-03-20 05:31:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:31:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-03-20 05:31:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:19,961 INFO L225 Difference]: With dead ends: 214 [2022-03-20 05:31:19,961 INFO L226 Difference]: Without dead ends: 192 [2022-03-20 05:31:19,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:31:19,962 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:19,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:31:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-20 05:31:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-03-20 05:31:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.112) internal successors, (139), 129 states have internal predecessors, (139), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 05:31:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2022-03-20 05:31:19,969 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 61 [2022-03-20 05:31:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:19,969 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2022-03-20 05:31:19,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 05:31:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2022-03-20 05:31:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 05:31:19,971 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:19,971 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:20,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:20,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:20,196 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 2 times [2022-03-20 05:31:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075291150] [2022-03-20 05:31:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:20,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:20,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257686359] [2022-03-20 05:31:20,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:31:20,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:20,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:20,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 05:31:20,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:31:20,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:31:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 05:31:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 05:31:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 05:31:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075291150] [2022-03-20 05:31:20,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257686359] [2022-03-20 05:31:20,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257686359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:31:20,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:31:20,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 05:31:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384975297] [2022-03-20 05:31:20,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:20,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 05:31:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 05:31:20,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:31:20,744 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-20 05:31:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:20,982 INFO L93 Difference]: Finished difference Result 507 states and 572 transitions. [2022-03-20 05:31:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 05:31:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 99 [2022-03-20 05:31:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:20,991 INFO L225 Difference]: With dead ends: 507 [2022-03-20 05:31:20,991 INFO L226 Difference]: Without dead ends: 507 [2022-03-20 05:31:20,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 05:31:20,992 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 94 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:20,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 230 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:31:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-20 05:31:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-03-20 05:31:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 335 states have (on average 1.0955223880597016) internal successors, (367), 345 states have internal predecessors, (367), 104 states have call successors, (104), 68 states have call predecessors, (104), 67 states have return successors, (101), 93 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 05:31:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 572 transitions. [2022-03-20 05:31:21,013 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 572 transitions. Word has length 99 [2022-03-20 05:31:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:21,014 INFO L478 AbstractCegarLoop]: Abstraction has 507 states and 572 transitions. [2022-03-20 05:31:21,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-20 05:31:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 572 transitions. [2022-03-20 05:31:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 05:31:21,022 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:21,022 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:21,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:21,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 05:31:21,239 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1084056642, now seen corresponding path program 3 times [2022-03-20 05:31:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067867032] [2022-03-20 05:31:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:21,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:21,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651137327] [2022-03-20 05:31:21,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:31:21,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:21,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:21,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:21,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 05:31:21,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-03-20 05:31:21,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:31:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 05:31:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 05:31:21,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-20 05:31:22,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067867032] [2022-03-20 05:31:22,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651137327] [2022-03-20 05:31:22,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651137327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:31:22,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:31:22,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 05:31:22,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783156041] [2022-03-20 05:31:22,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:22,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 05:31:22,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 05:31:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 05:31:22,459 INFO L87 Difference]: Start difference. First operand 507 states and 572 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-20 05:31:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:23,099 INFO L93 Difference]: Finished difference Result 1143 states and 1292 transitions. [2022-03-20 05:31:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 05:31:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 213 [2022-03-20 05:31:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:23,109 INFO L225 Difference]: With dead ends: 1143 [2022-03-20 05:31:23,110 INFO L226 Difference]: Without dead ends: 1143 [2022-03-20 05:31:23,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 05:31:23,111 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 323 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:23,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 354 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 05:31:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-03-20 05:31:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2022-03-20 05:31:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 755 states have (on average 1.0900662251655628) internal successors, (823), 777 states have internal predecessors, (823), 236 states have call successors, (236), 152 states have call predecessors, (236), 151 states have return successors, (233), 213 states have call predecessors, (233), 233 states have call successors, (233) [2022-03-20 05:31:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1292 transitions. [2022-03-20 05:31:23,143 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1292 transitions. Word has length 213 [2022-03-20 05:31:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:23,144 INFO L478 AbstractCegarLoop]: Abstraction has 1143 states and 1292 transitions. [2022-03-20 05:31:23,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (68), 14 states have call predecessors, (68), 13 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-20 05:31:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1292 transitions. [2022-03-20 05:31:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-03-20 05:31:23,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:23,153 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:23,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:23,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 05:31:23,367 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -597128254, now seen corresponding path program 4 times [2022-03-20 05:31:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655261424] [2022-03-20 05:31:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:23,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:23,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85114985] [2022-03-20 05:31:23,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 05:31:23,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:23,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:23,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:23,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 05:31:23,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 05:31:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:31:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 