/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-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 07:09:54,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 07:09:54,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 07:09:54,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 07:09:54,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 07:09:54,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 07:09:54,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 07:09:54,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 07:09:54,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 07:09:54,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 07:09:54,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 07:09:54,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 07:09:54,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 07:09:54,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 07:09:54,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 07:09:54,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 07:09:54,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 07:09:54,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 07:09:54,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 07:09:54,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 07:09:54,898 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 07:09:54,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 07:09:54,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 07:09:54,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 07:09:54,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 07:09:54,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 07:09:54,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 07:09:54,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 07:09:54,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 07:09:54,917 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 07:09:54,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 07:09:54,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 07:09:54,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 07:09:54,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 07:09:54,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 07:09:54,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 07:09:54,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 07:09:54,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 07:09:54,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 07:09:54,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 07:09:54,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 07:09:54,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 07:09:54,929 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 07:09:54,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 07:09:54,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 07:09:54,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 07:09:54,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 07:09:54,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 07:09:54,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:09:54,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 07:09:54,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 07:09:54,931 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 07:09:54,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 07:09:55,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 07:09:55,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 07:09:55,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 07:09:55,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 07:09:55,184 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 07:09:55,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-04-06 07:09:55,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/583549681/345034a070214cc3b8dc731ce4976026/FLAG30a0c904d [2022-04-06 07:09:55,584 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 07:09:55,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-04-06 07:09:55,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/583549681/345034a070214cc3b8dc731ce4976026/FLAG30a0c904d [2022-04-06 07:09:56,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/583549681/345034a070214cc3b8dc731ce4976026 [2022-04-06 07:09:56,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 07:09:56,009 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 07:09:56,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 07:09:56,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 07:09:56,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 07:09:56,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddeb09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56, skipping insertion in model container [2022-04-06 07:09:56,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 07:09:56,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 07:09:56,163 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-ll_valuebound5.c[538,551] [2022-04-06 07:09:56,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:09:56,183 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 07:09:56,192 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-ll_valuebound5.c[538,551] [2022-04-06 07:09:56,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:09:56,208 INFO L208 MainTranslator]: Completed translation [2022-04-06 07:09:56,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56 WrapperNode [2022-04-06 07:09:56,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 07:09:56,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 07:09:56,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 07:09:56,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 07:09:56,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 07:09:56,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 07:09:56,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 07:09:56,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 07:09:56,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:09:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:09:56,284 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 07:09:56,309 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 07:09:56,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 07:09:56,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 07:09:56,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 07:09:56,333 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 07:09:56,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 07:09:56,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 07:09:56,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 07:09:56,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 07:09:56,334 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 07:09:56,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 07:09:56,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 07:09:56,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 07:09:56,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 07:09:56,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 07:09:56,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 07:09:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 07:09:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 07:09:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 07:09:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 07:09:56,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 07:09:56,412 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 07:09:56,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 07:09:56,513 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 07:09:56,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 07:09:56,519 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 07:09:56,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:09:56 BoogieIcfgContainer [2022-04-06 07:09:56,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 07:09:56,521 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 07:09:56,529 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 07:09:56,540 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 07:09:56,550 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:09:56" (1/1) ... [2022-04-06 07:09:56,552 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 07:09:56,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:09:56 BasicIcfg [2022-04-06 07:09:56,580 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 07:09:56,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 07:09:56,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 07:09:56,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 07:09:56,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:09:56" (1/4) ... [2022-04-06 07:09:56,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f95065e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:09:56, skipping