/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_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:42:37,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:42:37,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:42:37,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:42:37,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:42:37,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:42:37,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:42:37,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:42:37,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:42:37,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:42:37,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:42:37,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:42:37,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:42:37,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:42:37,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:42:37,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:42:37,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:42:37,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:42:37,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:42:37,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:42:37,395 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:42:37,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:42:37,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:42:37,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:42:37,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:42:37,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:42:37,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:42:37,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:42:37,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:42:37,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:42:37,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:42:37,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:42:37,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:42:37,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:42:37,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:42:37,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:42:37,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:42:37,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:42:37,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:42:37,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:42:37,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:42:37,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:42:37,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:42:37,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:42:37,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:42:37,435 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:42:37,435 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:42:37,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:42:37,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:42:37,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:42:37,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:42:37,659 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:42:37,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-04-06 06:42:37,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3554b459a/cea225e5d5b84904a8d613518d43c0ff/FLAG3fdf796b7 [2022-04-06 06:42:38,063 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:42:38,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2022-04-06 06:42:38,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3554b459a/cea225e5d5b84904a8d613518d43c0ff/FLAG3fdf796b7 [2022-04-06 06:42:38,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3554b459a/cea225e5d5b84904a8d613518d43c0ff [2022-04-06 06:42:38,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:42:38,080 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:42:38,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:42:38,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:42:38,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:42:38,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f254aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38, skipping insertion in model container [2022-04-06 06:42:38,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:42:38,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:42:38,221 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_unwindbound50.c[489,502] [2022-04-06 06:42:38,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:42:38,242 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:42:38,250 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_unwindbound50.c[489,502] [2022-04-06 06:42:38,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:42:38,263 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:42:38,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38 WrapperNode [2022-04-06 06:42:38,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:42:38,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:42:38,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:42:38,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:42:38,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:42:38,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:42:38,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:42:38,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:42:38,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:42:38,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:38,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 06:42:38,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 06:42:38,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:42:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:42:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:42:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:42:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:42:38,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:42:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:42:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:42:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:42:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:42:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 06:42:38,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:42:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:42:38,392 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:42:38,394 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:42:38,500 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:42:38,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:42:38,505 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 06:42:38,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:42:38 BoogieIcfgContainer [2022-04-06 06:42:38,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:42:38,507 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:42:38,507 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:42:38,507 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:42:38,509 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:42:38" (1/1) ... [2022-04-06 06:42:38,512 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:42:38,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:42:38 BasicIcfg [2022-04-06 06:42:38,532 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:42:38,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:42:38,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:42:38,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:42:38,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:42:38" (1/4) ... [2022-04-06 06:42:38,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b159c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:42:38, skipping insertion in model container [2022-04-06 06:42:38,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:42:38" (2/4) ... [2022-04-06 06:42:38,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b159c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:42:38, skipping insertion in model container [2022-04-06 06:42:38,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:42:38" (3/4) ... [2022-04-06 06:42:38,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b159c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:42:38, skipping insertion in model container [2022-04-06 06:42:38,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:42:38" (4/4) ... [2022-04-06 06:42:38,538 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.cJordan [2022-04-06 06:42:38,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:42:38,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:42:38,577 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:42:38,582 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 06:42:38,582 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:42:38,591 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) [2022-04-06 06:42:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 06:42:38,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:38,596 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:42:38,597 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2022-04-06 06:42:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932913675] [2022-04-06 06:42:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:38,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:42:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:38,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:42:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:42:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:42:38,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:38,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932913675] [2022-04-06 06:42:38,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932913675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:42:38,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:42:38,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:42:38,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852747764] [2022-04-06 06:42:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:38,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:42:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:42:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:42:38,829 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) [2022-04-06 06:42:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:38,930 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-04-06 06:42:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:42:38,932 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 [2022-04-06 06:42:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:38,937 INFO L225 Difference]: With dead ends: 36 [2022-04-06 06:42:38,938 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 06:42:38,939 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 [2022-04-06 06:42:38,943 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 [2022-04-06 06:42:38,944 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] [2022-04-06 06:42:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 06:42:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 06:42:38,973 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) [2022-04-06 06:42:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 06:42:38,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-04-06 