/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/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 07:18:21,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 07:18:21,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 07:18:21,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 07:18:21,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 07:18:21,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 07:18:21,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 07:18:21,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 07:18:21,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 07:18:21,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 07:18:21,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 07:18:21,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 07:18:21,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 07:18:21,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 07:18:21,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 07:18:21,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 07:18:21,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 07:18:21,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 07:18:21,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 07:18:21,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 07:18:21,550 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 07:18:21,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 07:18:21,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 07:18:21,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 07:18:21,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 07:18:21,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 07:18:21,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 07:18:21,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 07:18:21,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 07:18:21,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 07:18:21,576 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 07:18:21,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 07:18:21,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 07:18:21,577 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 07:18:21,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 07:18:21,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 07:18:21,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 07:18:21,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 07:18:21,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 07:18:21,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 07:18:21,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 07:18:21,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 07:18:21,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:18:21,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 07:18:21,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 07:18:21,580 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 07:18:21,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 07:18:21,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 07:18:21,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 07:18:21,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 07:18:21,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 07:18:21,754 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 07:18:21,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-04-06 07:18:21,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fab3f9f91/1a18a2a6e2c24897bb185c6eccf768fd/FLAG03e28e254 [2022-04-06 07:18:22,144 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 07:18:22,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-04-06 07:18:22,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fab3f9f91/1a18a2a6e2c24897bb185c6eccf768fd/FLAG03e28e254 [2022-04-06 07:18:22,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fab3f9f91/1a18a2a6e2c24897bb185c6eccf768fd [2022-04-06 07:18:22,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 07:18:22,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 07:18:22,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 07:18:22,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 07:18:22,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 07:18:22,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee16fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22, skipping insertion in model container [2022-04-06 07:18:22,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 07:18:22,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 07:18:22,333 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/hard-u_valuebound1.c[537,550] [2022-04-06 07:18:22,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:18:22,359 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 07:18:22,370 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/hard-u_valuebound1.c[537,550] [2022-04-06 07:18:22,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:18:22,387 INFO L208 MainTranslator]: Completed translation [2022-04-06 07:18:22,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22 WrapperNode [2022-04-06 07:18:22,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 07:18:22,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 07:18:22,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 07:18:22,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 07:18:22,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 07:18:22,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 07:18:22,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 07:18:22,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 07:18:22,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:18:22,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:22,443 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 07:18:22,450 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 07:18:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 07:18:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 07:18:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 07:18:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 07:18:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 07:18:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 07:18:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 07:18:22,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 07:18:22,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 07:18:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 07:18:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 07:18:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 07:18:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 07:18:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 07:18:22,530 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 07:18:22,531 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 07:18:22,647 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 07:18:22,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 07:18:22,664 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 07:18:22,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:18:22 BoogieIcfgContainer [2022-04-06 07:18:22,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 07:18:22,666 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 07:18:22,666 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 07:18:22,668 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 07:18:22,671 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:18:22" (1/1) ... [2022-04-06 07:18:22,673 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 07:18:22,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:18:22 BasicIcfg [2022-04-06 07:18:22,696 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 07:18:22,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 07:18:22,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 07:18:22,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 07:18:22,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:18:22" (1/4) ... [2022-04-06 07:18:22,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7001c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:18:22, skipping insertion in model container [2022-04-06 07:18:22,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:22" (2/4) ... [2022-04-06 07:18:22,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7001c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:18:22, skipping insertion in model container [2022-04-06 07:18:22,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:18:22" (3/4) ... [2022-04-06 07:18:22,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7001c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:18:22, skipping insertion in model container [2022-04-06 07:18:22,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:18:22" (4/4) ... [2022-04-06 07:18:22,702 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.cJordan [2022-04-06 07:18:22,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 07:18:22,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 07:18:22,740 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 07:18:22,746 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 07:18:22,746 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 07:18:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 07:18:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:18:22,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:22,766 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:22,767 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:22,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-04-06 07:18:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:22,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932838044] [2022-04-06 07:18:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:22,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:18:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:18:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:22,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:18:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:22,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:18:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:18:22,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932838044] [2022-04-06 07:18:22,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932838044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:22,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:22,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 07:18:22,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059120061] [2022-04-06 07:18:22,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:22,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 07:18:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:22,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 07:18:22,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:18:22,941 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 07:18:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:23,009 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-06 07:18:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 07:18:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 07:18:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:23,015 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:18:23,015 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 07:18:23,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 07:18:23,020 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:23,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:18:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 07:18:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 07:18:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:18:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-04-06 07:18:23,045 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-04-06 07:18:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:23,045 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-04-06 07:18:23,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 07:18:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-04-06 07:18:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:18:23,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:23,046 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:23,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 07:18:23,047 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-04-06 07:18:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:23,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079249393] [2022-04-06 07:18:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:18:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:18:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:18:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:18:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:18:23,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079249393] [2022-04-06 07:18:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079249393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:23,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:23,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:18:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295603559] [2022-04-06 07:18:23,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:23,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:23,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:18:23,206 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 07:18:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:23,381 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-04-06 07:18:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:18:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 07:18:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:23,384 INFO L225 Difference]: With dead ends: 44 [2022-04-06 07:18:23,386 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 07:18:23,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:18:23,393 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:23,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:18:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 07:18:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 07:18:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:18:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 07:18:23,400 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-04-06 07:18:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:23,400 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 07:18:23,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 07:18:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 07:18:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 07:18:23,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:23,418 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:23,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 07:18:23,418 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-04-06 07:18:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393745842] [2022-04-06 07:18:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:23,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:18:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:18:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:18:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:18:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 07:18:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:18:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393745842] [2022-04-06 07:18:23,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393745842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:23,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:23,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:18:23,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762752370] [2022-04-06 07:18:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:23,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:18:23,587 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 07:18:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:23,741 