insertion in model container [2022-04-06 07:09:56,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:09:56" (2/4) ... [2022-04-06 07:09:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f95065e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:09:56, skipping insertion in model container [2022-04-06 07:09:56,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:09:56" (3/4) ... [2022-04-06 07:09:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f95065e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:09:56, skipping insertion in model container [2022-04-06 07:09:56,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:09:56" (4/4) ... [2022-04-06 07:09:56,589 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.cJordan [2022-04-06 07:09:56,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 07:09:56,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 07:09:56,634 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 07:09:56,640 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 07:09:56,640 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 07:09:56,651 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 07:09:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:09:56,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:56,658 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 07:09:56,659 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:09:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:09:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-04-06 07:09:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:09:56,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030886912] [2022-04-06 07:09:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:09:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:56,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:09:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:56,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:09:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:56,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:09:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:56,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:09:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:56,851 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 07:09:56,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:09:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030886912] [2022-04-06 07:09:56,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030886912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:09:56,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:09:56,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 07:09:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827584593] [2022-04-06 07:09:56,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:09:56,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 07:09:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:09:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 07:09:56,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:09:56,880 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 07:09:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:09:56,939 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-06 07:09:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 07:09:56,942 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 07:09:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:09:56,947 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:09:56,948 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 07:09:56,949 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 07:09:56,952 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:09:56,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:09:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 07:09:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 07:09:56,980 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 07:09:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-04-06 07:09:56,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-04-06 07:09:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:09:56,982 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-04-06 07:09:56,982 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 07:09:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-04-06 07:09:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:09:56,984 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:56,984 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 07:09:56,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 07:09:56,984 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:09:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:09:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-04-06 07:09:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:09:56,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829614634] [2022-04-06 07:09:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:09:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:09:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:09:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:09:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:09:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,136 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 07:09:57,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:09:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829614634] [2022-04-06 07:09:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829614634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:09:57,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:09:57,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:09:57,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437542783] [2022-04-06 07:09:57,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:09:57,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:09:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:09:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:09:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:09:57,140 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 07:09:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:09:57,332 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-04-06 07:09:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:09:57,334 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 07:09:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:09:57,336 INFO L225 Difference]: With dead ends: 44 [2022-04-06 07:09:57,339 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 07:09:57,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:09:57,344 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 07:09:57,345 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 07:09:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 07:09:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 07:09:57,351 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 07:09:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 07:09:57,352 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-04-06 07:09:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:09:57,353 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 07:09:57,353 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 07:09:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 07:09:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 07:09:57,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:57,354 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 07:09:57,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 07:09:57,355 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:09:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:09:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-04-06 07:09:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:09:57,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776095289] [2022-04-06 07:09:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:09:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:09:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:09:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:09:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:09:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 07:09:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,498 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 07:09:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:09:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776095289] [2022-04-06 07:09:57,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776095289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:09:57,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:09:57,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:09:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026268230] [2022-04-06 