/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/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 16:06:52,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 16:06:52,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 16:06:52,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 16:06:52,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 16:06:52,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 16:06:52,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 16:06:52,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 16:06:52,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 16:06:52,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 16:06:52,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 16:06:52,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 16:06:52,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 16:06:52,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 16:06:52,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 16:06:52,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 16:06:52,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 16:06:52,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 16:06:52,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 16:06:52,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 16:06:52,130 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 16:06:52,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 16:06:52,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 16:06:52,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 16:06:52,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 16:06:52,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 16:06:52,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 16:06:52,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 16:06:52,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 16:06:52,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 16:06:52,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 16:06:52,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 16:06:52,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 16:06:52,165 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 16:06:52,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 16:06:52,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 16:06:52,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 16:06:52,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 16:06:52,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 16:06:52,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 16:06:52,167 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 16:06:52,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 16:06:52,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 16:06:52,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 16:06:52,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 16:06:52,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 16:06:52,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 16:06:52,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 16:06:52,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:06:52,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 16:06:52,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 16:06:52,169 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 16:06:52,169 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 16:06:52,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 16:06:52,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 16:06:52,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 16:06:52,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 16:06:52,427 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 16:06:52,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-17 16:06:52,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf459dd1/220b2de436ee46a4a8e23ddf79aceadb/FLAG7a719bebb [2022-03-17 16:06:52,867 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 16:06:52,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-17 16:06:52,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf459dd1/220b2de436ee46a4a8e23ddf79aceadb/FLAG7a719bebb [2022-03-17 16:06:52,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf459dd1/220b2de436ee46a4a8e23ddf79aceadb [2022-03-17 16:06:52,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 16:06:52,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 16:06:52,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 16:06:52,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 16:06:52,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 16:06:52,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:06:52" (1/1) ... [2022-03-17 16:06:52,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55af3cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:52, skipping insertion in model container [2022-03-17 16:06:52,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:06:52" (1/1) ... [2022-03-17 16:06:52,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 16:06:52,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 16:06:53,055 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/bresenham-ll_unwindbound5.c[597,610] [2022-03-17 16:06:53,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:06:53,080 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 16:06:53,088 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/bresenham-ll_unwindbound5.c[597,610] [2022-03-17 16:06:53,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:06:53,105 INFO L208 MainTranslator]: Completed translation [2022-03-17 16:06:53,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53 WrapperNode [2022-03-17 16:06:53,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 16:06:53,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 16:06:53,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 16:06:53,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 16:06:53,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 16:06:53,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 16:06:53,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 16:06:53,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 16:06:53,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:06:53,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:06:53,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 16:06:53,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 16:06:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 16:06:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 16:06:53,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 16:06:53,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 16:06:53,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 16:06:53,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 16:06:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 16:06:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 16:06:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 16:06:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 16:06:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 16:06:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 16:06:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 16:06:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 16:06:53,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 16:06:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 16:06:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 16:06:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 16:06:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 16:06:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 16:06:53,304 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 16:06:53,305 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 16:06:53,478 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 16:06:53,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 16:06:53,491 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 16:06:53,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:06:53 BoogieIcfgContainer [2022-03-17 16:06:53,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 16:06:53,494 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 16:06:53,494 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 16:06:53,495 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 16:06:53,497 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:06:53" (1/1) ... [2022-03-17 16:06:53,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:06:53 BasicIcfg [2022-03-17 16:06:53,513 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 16:06:53,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 16:06:53,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 16:06:53,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 16:06:53,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 04:06:52" (1/4) ... [2022-03-17 16:06:53,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344f7281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:06:53, skipping insertion in model container [2022-03-17 16:06:53,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:06:53" (2/4) ... [2022-03-17 16:06:53,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344f7281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:06:53, skipping insertion in model container [2022-03-17 16:06:53,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:06:53" (3/4) ... [2022-03-17 16:06:53,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344f7281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:06:53, skipping insertion in model container [2022-03-17 16:06:53,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:06:53" (4/4) ... [2022-03-17 16:06:53,520 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.cJordan [2022-03-17 16:06:53,525 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 16:06:53,525 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 16:06:53,560 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 16:06:53,566 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 16:06:53,566 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 16:06:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:06:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 16:06:53,586 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:06:53,586 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:06:53,587 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:06:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:06:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-03-17 16:06:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:06:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575960459] [2022-03-17 16:06:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:06:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:53,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:06:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:06:53,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:06:53,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575960459] [2022-03-17 16:06:53,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575960459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:06:53,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:06:53,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:06:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567436015] [2022-03-17 16:06:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:06:53,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:06:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:06:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:06:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:06:53,790 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:06:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:06:53,842 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-17 16:06:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:06:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 16:06:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:06:53,851 INFO L225 Difference]: With dead ends: 26 [2022-03-17 16:06:53,851 INFO L226 Difference]: Without dead ends: 21 [2022-03-17 16:06:53,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:06:53,855 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:06:53,857 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:06:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-17 16:06:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-17 16:06:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 16:06:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-17 16:06:53,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-17 16:06:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:06:53,886 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-17 16:06:53,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:06:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-17 16:06:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 16:06:53,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:06:53,887 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:06:53,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 16:06:53,887 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:06:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:06:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-03-17 16:06:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:06:53,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152333498] [2022-03-17 