06:42:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:38,978 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 06:42:38,979 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) [2022-04-06 06:42:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 06:42:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:42:38,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:38,981 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:42:38,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 06:42:38,981 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2022-04-06 06:42:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:38,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776980818] [2022-04-06 06:42:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:39,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:42:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:42:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:42:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:42:39,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:39,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776980818] [2022-04-06 06:42:39,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776980818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:42:39,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:42:39,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:42:39,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113386249] [2022-04-06 06:42:39,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:39,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:42:39,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:42:39,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:42:39,132 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) [2022-04-06 06:42:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:39,222 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-04-06 06:42:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:42:39,223 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 [2022-04-06 06:42:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:39,224 INFO L225 Difference]: With dead ends: 32 [2022-04-06 06:42:39,225 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 06:42:39,228 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 [2022-04-06 06:42:39,229 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-04-06 06:42:39,230 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] [2022-04-06 06:42:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 06:42:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 06:42:39,243 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) [2022-04-06 06:42:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 06:42:39,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-04-06 06:42:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:39,244 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 06:42:39,245 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) [2022-04-06 06:42:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 06:42:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:42:39,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:39,245 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:42:39,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 06:42:39,246 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2022-04-06 06:42:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151890101] [2022-04-06 06:42:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:39,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776676253] [2022-04-06 06:42:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:39,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:39,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:39,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:39,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:42:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:42:39,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:42:39,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:42:39,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151890101] [2022-04-06 06:42:39,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776676253] [2022-04-06 06:42:39,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776676253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:42:39,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:42:39,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:42:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365977117] [2022-04-06 06:42:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:39,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:42:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:42:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:42:39,483 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) [2022-04-06 06:42:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:39,548 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-04-06 06:42:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:42:39,551 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 [2022-04-06 06:42:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:39,551 INFO L225 Difference]: With dead ends: 47 [2022-04-06 06:42:39,552 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 06:42:39,552 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 [2022-04-06 06:42:39,552 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:39,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 140 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:42:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 06:42:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 06:42:39,562 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) [2022-04-06 06:42:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-04-06 06:42:39,563 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-04-06 06:42:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:39,563 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-04-06 06:42:39,563 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) [2022-04-06 06:42:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-04-06 06:42:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 06:42:39,564 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:39,564 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] [2022-04-06 06:42:39,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 06:42:39,766 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 [2022-04-06 06:42:39,767 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2022-04-06 06:42:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:39,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581593291] [2022-04-06 06:42:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:39,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:39,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752221307] [2022-04-06 06:42:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:39,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:39,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:39,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:39,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:42:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 06:42:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:42:39,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:40,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:40,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581593291] [2022-04-06 06:42:40,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:40,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752221307] [2022-04-06 06:42:40,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752221307] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 06:42:40,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:42:40,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 06:42:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511275354] [2022-04-06 06:42:40,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:40,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 06:42:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 06:42:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:42:40,057 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) [2022-04-06 06:42:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:40,175 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-04-06 06:42:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 06:42:40,176 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 [2022-04-06 06:42:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:40,178 INFO L225 Difference]: With dead ends: 51 [2022-04-06 06:42:40,178 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 06:42:40,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 06:42:40,180 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:40,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 172 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:42:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 06:42:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 06:42:40,193 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) [2022-04-06 06:42:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-04-06 06:42:40,197 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-04-06 06:42:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:40,198 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-04-06 06:42:40,198 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) [2022-04-06 06:42:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-04-06 06:42:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 06:42:40,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:40,200 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] [2022-04-06 06:42:40,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:40,415 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 [2022-04-06 06:42:40,416 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2022-04-06 06:42:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180074515] [2022-04-06 06:42:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:40,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075915219] [2022-04-06 06:42:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:40,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:40,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:42:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:40,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 06:42:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 06:42:40,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:42:40,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180074515] [2022-04-06 06:42:40,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075915219] [2022-04-06 06:42:40,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075915219] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 06:42:40,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:42:40,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 06:42:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245636730] [2022-04-06 06:42:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:40,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:42:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:42:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:42:40,713 