07:09:57,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:09:57,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:09:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:09:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:09:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:09:57,501 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 07:09:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:09:57,675 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-04-06 07:09:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:09:57,676 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 07:09:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:09:57,679 INFO L225 Difference]: With dead ends: 48 [2022-04-06 07:09:57,679 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 07:09:57,681 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 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 07:09:57,686 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 07:09:57,688 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 07:09:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 07:09:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-04-06 07:09:57,697 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 07:09:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-04-06 07:09:57,698 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-04-06 07:09:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:09:57,698 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-04-06 07:09:57,698 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 07:09:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-04-06 07:09:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 07:09:57,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:57,699 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 07:09:57,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 07:09:57,700 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:09:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:09:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-04-06 07:09:57,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:09:57,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956373800] [2022-04-06 07:09:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:57,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:09:57,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:09:57,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367667142] [2022-04-06 07:09:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:57,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:09:57,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:09:57,731 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 07:09:57,746 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 07:09:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 07:09:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:09:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 07:09:58,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:09:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:09:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956373800] [2022-04-06 07:09:58,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:09:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367667142] [2022-04-06 07:09:58,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367667142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:09:58,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:09:58,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 07:09:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287585887] [2022-04-06 07:09:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:09:58,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 07:09:58,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:09:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 07:09:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 07:09:58,095 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 07:09:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:09:58,228 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-04-06 07:09:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 07:09:58,229 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-04-06 07:09:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:09:58,231 INFO L225 Difference]: With dead ends: 56 [2022-04-06 07:09:58,231 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 07:09:58,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:09:58,236 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:09:58,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 196 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:09:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 07:09:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 07:09:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 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 07:09:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-06 07:09:58,248 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-04-06 07:09:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:09:58,248 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-06 07:09:58,248 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 07:09:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-06 07:09:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 07:09:58,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:58,251 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 07:09:58,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 07:09:58,460 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 07:09:58,460 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:09:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:09:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-04-06 07:09:58,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:09:58,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902252540] [2022-04-06 07:09:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:58,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:09:58,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:09:58,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590770973] [2022-04-06 07:09:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:09:58,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:09:58,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 07:09:58,499 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 07:09:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 07:09:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:09:58,825 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 07:09:58,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:09:58,972 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 07:09:58,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:09:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902252540] [2022-04-06 07:09:58,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:09:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590770973] [2022-04-06 07:09:58,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590770973] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:09:58,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:09:58,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 07:09:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795231008] [2022-04-06 07:09:58,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:09:58,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:09:58,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:09:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:09:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:09:58,975 INFO L87 Difference]: Start difference. First operand 55 states and 68 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 07:09:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:09:59,041 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-04-06 07:09:59,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:09:59,041 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 07:09:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:09:59,043 INFO L225 Difference]: With dead ends: 66 [2022-04-06 07:09:59,043 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 07:09:59,043 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 07:09:59,043 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:09:59,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:09:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 07:09:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-06 07:09:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 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 07:09:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-04-06 07:09:59,051 