16:06:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:06:53,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:06:53,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330292349] [2022-03-17 16:06:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:53,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:53,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:06:53,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:06:53,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 16:06:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 16:06:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:06:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:06:54,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:06:54,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:06:54,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152333498] [2022-03-17 16:06:54,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:06:54,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330292349] [2022-03-17 16:06:54,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330292349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:06:54,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:06:54,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 16:06:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205912953] [2022-03-17 16:06:54,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:06:54,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 16:06:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:06:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 16:06:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:06:54,176 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:06:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:06:54,253 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-03-17 16:06:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:06:54,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 16:06:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:06:54,255 INFO L225 Difference]: With dead ends: 32 [2022-03-17 16:06:54,255 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 16:06:54,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:06:54,257 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:06:54,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:06:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 16:06:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-17 16:06:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:06:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-17 16:06:54,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-17 16:06:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:06:54,264 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-17 16:06:54,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 16:06:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-17 16:06:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 16:06:54,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:06:54,265 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:06:54,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 16:06:54,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:54,491 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:06:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:06:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-03-17 16:06:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:06:54,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636870722] [2022-03-17 16:06:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:06:54,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:06:54,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285168306] [2022-03-17 16:06:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:54,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:06:54,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:06:54,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 16:06:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 16:06:54,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:06:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:06:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:06:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 16:06:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:06:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636870722] [2022-03-17 16:06:54,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:06:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285168306] [2022-03-17 16:06:54,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285168306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:06:54,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:06:54,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-17 16:06:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913461114] [2022-03-17 16:06:54,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:06:54,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 16:06:54,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:06:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 16:06:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:06:54,954 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:06:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:06:55,223 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-03-17 16:06:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 16:06:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-03-17 16:06:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:06:55,224 INFO L225 Difference]: With dead ends: 43 [2022-03-17 16:06:55,225 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 16:06:55,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-17 16:06:55,226 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 16:06:55,226 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 121 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 16:06:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 16:06:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-17 16:06:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:06:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-17 16:06:55,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-03-17 16:06:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:06:55,237 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-17 16:06:55,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 16:06:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-17 16:06:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 16:06:55,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:06:55,240 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:06:55,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 16:06:55,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 16:06:55,448 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:06:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:06:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-03-17 16:06:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:06:55,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032812081] [2022-03-17 16:06:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:06:55,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:06:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642401353] [2022-03-17 16:06:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:06:55,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:06:55,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 16:06:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:55,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:06:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:06:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:06:55,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:06:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 16:06:55,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:06:55,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032812081] [2022-03-17 16:06:55,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:06:55,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642401353] [2022-03-17 16:06:55,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642401353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:06:55,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:06:55,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 16:06:55,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121370615] [2022-03-17 16:06:55,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:06:55,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:06:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:06:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:06:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:06:55,724 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 16:06:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:06:55,800 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-03-17 16:06:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 16:06:55,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-17 16:06:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:06:55,806 INFO L225 Difference]: With dead ends: 71 [2022-03-17 16:06:55,806 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 16:06:55,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:06:55,810 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:06:55,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:06:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 16:06:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-03-17 16:06:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 16:06:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-17 16:06:55,821 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-03-17 16:06:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:06:55,821 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-17 16:06:55,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 16:06:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-17 16:06:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 16:06:55,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:06:55,823 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:06:55,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 16:06:56,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:56,028 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:06:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:06:56,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-03-17 16:06:56,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:06:56,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283672803] [2022-03-17 16:06:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:56,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:06:56,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:06:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339729858] [2022-03-17 16:06:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:56,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:06:56,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:06:56,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 16:06:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:56,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 16:06:56,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:06:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 16:06:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:06:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 16:06:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:06:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283672803] [2022-03-17 16:06:57,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:06:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339729858] [2022-03-17 16:06:57,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339729858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:06:57,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:06:57,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-17 16:06:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841767628] [2022-03-17 16:06:57,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:06:57,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 16:06:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:06:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 16:06:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-17 16:06:57,015 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 16:06:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:06:57,614 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-03-17 16:06:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 16:06:57,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-03-17 16:06:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:06:57,615 INFO L225 Difference]: With dead ends: 82 [2022-03-17 16:06:57,615 INFO L226 Difference]: Without dead ends: 76 [2022-03-17 16:06:57,616 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 16:06:57,617 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 16:06:57,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 255 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-17 16:06:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-17 16:06:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-03-17 16:06:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 16:06:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-03-17 16:06:57,625 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-03-17 16:06:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:06:57,625 