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) [2022-04-06 06:42:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:40,755 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2022-04-06 06:42:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:42:40,755 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 [2022-04-06 06:42:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:40,757 INFO L225 Difference]: With dead ends: 73 [2022-04-06 06:42:40,757 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 06:42:40,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:42:40,758 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:40,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:42:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 06:42:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 06:42:40,763 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) [2022-04-06 06:42:40,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-04-06 06:42:40,764 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-04-06 06:42:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:40,764 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-04-06 06:42:40,764 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) [2022-04-06 06:42:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-04-06 06:42:40,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 06:42:40,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:40,765 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] [2022-04-06 06:42:40,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:40,975 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 [2022-04-06 06:42:40,976 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2022-04-06 06:42:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224390907] [2022-04-06 06:42:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:40,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:40,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614537954] [2022-04-06 06:42:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:40,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:40,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:40,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:40,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:42:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:42:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:42:41,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:42:41,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224390907] [2022-04-06 06:42:41,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614537954] [2022-04-06 06:42:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614537954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:42:41,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:42:41,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:42:41,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501127447] [2022-04-06 06:42:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:41,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:42:41,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:42:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:42:41,075 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) [2022-04-06 06:42:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:41,105 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2022-04-06 06:42:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:42:41,106 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 [2022-04-06 06:42:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:41,107 INFO L225 Difference]: With dead ends: 85 [2022-04-06 06:42:41,107 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 06:42:41,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:42:41,108 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:41,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:42:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 06:42:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-04-06 06:42:41,124 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) [2022-04-06 06:42:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-04-06 06:42:41,125 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-04-06 06:42:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:41,125 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-04-06 06:42:41,125 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) [2022-04-06 06:42:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-04-06 06:42:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 06:42:41,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:41,126 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] [2022-04-06 06:42:41,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:41,335 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 [2022-04-06 06:42:41,336 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2022-04-06 06:42:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324309883] [2022-04-06 06:42:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:41,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:41,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509766156] [2022-04-06 06:42:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:41,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:41,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:41,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 06:42:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:42:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:42:41,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:42:41,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324309883] [2022-04-06 06:42:41,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509766156] [2022-04-06 06:42:41,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509766156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:42:41,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:42:41,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 06:42:41,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42574714] [2022-04-06 06:42:41,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:41,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 06:42:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 06:42:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 06:42:41,545 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) [2022-04-06 06:42:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:41,623 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2022-04-06 06:42:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 06:42:41,624 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 [2022-04-06 06:42:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:41,627 INFO L225 Difference]: With dead ends: 202 [2022-04-06 06:42:41,627 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 06:42:41,628 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 [2022-04-06 06:42:41,628 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:41,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 176 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:42:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 06:42:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-04-06 06:42:41,650 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) [2022-04-06 06:42:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2022-04-06 06:42:41,654 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 42 [2022-04-06 06:42:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:41,654 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 251 transitions. [2022-04-06 06:42:41,655 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) [2022-04-06 06:42:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions. [2022-04-06 06:42:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 06:42:41,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:41,656 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] [2022-04-06 06:42:41,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:41,875 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 [2022-04-06 06:42:41,878 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1627394196, now seen corresponding path program 1 times [2022-04-06 06:42:41,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:41,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141179592] [2022-04-06 06:42:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:41,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:41,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:41,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694337277] [2022-04-06 06:42:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:41,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:41,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 06:42:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 06:42:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 06:42:42,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:42:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141179592] [2022-04-06 06:42:42,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:42,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694337277] [2022-04-06 06:42:42,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694337277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:42:42,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:42:42,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:42:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386972619] [2022-04-06 06:42:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:42,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:42:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:42:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:42:42,082 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) [2022-04-06 06:42:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:42,115 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2022-04-06 06:42:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:42:42,115 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 [2022-04-06 06:42:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:42,119 INFO L225 Difference]: With dead ends: 206 [2022-04-06 06:42:42,119 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 06:42:42,119 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 [2022-04-06 06:42:42,120 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:42,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:42:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 06:42:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-04-06 06:42:42,134 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) [2022-04-06 06:42:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2022-04-06 06:42:42,136 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 42 [2022-04-06 06:42:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:42,137 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2022-04-06 06:42:42,137 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) [2022-04-06 06:42:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2022-04-06 06:42:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 06:42:42,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:42,139 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] [2022-04-06 