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-04-06 07:09:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:09:59,051 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-04-06 07:09:59,051 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 07:09:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-04-06 07:09:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 07:09:59,053 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:59,053 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 07:09:59,079 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 07:09:59,267 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 07:09:59,267 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:09:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:09:59,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-04-06 07:09:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:09:59,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463701405] [2022-04-06 07:09:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:59,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:09:59,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:09:59,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985749307] [2022-04-06 07:09:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:09:59,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:09:59,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:09:59,316 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 07:09:59,318 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 07:09:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:09:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 07:09:59,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:09:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 07:09:59,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:09:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 07:09:59,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:09:59,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463701405] [2022-04-06 07:09:59,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:09:59,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985749307] [2022-04-06 07:09:59,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985749307] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:09:59,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:09:59,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 07:09:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715831391] [2022-04-06 07:09:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:09:59,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:09:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:09:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:09:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:09:59,756 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 07:09:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:09:59,922 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-04-06 07:09:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:09:59,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 55 [2022-04-06 07:09:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:09:59,924 INFO L225 Difference]: With dead ends: 74 [2022-04-06 07:09:59,924 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 07:09:59,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:09:59,925 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:09:59,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 07:09:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 07:09:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-04-06 07:09:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 07:09:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-04-06 07:09:59,932 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-04-06 07:09:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:09:59,933 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-04-06 07:09:59,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 07:09:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-04-06 07:09:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 07:09:59,934 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:09:59,934 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 07:09:59,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 07:10:00,156 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 07:10:00,156 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:10:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:10:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-04-06 07:10:00,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:10:00,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411253515] [2022-04-06 07:10:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:10:00,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:10:00,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:10:00,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120540642] [2022-04-06 07:10:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:10:00,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:10:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:10:00,168 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 07:10:00,196 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 07:10:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:10:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:10:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:10:00,354 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 07:10:00,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:10:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:10:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411253515] [2022-04-06 07:10:00,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:10:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120540642] [2022-04-06 07:10:00,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120540642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:10:00,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:10:00,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:10:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14923351] [2022-04-06 07:10:00,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:10:00,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:10:00,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:10:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:10:00,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:10:00,358 INFO L87 Difference]: Start difference. First operand 71 states and 88 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 07:10:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:10:00,407 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-04-06 07:10:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:10:00,408 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-04-06 07:10:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:10:00,410 INFO L225 Difference]: With dead ends: 77 [2022-04-06 07:10:00,410 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 07:10:00,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 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 07:10:00,411 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:10:00,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:10:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 07:10:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-04-06 07:10:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 07:10:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-04-06 07:10:00,417 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-04-06 07:10:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:10:00,418 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-04-06 07:10:00,418 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 07:10:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-04-06 07:10:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 07:10:00,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:10:00,419 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:10:00,439 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 07:10:00,635 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 07:10:00,636 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:10:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:10:00,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-04-06 07:10:00,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:10:00,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695183622] [2022-04-06 07:10:00,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:10:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:10:00,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:10:00,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975578238] [2022-04-06 