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-04-06 07:18:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:18:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 07:18:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:23,745 INFO L225 Difference]: With dead ends: 48 [2022-04-06 07:18:23,745 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 07:18:23,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:18:23,752 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:23,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:18:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 07:18:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-04-06 07:18:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:18:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-04-06 07:18:23,764 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-04-06 07:18:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:23,765 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-04-06 07:18:23,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 07:18:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-04-06 07:18:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 07:18:23,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:23,766 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:23,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 07:18:23,766 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-04-06 07:18:23,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:23,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080812657] [2022-04-06 07:18:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:23,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:23,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828126621] [2022-04-06 07:18:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:23,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:23,812 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 07:18:23,814 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 07:18:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:18:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 07:18:24,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:18:24,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:24,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080812657] [2022-04-06 07:18:24,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:24,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828126621] [2022-04-06 07:18:24,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828126621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:24,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:24,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:18:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774955004] [2022-04-06 07:18:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:24,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:18:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:18:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:18:24,065 INFO L87 Difference]: Start difference. First operand 41 states and 49 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, (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 07:18:26,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 07:18:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:26,229 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-04-06 07:18:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:18:26,229 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, (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 38 [2022-04-06 07:18:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:26,230 INFO L225 Difference]: With dead ends: 56 [2022-04-06 07:18:26,230 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 07:18:26,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 07:18:26,231 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:26,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 07:18:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 07:18:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 07:18:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 07:18:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-04-06 07:18:26,238 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-04-06 07:18:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:26,238 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-04-06 07:18:26,238 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, (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 07:18:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-04-06 07:18:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 07:18:26,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:26,239 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:26,255 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 07:18:26,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:26,448 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-04-06 07:18:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:26,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753772168] [2022-04-06 07:18:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:26,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:26,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315626724] [2022-04-06 07:18:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:26,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:26,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:26,477 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 07:18:26,478 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 07:18:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:26,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 07:18:26,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 07:18:26,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:18:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 07:18:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753772168] [2022-04-06 07:18:27,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315626724] [2022-04-06 07:18:27,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315626724] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:18:27,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:18:27,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 07:18:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562844167] [2022-04-06 07:18:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:27,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:18:27,137 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 07:18:29,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:18:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:29,390 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 07:18:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:18:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-04-06 07:18:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:29,391 INFO L225 Difference]: With dead ends: 66 [2022-04-06 07:18:29,391 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 07:18:29,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:18:29,392 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:29,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 07:18:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 07:18:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-06 07:18:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 07:18:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-04-06 07:18:29,400 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-04-06 07:18:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:29,400 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-04-06 07:18:29,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 07:18:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-04-06 07:18:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 07:18:29,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:29,402 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:29,425 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 07:18:29,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:29,625 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-04-06 07:18:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:29,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922811464] [2022-04-06 07:18:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:29,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:29,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:29,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176615720] [2022-04-06 07:18:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:29,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:29,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:29,648 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 07:18:29,649 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 07:18:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 07:18:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 07:18:29,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:18:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 07:18:30,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:30,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922811464] [2022-04-06 07:18:30,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:30,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176615720] [2022-04-06 07:18:30,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176615720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:18:30,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:18:30,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 07:18:30,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846463539] [2022-04-06 07:18:30,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:18:30,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 07:18:30,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 07:18:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:18:30,159 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 07:18:32,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 07:18:35,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:18:37,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:18:39,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:18:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:39,640 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2022-04-06 07:18:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 07:18:39,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2022-04-06 07:18:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:39,642 INFO L225 Difference]: With dead ends: 87 [2022-04-06 07:18:39,642 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 07:18:39,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 07:18:39,643 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:39,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 139 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 194 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2022-04-06 07:18:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 07:18:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-04-06 07:18:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 50 states have internal predecessors, (56), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 07:18:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-04-06 07:18:39,657 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 55 [2022-04-06 07:18:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:39,657 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-04-06 07:18:39,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 07:18:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-04-06 07:18:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 07:18:39,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:39,658 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:39,667 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 07:18:39,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:39,859 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:39,860 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-04-06 07:18:39,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:39,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063491663] [2022-04-06 07:18:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:39,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:39,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:39,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127839714] [2022-04-06 07:18:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:39,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:39,888 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 07:18:39,889 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 07:18:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:39,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 07:18:39,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 07:18:40,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:18:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 07:18:41,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063491663] [2022-04-06 07:18:41,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127839714] [2022-04-06 07:18:41,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127839714] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:18:41,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:18:41,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 07:18:41,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577722524] [2022-04-06 07:18:41,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:41,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:18:41,427 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 07:18:43,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:18:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:44,121 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-04-06 07:18:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:18:44,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-04-06 07:18:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:44,123 INFO L225 Difference]: With dead ends: 88 [2022-04-06 07:18:44,123 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 07:18:44,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:18:44,124 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:44,125 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 177 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 07:18:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 07:18:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 07:18:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 07:18:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-04-06 07:18:44,132 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-04-06 07:18:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:44,132 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-04-06 07:18:44,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 07:18:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-04-06 07:18:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 07:18:44,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:44,133 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:44,151 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 07:18:44,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:44,339 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2022-04-06 07:18:44,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:44,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467382671] [2022-04-06 07:18:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:44,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:44,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308656592] [2022-04-06 07:18:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:44,348 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 07:18:44,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process