05:31:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:31:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 05:31:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:31:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-20 05:31:25,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:31:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655261424] [2022-03-20 05:31:25,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:31:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85114985] [2022-03-20 05:31:25,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85114985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:31:25,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:31:25,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 05:31:25,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945664469] [2022-03-20 05:31:25,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:31:25,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 05:31:25,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:31:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 05:31:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 05:31:25,938 INFO L87 Difference]: Start difference. First operand 1143 states and 1292 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (140), 26 states have call predecessors, (140), 25 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-20 05:31:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:31:27,702 INFO L93 Difference]: Finished difference Result 2415 states and 2732 transitions. [2022-03-20 05:31:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 05:31:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (140), 26 states have call predecessors, (140), 25 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 441 [2022-03-20 05:31:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:31:27,716 INFO L225 Difference]: With dead ends: 2415 [2022-03-20 05:31:27,717 INFO L226 Difference]: Without dead ends: 2415 [2022-03-20 05:31:27,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 05:31:27,719 INFO L913 BasicCegarLoop]: 167 mSDtfsCounter, 651 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 05:31:27,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 848 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 05:31:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2022-03-20 05:31:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2415. [2022-03-20 05:31:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 1595 states have (on average 1.0877742946708464) internal successors, (1735), 1641 states have internal predecessors, (1735), 500 states have call successors, (500), 320 states have call predecessors, (500), 319 states have return successors, (497), 453 states have call predecessors, (497), 497 states have call successors, (497) [2022-03-20 05:31:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 2732 transitions. [2022-03-20 05:31:27,784 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 2732 transitions. Word has length 441 [2022-03-20 05:31:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:31:27,787 INFO L478 AbstractCegarLoop]: Abstraction has 2415 states and 2732 transitions. [2022-03-20 05:31:27,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (140), 26 states have call predecessors, (140), 25 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-20 05:31:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 2732 transitions. [2022-03-20 05:31:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-03-20 05:31:27,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:31:27,811 INFO L499 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:31:27,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 05:31:28,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 05:31:28,028 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:31:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:31:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash -806774078, now seen corresponding path program 5 times [2022-03-20 05:31:28,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:31:28,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808368744] [2022-03-20 05:31:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:31:28,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:31:28,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:31:28,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804403384] [2022-03-20 05:31:28,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 05:31:28,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:31:28,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:31:28,076 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:31:28,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 05:41:36,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2022-03-20 05:41:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:41:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 05:41:36,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:41:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-20 05:41:38,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:41:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-03-20 05:41:41,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:41:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808368744] [2022-03-20 05:41:41,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:41:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804403384] [2022-03-20 05:41:41,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804403384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:41:41,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:41:41,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-20 05:41:41,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174552987] [2022-03-20 05:41:41,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:41:41,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 05:41:41,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:41:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 05:41:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 05:41:41,941 INFO L87 Difference]: Start difference. First operand 2415 states and 2732 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (284), 50 states have call predecessors, (284), 49 states have return successors, (282), 94 states have call predecessors, (282), 95 states have call successors, (282) [2022-03-20 05:41:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:41:47,242 INFO L93 Difference]: Finished difference Result 4959 states and 5612 transitions. [2022-03-20 05:41:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-20 05:41:47,243 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (284), 50 states have call predecessors, (284), 49 states have return successors, (282), 94 states have call predecessors, (282), 95 states have call successors, (282) Word has length 897 [2022-03-20 05:41:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:41:47,262 INFO L225 Difference]: With dead ends: 4959 [2022-03-20 05:41:47,262 INFO L226 Difference]: Without dead ends: 4959 [2022-03-20 05:41:47,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1886 GetRequests, 1697 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 05:41:47,270 INFO L913 BasicCegarLoop]: 311 mSDtfsCounter, 1689 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 1182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1182 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 05:41:47,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 1548 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1182 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 05:41:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2022-03-20 05:41:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4959. [2022-03-20 05:41:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 3275 states have (on average 1.0867175572519083) internal successors, (3559), 3369 states have internal predecessors, (3559), 1028 states have call successors, (1028), 656 states have call predecessors, (1028), 655 states have return successors, (1025), 933 states have call predecessors, (1025), 1025 states have call successors, (1025) [2022-03-20 05:41:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 5612 transitions. [2022-03-20 05:41:47,378 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 5612 transitions. Word has length 897 [2022-03-20 05:41:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:41:47,379 INFO L478 AbstractCegarLoop]: Abstraction has 4959 states and 5612 transitions. [2022-03-20 05:41:47,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (284), 50 states have call predecessors, (284), 49 states have return successors, (282), 94 states have call predecessors, (282), 95 states have call successors, (282) [2022-03-20 05:41:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 5612 transitions. [2022-03-20 05:41:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1810 [2022-03-20 05:41:47,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:41:47,468 INFO L499 BasicCegarLoop]: trace histogram [283, 282, 282, 95, 94, 94, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:41:47,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 05:41:47,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 05:41:47,679 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:41:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:41:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1393998018, now seen corresponding path program 6 times [2022-03-20 05:41:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:41:47,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497100596] [2022-03-20 05:41:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:41:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:41:47,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:41:47,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235926575] [2022-03-20 05:41:47,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 05:41:47,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:41:47,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:41:47,733 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:41:47,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process