07:10:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:10:00,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:10:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:10:00,647 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 07:10:00,664 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 07:10:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:10:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 07:10:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:10:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 07:10:01,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:10:37,602 WARN L232 SmtUtils]: Spent 18.93s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:11:47,211 WARN L232 SmtUtils]: Spent 25.51s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:12:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 07:12:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:12:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695183622] [2022-04-06 07:12:39,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:12:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975578238] [2022-04-06 07:12:39,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975578238] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:12:39,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:12:39,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-04-06 07:12:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060106321] [2022-04-06 07:12:39,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:12:39,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 07:12:39,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:12:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 07:12:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2022-04-06 07:12:39,138 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 07:12:40,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:12:43,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:12:45,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:12:47,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:12:48,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:12:51,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:12:53,646 WARN L534 Checker$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 07:13:06,238 WARN L232 SmtUtils]: Spent 12.49s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:13:08,572 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 07:13:12,220 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (<= c_main_~d~0 c_main_~r~0)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (mod c_main_~B~0 4294967296))) (and (let ((.cse1 (* 2 c_main_~p~0)) (.cse3 (* 2 c_main_~d~0))) (or (= .cse0 (+ (* (+ c_main_~q~0 (div .cse1 2)) .cse2) (* (- 1) (div .cse3 2)) c_main_~r~0)) (not (= (* .cse1 .cse2) .cse3)) (not .cse4) (<= .cse3 c_main_~r~0))) (or .cse4 (not (= c_main_~d~0 (* c_main_~p~0 .cse2))) (let ((.cse7 (= (mod c_main_~p~0 2) 0)) (.cse13 (div c_main_~p~0 2))) (let ((.cse9 (* (+ c_main_~q~0 .cse13) .cse2)) (.cse10 (not .cse7)) (.cse5 (* (- 1) (div c_main_~d~0 2))) (.cse6 (* (+ c_main_~q~0 .cse13 1) .cse2)) (.cse12 (= (mod c_main_~d~0 2) 0)) (.cse11 (< c_main_~d~0 0))) (and (or (let ((.cse8 (< c_main_~p~0 0))) (and (or (= .cse0 (+ c_main_~r~0 .cse5 .cse6)) .cse7 (not .cse8)) (or (= .cse0 (+ .cse9 c_main_~r~0 .cse5)) (and .cse10 .cse8)))) (and .cse11 (not .cse12))) (or (and (or (= .cse0 (+ (- 1) .cse9 c_main_~r~0 .cse5)) .cse10) (or .cse7 (= .cse0 (+ (- 1) c_main_~r~0 .cse5 .cse6)))) .cse12 (not .cse11)))))))) is different from true [2022-04-06 07:13:13,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:13:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:13:15,648 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2022-04-06 07:13:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 07:13:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-04-06 07:13:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:13:15,649 INFO L225 Difference]: With dead ends: 117 [2022-04-06 07:13:15,649 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 07:13:15,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=107, Invalid=401, Unknown=2, NotChecked=42, Total=552 [2022-04-06 07:13:15,650 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 131 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-04-06 07:13:15,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 185 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 438 Invalid, 6 Unknown, 6 Unchecked, 21.5s Time] [2022-04-06 07:13:15,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 07:13:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-04-06 07:13:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 07:13:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-04-06 07:13:15,661 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-04-06 07:13:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:13:15,661 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-04-06 07:13:15,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 07:13:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-04-06 07:13:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 07:13:15,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:13:15,663 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-04-06 07:13:15,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 07:13:15,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:15,864 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:13:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:13:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-04-06 07:13:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:13:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713811327] [2022-04-06 07:13:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:13:15,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:13:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162653356] [2022-04-06 07:13:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:15,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:15,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:13:15,874 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 07:13:15,887 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 07:13:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:13:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 07:13:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:13:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 07:13:16,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:13:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 07:13:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:13:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713811327] [2022-04-06 07:13:16,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:13:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162653356] [2022-04-06 07:13:16,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162653356] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:13:16,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:13:16,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 07:13:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377567576] [2022-04-06 07:13:16,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:13:16,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 07:13:16,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:13:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 07:13:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 07:13:16,388 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 07:13:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:13:16,943 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2022-04-06 07:13:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:13:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-04-06 07:13:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:13:16,944 INFO L225 Difference]: With dead ends: 114 [2022-04-06 07:13:16,944 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 07:13:16,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:13:16,945 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 07:13:16,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 205 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 07:13:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 07:13:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-04-06 07:13:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 07:13:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-04-06 07:13:16,952 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-04-06 07:13:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:13:16,953 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-04-06 07:13:16,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 07:13:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-04-06 