06:42:42,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:42,340 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 [2022-04-06 06:42:42,340 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2022-04-06 06:42:42,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:42,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745397578] [2022-04-06 06:42:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:42,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:42,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574222792] [2022-04-06 06:42:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:42,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:42,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:42,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:42,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 06:42:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 06:42:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 06:42:42,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 06:42:42,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:42,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745397578] [2022-04-06 06:42:42,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:42,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574222792] [2022-04-06 06:42:42,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574222792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:42:42,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:42:42,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 06:42:42,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892887663] [2022-04-06 06:42:42,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:42,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 06:42:42,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:42,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 06:42:42,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:42:42,574 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) [2022-04-06 06:42:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:42,678 INFO L93 Difference]: Finished difference Result 230 states and 285 transitions. [2022-04-06 06:42:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 06:42:42,678 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 [2022-04-06 06:42:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:42,681 INFO L225 Difference]: With dead ends: 230 [2022-04-06 06:42:42,681 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 06:42:42,681 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:42:42,683 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:42,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 122 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:42:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 06:42:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-04-06 06:42:42,695 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) [2022-04-06 06:42:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-04-06 06:42:42,697 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 44 [2022-04-06 06:42:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:42,698 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-04-06 06:42:42,698 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) [2022-04-06 06:42:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-04-06 06:42:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 06:42:42,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:42,701 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] [2022-04-06 06:42:42,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:42,906 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 [2022-04-06 06:42:42,907 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 2 times [2022-04-06 06:42:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532939558] [2022-04-06 06:42:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:42,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:42,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570270141] [2022-04-06 06:42:42,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:42:42,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:42,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:42,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 06:42:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:42:42,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:42:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 06:42:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 06:42:43,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 06:42:43,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532939558] [2022-04-06 06:42:43,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570270141] [2022-04-06 06:42:43,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570270141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:42:43,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:42:43,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 06:42:43,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678655859] [2022-04-06 06:42:43,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:43,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 06:42:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 06:42:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 06:42:43,215 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) [2022-04-06 06:42:44,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:42:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:44,675 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2022-04-06 06:42:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 06:42:44,675 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 [2022-04-06 06:42:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:44,676 INFO L225 Difference]: With dead ends: 251 [2022-04-06 06:42:44,677 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 06:42:44,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-06 06:42:44,677 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:44,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 06:42:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 06:42:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-04-06 06:42:44,683 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) [2022-04-06 06:42:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-04-06 06:42:44,684 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 47 [2022-04-06 06:42:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:44,684 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-04-06 06:42:44,684 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) [2022-04-06 06:42:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-04-06 06:42:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 06:42:44,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:44,685 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] [2022-04-06 06:42:44,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:44,911 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 [2022-04-06 06:42:44,912 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2022-04-06 06:42:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:44,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29954400] [2022-04-06 06:42:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:44,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504862901] [2022-04-06 06:42:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:44,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:44,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:44,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 06:42:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:42:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 06:42:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 06:42:45,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 06:42:45,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29954400] [2022-04-06 06:42:45,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504862901] [2022-04-06 06:42:45,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504862901] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 06:42:45,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:42:45,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 06:42:45,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376620799] [2022-04-06 06:42:45,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:42:45,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:42:45,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:42:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 06:42:45,355 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) [2022-04-06 06:42:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:45,383 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2022-04-06 06:42:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:42:45,384 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 [2022-04-06 06:42:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:45,385 INFO L225 Difference]: With dead ends: 214 [2022-04-06 06:42:45,385 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 06:42:45,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:42:45,385 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:45,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:42:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 06:42:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-04-06 06:42:45,389 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) [2022-04-06 06:42:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2022-04-06 06:42:45,390 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 61 [2022-04-06 06:42:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:45,390 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2022-04-06 06:42:45,391 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) [2022-04-06 06:42:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2022-04-06 06:42:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 06:42:45,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:45,392 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] [2022-04-06 06:42:45,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:45,607 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 [2022-04-06 06:42:45,608 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 2 times [2022-04-06 06:42:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:45,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231327107] [2022-04-06 06:42:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:45,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:45,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843166054] [2022-04-06 06:42:45,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:42:45,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:45,620 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:45,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 06:42:45,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:42:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:42:45,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:42:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 06:42:45,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 06:42:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231327107] [2022-04-06 