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-03-17 16:06:57,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 16:06:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-03-17 16:06:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 16:06:57,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:06:57,626 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:06:57,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 16:06:57,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:57,847 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:06:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:06:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-03-17 16:06:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:06:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226823074] [2022-03-17 16:06:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:06:57,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:06:57,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721297694] [2022-03-17 16:06:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:06:57,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:06:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:06:57,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:06:57,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 16:06:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:06:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 16:06:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:06:58,080 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 16:06:58,083 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 16:07:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-17 16:07:00,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:07:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-17 16:07:00,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:07:00,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226823074] [2022-03-17 16:07:00,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:07:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721297694] [2022-03-17 16:07:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721297694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:07:00,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:07:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-17 16:07:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572559693] [2022-03-17 16:07:00,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:07:00,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 16:07:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:07:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 16:07:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2022-03-17 16:07:00,926 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 16:07:03,122 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 [] [2022-03-17 16:07:07,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:07:09,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 16:07:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:07:11,522 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2022-03-17 16:07:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 16:07:11,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-03-17 16:07:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:07:11,524 INFO L225 Difference]: With dead ends: 94 [2022-03-17 16:07:11,524 INFO L226 Difference]: Without dead ends: 90 [2022-03-17 16:07:11,524 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2022-03-17 16:07:11,525 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-17 16:07:11,525 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-03-17 16:07:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-17 16:07:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-17 16:07:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 16:07:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-03-17 16:07:11,533 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-03-17 16:07:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:07:11,533 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-03-17 16:07:11,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 16:07:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-03-17 16:07:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 16:07:11,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:07:11,535 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:07:11,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 16:07:11,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:07:11,736 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:07:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:07:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-03-17 16:07:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:07:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083930291] [2022-03-17 16:07:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:07:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:07:11,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:07:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621184106] [2022-03-17 16:07:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:07:11,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:07:11,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:07:11,750 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:07:11,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 16:07:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:07:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 16:07:11,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:07:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 16:07:12,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:07:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 16:07:12,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:07:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083930291] [2022-03-17 16:07:12,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:07:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621184106] [2022-03-17 16:07:12,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621184106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:07:12,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:07:12,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-17 16:07:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736030725] [2022-03-17 16:07:12,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:07:12,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 16:07:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:07:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 16:07:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 16:07:12,202 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 16:07:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:07:12,358 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-03-17 16:07:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 16:07:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-03-17 16:07:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:07:12,359 INFO L225 Difference]: With dead ends: 91 [2022-03-17 16:07:12,359 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 16:07:12,359 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-17 16:07:12,360 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:07:12,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:07:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 16:07:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-03-17 16:07:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:07:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-03-17 16:07:12,366 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-03-17 16:07:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:07:12,366 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-03-17 16:07:12,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 16:07:12,366 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-03-17 16:07:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 16:07:12,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:07:12,374 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:07:12,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 16:07:12,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:07:12,575 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:07:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:07:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-03-17 16:07:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:07:12,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264539289] [2022-03-17 16:07:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:07:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:07:12,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:07:12,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077047956] [2022-03-17 16:07:12,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:07:12,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:07:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:07:12,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:07:12,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 16:07:12,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 16:07:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:07:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 16:07:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:07:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 16:07:12,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:07:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 16:07:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:07:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264539289] [2022-03-17 16:07:13,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:07:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077047956] [2022-03-17 16:07:13,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077047956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:07:13,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:07:13,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 16:07:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027302332] [2022-03-17 16:07:13,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:07:13,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 16:07:13,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:07:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 16:07:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-17 16:07:13,076 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:07:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:07:13,244 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-03-17 16:07:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 16:07:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-03-17 16:07:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:07:13,246 INFO L225 Difference]: With dead ends: 102 [2022-03-17 16:07:13,246 INFO L226 Difference]: Without dead ends: 102 [2022-03-17 16:07:13,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-17 16:07:13,247 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:07:13,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 179 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:07:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-17 16:07:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-03-17 16:07:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 16:07:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-03-17 16:07:13,254 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-03-17 16:07:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:07:13,254 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-03-17 16:07:13,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:07:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-03-17 16:07:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 16:07:13,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:07:13,255 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:07:13,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 16:07:13,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:07:13,459 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:07:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:07:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-03-17 16:07:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:07:13,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427028949] [2022-03-17 16:07:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:07:13,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:07:13,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:07:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385928204] [2022-03-17 16:07:13,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 16:07:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:07:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:07:13,471 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:07:13,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 16:07:14,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 16:07:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:07:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 16:07:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:07:14,277 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 16:07:14,282 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 16:07:14,284 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 16:07:20,458 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false