07:13:16,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 07:13:16,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:13:16,954 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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 07:13:16,974 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 07:13:17,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:17,164 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:13:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:13:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1406960063, now seen corresponding path program 2 times [2022-04-06 07:13:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:13:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493793768] [2022-04-06 07:13:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:13:17,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:13:17,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335544118] [2022-04-06 07:13:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 07:13:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:13:17,173 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 07:13:17,174 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 07:13:17,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 07:13:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 07:13:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:13:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:13:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 07:13:17,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:13:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 07:13:17,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:13:17,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493793768] [2022-04-06 07:13:17,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:13:17,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335544118] [2022-04-06 07:13:17,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335544118] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:13:17,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:13:17,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-04-06 07:13:17,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129088083] [2022-04-06 07:13:17,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:13:17,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:13:17,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:13:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:13:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:13:17,517 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-04-06 07:13:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:13:17,585 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-04-06 07:13:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 07:13:17,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-04-06 07:13:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:13:17,587 INFO L225 Difference]: With dead ends: 111 [2022-04-06 07:13:17,587 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 07:13:17,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:13:17,588 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:13:17,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:13:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 07:13:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-04-06 07:13:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 07:13:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-04-06 07:13:17,596 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-04-06 07:13:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:13:17,596 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-04-06 07:13:17,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-04-06 07:13:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-04-06 07:13:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 07:13:17,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:13:17,597 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 07:13:17,624 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 07:13:17,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:17,820 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:13:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:13:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-04-06 07:13:17,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:13:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462894178] [2022-04-06 07:13:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:17,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:13:17,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:13:17,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329414555] [2022-04-06 07:13:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:17,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:13:17,840 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 07:13:17,842 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 07:13:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:13:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 07:13:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:13:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 07:13:18,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:13:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 07:13:18,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:13:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462894178] [2022-04-06 07:13:18,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:13:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329414555] [2022-04-06 07:13:18,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329414555] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:13:18,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:13:18,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 07:13:18,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262820185] [2022-04-06 07:13:18,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:13:18,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 07:13:18,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:13:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 07:13:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:13:18,531 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-04-06 07:13:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:13:18,849 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-04-06 07:13:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 07:13:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-04-06 07:13:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:13:18,850 INFO L225 Difference]: With dead ends: 117 [2022-04-06 07:13:18,850 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 07:13:18,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 07:13:18,851 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 07:13:18,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 331 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 07:13:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 07:13:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 07:13:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 07:13:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-04-06 07:13:18,858 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-04-06 07:13:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:13:18,858 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-04-06 07:13:18,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-04-06 07:13:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-04-06 07:13:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 07:13:18,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:13:18,859 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-04-06 07:13:18,884 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 07:13:19,071 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,SelfDestructingSolverStorable10 [2022-04-06 07:13:19,071 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:13:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:13:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1871497790, now seen corresponding path program 1 times [2022-04-06 07:13:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:13:19,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553694283] [2022-04-06 07:13:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:13:19,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:13:19,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754617684] [2022-04-06 07:13:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:19,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:19,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:13:19,080 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 07:13:19,081 