06:42:45,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843166054] [2022-04-06 06:42:45,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843166054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:42:45,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:42:45,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 06:42:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103474981] [2022-04-06 06:42:45,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:45,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 06:42:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 06:42:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:42:45,996 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) [2022-04-06 06:42:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:46,179 INFO L93 Difference]: Finished difference Result 507 states and 572 transitions. [2022-04-06 06:42:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 06:42:46,179 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 [2022-04-06 06:42:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:46,181 INFO L225 Difference]: With dead ends: 507 [2022-04-06 06:42:46,181 INFO L226 Difference]: Without dead ends: 507 [2022-04-06 06:42:46,181 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 [2022-04-06 06:42:46,182 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:46,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 230 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:42:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-04-06 06:42:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-04-06 06:42:46,190 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) [2022-04-06 06:42:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 572 transitions. [2022-04-06 06:42:46,191 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 572 transitions. Word has length 99 [2022-04-06 06:42:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:46,192 INFO L478 AbstractCegarLoop]: Abstraction has 507 states and 572 transitions. [2022-04-06 06:42:46,192 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) [2022-04-06 06:42:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 572 transitions. [2022-04-06 06:42:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 06:42:46,194 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:46,194 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] [2022-04-06 06:42:46,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:46,407 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 [2022-04-06 06:42:46,407 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1084056642, now seen corresponding path program 3 times [2022-04-06 06:42:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415113100] [2022-04-06 06:42:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:46,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:46,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:46,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975020828] [2022-04-06 06:42:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 06:42:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:46,418 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:46,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 06:42:46,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-04-06 06:42:46,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:42:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 06:42:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 06:42:46,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-04-06 06:42:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415113100] [2022-04-06 06:42:47,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:47,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975020828] [2022-04-06 06:42:47,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975020828] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:42:47,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:42:47,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 06:42:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123377737] [2022-04-06 06:42:47,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:47,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 06:42:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 06:42:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 06:42:47,400 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) [2022-04-06 06:42:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:47,973 INFO L93 Difference]: Finished difference Result 1143 states and 1292 transitions. [2022-04-06 06:42:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 06:42:47,973 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 [2022-04-06 06:42:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:47,977 INFO L225 Difference]: With dead ends: 1143 [2022-04-06 06:42:47,977 INFO L226 Difference]: Without dead ends: 1143 [2022-04-06 06:42:47,978 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 [2022-04-06 06:42:47,978 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 323 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:47,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 354 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 06:42:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-04-06 06:42:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2022-04-06 06:42:47,998 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) [2022-04-06 06:42:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1292 transitions. [2022-04-06 06:42:48,001 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1292 transitions. Word has length 213 [2022-04-06 06:42:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:48,002 INFO L478 AbstractCegarLoop]: Abstraction has 1143 states and 1292 transitions. [2022-04-06 06:42:48,002 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) [2022-04-06 06:42:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1292 transitions. [2022-04-06 06:42:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-04-06 06:42:48,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:48,009 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] [2022-04-06 06:42:48,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:48,227 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 [2022-04-06 06:42:48,228 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -597128254, now seen corresponding path program 4 times [2022-04-06 06:42:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:48,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658448282] [2022-04-06 06:42:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:48,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509279871] [2022-04-06 06:42:48,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 06:42:48,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:48,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:48,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:48,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 06:42:48,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 06:42:48,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:42:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 06:42:48,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:42:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 06:42:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:42:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-04-06 06:42:50,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:42:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658448282] [2022-04-06 06:42:50,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:42:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509279871] [2022-04-06 06:42:50,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509279871] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:42:50,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:42:50,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-04-06 06:42:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417824660] [2022-04-06 06:42:50,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:42:50,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 06:42:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:42:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 06:42:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 06:42:50,494 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) [2022-04-06 06:42:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:42:51,990 INFO L93 Difference]: Finished difference Result 2415 states and 2732 transitions. [2022-04-06 06:42:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 06:42:51,992 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 [2022-04-06 06:42:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:42:52,001 INFO L225 Difference]: With dead ends: 2415 [2022-04-06 06:42:52,002 INFO L226 Difference]: Without dead ends: 2415 [2022-04-06 06:42:52,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 06:42:52,004 INFO L913 BasicCegarLoop]: 167 mSDtfsCounter, 651 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 06:42:52,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 848 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 06:42:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2022-04-06 06:42:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2415. [2022-04-06 06:42:52,042 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) [2022-04-06 06:42:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 2732 transitions. [2022-04-06 06:42:52,050 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 2732 transitions. Word has length 441 [2022-04-06 06:42:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:42:52,052 INFO L478 AbstractCegarLoop]: Abstraction has 2415 states and 2732 transitions. [2022-04-06 06:42:52,053 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) [2022-04-06 06:42:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 2732 transitions. [2022-04-06 06:42:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-04-06 06:42:52,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:42:52,069 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] [2022-04-06 06:42:52,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 06:42:52,287 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 [2022-04-06 06:42:52,288 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:42:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:42:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash -806774078, now seen corresponding path program 5 times [2022-04-06 06:42:52,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:42:52,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343324069] [2022-04-06 06:42:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:42:52,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:42:52,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:42:52,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420536554] [2022-04-06 06:42:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 06:42:52,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:42:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:42:52,327 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:42:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process