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 07:13:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:13:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 07:13:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:13:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-04-06 07:13:19,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:13:19,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:13:19,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553694283] [2022-04-06 07:13:19,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:13:19,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754617684] [2022-04-06 07:13:19,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754617684] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:13:19,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:13:19,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:13:19,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278901007] [2022-04-06 07:13:19,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:13:19,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:13:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:13:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:13:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:13:19,286 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 07:13:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:13:19,336 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-04-06 07:13:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:13:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-04-06 07:13:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:13:19,338 INFO L225 Difference]: With dead ends: 104 [2022-04-06 07:13:19,338 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 07:13:19,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:13:19,339 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:13:19,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:13:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 07:13:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 07:13:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 07:13:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-04-06 07:13:19,353 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-04-06 07:13:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:13:19,354 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-04-06 07:13:19,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 07:13:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-04-06 07:13:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 07:13:19,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:13:19,356 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 07:13:19,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 07:13:19,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:19,571 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:13:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:13:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2022-04-06 07:13:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:13:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89078071] [2022-04-06 07:13:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:13:19,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:13:19,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:13:19,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032666357] [2022-04-06 07:13:19,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 07:13:19,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:13:19,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:13:19,582 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 07:13:19,583 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 07:13:19,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 07:13:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 07:13:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 07:13:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:13:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-04-06 07:13:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:13:51,961 WARN L232 SmtUtils]: Spent 17.42s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:15:07,379 WARN L232 SmtUtils]: Spent 17.17s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:15:42,831 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse8 (mod c_main_~B~0 4294967296)) (.cse19 (div c_main_~p~0 2)) (.cse21 (< c_main_~d~0 0)) (.cse4 (= (mod c_main_~d~0 2) 0)) (.cse2 (div c_main_~d~0 2))) (let ((.cse3 (+ .cse2 1)) (.cse0 (and .cse21 (not .cse4))) (.cse13 (mod c_main_~A~0 4294967296)) (.cse9 (* .cse8 .cse19)) (.cse5 (= (mod c_main_~p~0 2) 0)) (.cse6 (< c_main_~p~0 0))) (and (let ((.cse20 (+ .cse19 1))) (let ((.cse1 (* .cse20 .cse8))) (or (and (or .cse0 (not (= .cse1 .cse2))) (or (not (= .cse3 .cse1)) .cse4)) .cse5 (not .cse6) (let ((.cse18 (div .cse20 2)) (.cse14 (= (mod .cse20 2) 0))) (let ((.cse15 (not .cse14)) (.cse16 (* (+ c_main_~q~0 .cse18 .cse19 1) .cse8)) (.cse10 (* (- 1) (div .cse1 2))) (.cse11 (* .cse8 (+ c_main_~q~0 .cse18 2 .cse19))) (.cse12 (* (- 1) .cse1)) (.cse7 (div (+ .cse8 .cse9) 2)) (.cse17 (= (mod .cse1 2) 0))) (and (or (not (<= (+ .cse7 .cse8 .cse9 1) c_main_~r~0)) (and (or (= (+ (- 1) .cse10 .cse11 c_main_~r~0 .cse12) .cse13) .cse14) (or .cse15 (= (+ (- 1) .cse10 c_main_~r~0 .cse16 .cse12) .cse13))) .cse17) (or (and (or .cse15 (= .cse13 (+ .cse10 c_main_~r~0 .cse16 .cse12))) (or (= .cse13 (+ .cse10 .cse11 c_main_~r~0 .cse12)) .cse14)) (not (<= (+ .cse7 .cse8 .cse9) c_main_~r~0)) (not .cse17)))))))) (or (and (or (not (= .cse3 .cse9)) .cse4 (not .cse21)) (or .cse0 (not (= .cse2 .cse9)))) (let ((.cse30 (= (mod .cse19 2) 0)) (.cse22 (div .cse9 2)) (.cse32 (div .cse19 2))) (let ((.cse31 (* .cse8 (+ c_main_~q~0 .cse19 .cse32 1))) (.cse27 (* (- 1) .cse22)) (.cse28 (* (- 1) .cse9)) (.cse29 (* .cse8 (+ c_main_~q~0 .cse19 .cse32))) (.cse25 (not .cse30)) (.cse23 (= (mod .cse9 2) 0)) (.cse24 (< .cse9 0))) (and (or (not (<= (+ .cse9 .cse22) c_main_~r~0)) (and (not .cse23) .cse24) (let ((.cse26 (< .cse19 0))) (and (or (and .cse25 .cse26) (= (+ .cse27 .cse28 .cse29 c_main_~r~0) .cse13)) (or (not .cse26) .cse30 (= .cse13 (+ .cse31 .cse27 .cse28 c_main_~r~0)))))) (or (and (or .cse30 (= .cse13 (+ (- 1) .cse31 .cse27 .cse28 c_main_~r~0))) (or (= (+ (- 1) .cse27 .cse28 .cse29 c_main_~r~0) .cse13) .cse25)) .cse23 (not (<= (+ .cse9 1 .cse22) c_main_~r~0)) (not .cse24))))) (and (not .cse5) .cse6))))) is different from false [2022-04-06 07:21:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 61 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 16 not checked. [2022-04-06 07:21:03,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:21:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89078071] [2022-04-06 07:21:03,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:21:03,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032666357] [2022-04-06 07:21:03,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032666357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:21:03,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:21:03,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 07:21:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805566828] [2022-04-06 07:21:03,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:21:03,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 07:21:03,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:21:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 07:21:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=415, Unknown=2, NotChecked=42, Total=552 [2022-04-06 07:21:03,645 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-04-06 07:21:30,569 WARN L232 SmtUtils]: Spent 23.17s on a formula simplification. DAG size of input: 200 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:21:36,271 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 07:21:46,786 WARN L232 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 99 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:21:48,858 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 07:21:50,924 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse8 (= (mod c_main_~d~0 2) 0)) (.cse0 (= (mod c_main_~p~0 2) 0)) (.cse38 (< c_main_~p~0 0)) (.cse14 (mod c_main_~B~0 4294967296)) (.cse24 (div c_main_~p~0 2)) (.cse37 (< c_main_~d~0 0)) (.cse12 (div c_main_~d~0 2))) (let ((.cse7 (+ .cse12 1)) (.cse9 (not .cse37)) (.cse15 (* .cse14 .cse24)) (.cse3 (* (+ c_main_~q~0 .cse24 1) .cse14)) (.cse4 (not .cse38)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse5 (* (+ c_main_~q~0 .cse24) .cse14)) (.cse2 (* (- 1) .cse12)) (.cse6 (and (not .cse0) .cse38)) (.cse10 (and .cse37 (not .cse8)))) (and (or (and (or .cse0 (= .cse1 (+ (- 1) c_main_~r~0 .cse2 .cse3)) .cse4) (or (= .cse1 (+ (- 1) .cse5 c_main_~r~0 .cse2)) .cse6)) (not (<= .cse7 c_main_~r~0)) .cse8 .cse9) (let ((.cse25 (+ .cse24 1))) (let ((.cse11 (* .cse25 .cse14))) (or (and (or .cse10 (not (= .cse11 .cse12))) (or (not (= .cse7 .cse11)) .cse8)) .cse0 .cse4 (let ((.cse23 (div .cse25 2)) (.cse19 (= (mod .cse25 2) 0))) (let ((.cse20 (not .cse19)) (.cse21 (* (+ c_main_~q~0 .cse23 .cse24 1) .cse14)) (.cse16 (* (- 1) (div .cse11 2))) (.cse17 (* .cse14 (+ c_main_~q~0 .cse23 2 .cse24))) (.cse18 (* (- 1) .cse11)) (.cse13 (div (+ .cse14 .cse15) 2)) (.cse22 (= (mod .cse11 2) 0))) (and (or (not (<= (+ .cse13 .cse14 .cse15 1) c_main_~r~0)) (and (or (= (+ (- 1) .cse16 .cse17 c_main_~r~0 .cse18) .cse1) .cse19) (or .cse20 (= (+ (- 1) .cse16 c_main_~r~0 .cse21 .cse18) .cse1))) .cse22) (or (and (or .cse20 (= .cse1 (+ .cse16 c_main_~r~0 .cse21 .cse18))) (or (= .cse1 (+ .cse16 .cse17 c_main_~r~0 .cse18)) .cse19)) (not (<= (+ .cse13 .cse14 .cse15) c_main_~r~0)) (not .cse22)))))))) (or (and (or (not (= .cse7 .cse15)) .cse8 .cse9) (or .cse10 (not (= .cse12 .cse15)))) (let ((.cse34 (= (mod .cse24 2) 0)) (.cse26 (div .cse15 2)) (.cse36 (div .cse24 2))) (let ((.cse35 (* .cse14 (+ c_main_~q~0 .cse24 .cse36 1))) (.cse31 (* (- 1) .cse26)) (.cse32 (* (- 1) .cse15)) (.cse33 (* .cse14 (+ c_main_~q~0 .cse24 .cse36))) (.cse29 (not .cse34)) (.cse27 (= (mod .cse15 2) 0)) (.cse28 (< .cse15 0))) (and (or (not (<= (+ .cse15 .cse26) c_main_~r~0)) (and (not .cse27) .cse28) (let ((.cse30 (< .cse24 0))) (and (or (and .cse29 .cse30) (= (+ .cse31 .cse32 .cse33 c_main_~r~0) .cse1)) (or (not .cse30) .cse34 (= .cse1 (+ .cse35 .cse31 .cse32 c_main_~r~0)))))) (or (and (or .cse34 (= .cse1 (+ (- 1) .cse35 .cse31 .cse32 c_main_~r~0))) (or (= (+ (- 1) .cse31 .cse32 .cse33 c_main_~r~0) .cse1) .cse29)) .cse27 (not (<= (+ .cse15 1 .cse26) c_main_~r~0)) (not .cse28))))) .cse6) (or (and (or (= .cse1 (+ c_main_~r~0 .cse2 .cse3)) .cse0 .cse4) (or (= .cse1 (+ .cse5 c_main_~r~0 .cse2)) .cse6)) .cse10 (not (<= .cse12 c_main_~r~0)))))) is different from true [2022-04-06 07:22:20,051 WARN L232 SmtUtils]: Spent 28.88s on a formula simplification. DAG size of input: 68 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:22:34,671 WARN L232 SmtUtils]: Spent 14.33s on a formula simplification. DAG size of input: 91 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:22:41,723 WARN L232 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 71 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:22:46,495 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 07:22:50,021 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (= (mod c_main_~p~0 2) 0))) (let ((.cse9 (= (mod c_main_~d~0 2) 0)) (.cse8 (not .cse6)) (.cse3 (div c_main_~d~0 2)) (.cse18 (< c_main_~p~0 0)) (.cse14 (div c_main_~p~0 2)) (.cse1 (mod c_main_~B~0 4294967296)) (.cse17 (< c_main_~d~0 0))) (let ((.cse2 (* (- 1) c_main_~d~0)) (.cse10 (not .cse17)) (.cse15 (* (+ c_main_~q~0 .cse14 1) .cse1)) (.cse12 (not .cse18)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse16 (* (+ c_main_~q~0 .cse14) .cse1)) (.cse4 (* (- 1) .cse3)) (.cse13 (and .cse8 .cse18)) (.cse11 (and .cse17 (not .cse9)))) (and (or (not (<= c_main_~d~0 c_main_~r~0)) (= .cse0 (+ (* .cse1 (+ c_main_~q~0 c_main_~p~0)) .cse2 c_main_~r~0))) (or (let ((.cse5 (* (+ c_main_~q~0 c_main_~p~0 .cse14 1) .cse1)) (.cse7 (* .cse1 (+ c_main_~q~0 c_main_~p~0 .cse14)))) (and (or (not (<= (+ c_main_~d~0 .cse3 1) c_main_~r~0)) (and (or (= .cse0 (+ (- 1) .cse2 c_main_~r~0 .cse4 .cse5)) .cse6) (or (= .cse0 (+ (- 1) .cse7 .cse2 c_main_~r~0 .cse4)) .cse8)) .cse9 .cse10) (or (not (<= (+ c_main_~d~0 .cse3) c_main_~r~0)) .cse11 (and (or (= .cse0 (+ .cse2 c_main_~r~0 .cse4 .cse5)) .cse6 .cse12) (or (= .cse0 (+ .cse7 .cse2 c_main_~r~0 .cse4)) .cse13))))) (not (= c_main_~d~0 (* c_main_~p~0 .cse1)))) (or (and (or .cse6 (= .cse0 (+ (- 1) c_main_~r~0 .cse4 .cse15)) .cse12) (or (= .cse0 (+ (- 1) .cse16 c_main_~r~0 .cse4)) .cse13)) (not (<= (+ .cse3 1) c_main_~r~0)) .cse9 .cse10) (= (+ c_main_~r~0 (* c_main_~q~0 .cse1)) .cse0) (or (and (or (= .cse0 (+ c_main_~r~0 .cse4 .cse15)) .cse6 .cse12) (or (= .cse0 (+ .cse16 c_main_~r~0 .cse4)) .cse13)) .cse11 (not (<= .cse3 c_main_~r~0))))))) is different from true [2022-04-06 07:22:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:53,788 INFO L93 Difference]: Finished difference Result 204 states and 267 transitions. [2022-04-06 07:22:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 07:22:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) Word has length 105 [2022-04-06 07:22:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:53,790 INFO L225 Difference]: With dead ends: 204 [2022-04-06 07:22:53,790 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 07:22:53,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 141.5s TimeCoverageRelationStatistics Valid=286, Invalid=1128, Unknown=4, NotChecked=222, Total=1640 [2022-04-06 07:22:53,791 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 129 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 343 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:53,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 260 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 1120 Invalid, 3 Unknown, 119 Unchecked, 20.8s Time] [2022-04-06 07:22:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 07:22:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2022-04-06 07:22:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 108 states have internal predecessors, (116), 47 states have call successors, (47), 19 states have call predecessors, (47), 18 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 07:22:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 208 transitions. [2022-04-06 07:22:53,800 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 208 transitions. Word has length 105 [2022-04-06 07:22:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:53,800 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 208 transitions. [2022-04-06 07:22:53,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-04-06 07:22:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 208 transitions. [2022-04-06 07:22:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 07:22:53,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:53,801 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:22:53,832 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 07:22:54,025 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,SelfDestructingSolverStorable12 [2022-04-06 07:22:54,026 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash 104505605, now seen corresponding path program 4 times [2022-04-06 07:22:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:54,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693376808] [2022-04-06 07:22:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:54,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:22:54,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121876317] [2022-04-06 07:22:54,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 07:22:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:54,044 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 07:22:54,045 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 07:22:54,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 07:22:54,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 07:22:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 07:22:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:22:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-04-06 07:22:54,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:23:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-04-06 07:23:12,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:23:12,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693376808] [2022-04-06 07:23:12,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:23:12,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121876317] [2022-04-06 07:23:12,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121876317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:23:12,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:23:12,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-04-06 07:23:12,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575306360] [2022-04-06 07:23:12,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:23:12,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 07:23:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:23:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 07:23:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-04-06 07:23:12,204 INFO L87 Difference]: Start difference. First operand 167 states and 208 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-04-06 07:24:09,530 WARN L232 SmtUtils]: Spent 54.91s on a formula simplification. DAG size of input: 160 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:24:11,740 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 []