/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:20:29,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:20:29,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:20:29,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:20:29,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:20:29,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:20:29,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:20:29,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:20:29,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:20:29,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:20:29,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:20:29,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:20:29,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:20:29,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:20:29,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:20:29,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:20:29,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:20:29,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:20:29,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:20:29,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:20:29,423 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:20:29,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:20:29,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:20:29,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:20:29,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:20:29,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:20:29,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:20:29,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:20:29,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:20:29,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:20:29,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:20:29,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:20:29,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:20:29,449 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:20:29,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:20:29,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:20:29,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:20:29,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:20:29,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:20:29,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:20:29,450 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:20:29,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:20:29,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:20:29,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:20:29,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:20:29,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:20:29,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:20:29,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:20:29,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:20:29,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:20:29,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:20:29,452 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:20:29,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:20:29,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:20:29,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:20:29,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:20:29,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:20:29,654 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:20:29,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-03-17 17:20:29,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6df8bcc6/9d9a803f1ada424db9207cee1f9faecd/FLAGb3305e9f6 [2022-03-17 17:20:30,061 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:20:30,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-03-17 17:20:30,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6df8bcc6/9d9a803f1ada424db9207cee1f9faecd/FLAGb3305e9f6 [2022-03-17 17:20:30,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6df8bcc6/9d9a803f1ada424db9207cee1f9faecd [2022-03-17 17:20:30,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:20:30,081 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:20:30,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:20:30,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:20:30,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:20:30,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23eaeba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30, skipping insertion in model container [2022-03-17 17:20:30,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:20:30,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:20:30,241 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c[537,550] [2022-03-17 17:20:30,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:20:30,265 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:20:30,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c[537,550] [2022-03-17 17:20:30,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:20:30,295 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:20:30,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30 WrapperNode [2022-03-17 17:20:30,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:20:30,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:20:30,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:20:30,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:20:30,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:20:30,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:20:30,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:20:30,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:20:30,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:20:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:30,370 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 17:20:30,414 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 17:20:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:20:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:20:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:20:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:20:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:20:30,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:20:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:20:30,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:20:30,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:20:30,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:20:30,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:20:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:20:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:20:30,475 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:20:30,476 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:20:30,577 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:20:30,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:20:30,581 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 17:20:30,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:20:30 BoogieIcfgContainer [2022-03-17 17:20:30,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:20:30,583 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:20:30,583 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:20:30,584 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:20:30,586 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:20:30" (1/1) ... [2022-03-17 17:20:30,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:20:30 BasicIcfg [2022-03-17 17:20:30,600 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:20:30,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:20:30,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:20:30,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:20:30,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:20:30" (1/4) ... [2022-03-17 17:20:30,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694fed92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:20:30, skipping insertion in model container [2022-03-17 17:20:30,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:20:30" (2/4) ... [2022-03-17 17:20:30,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694fed92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:20:30, skipping insertion in model container [2022-03-17 17:20:30,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:20:30" (3/4) ... [2022-03-17 17:20:30,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694fed92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:20:30, skipping insertion in model container [2022-03-17 17:20:30,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:20:30" (4/4) ... [2022-03-17 17:20:30,604 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.cJordan [2022-03-17 17:20:30,608 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:20:30,608 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:20:30,633 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:20:30,637 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 17:20:30,637 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:20:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:20:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 17:20:30,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:30,650 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:30,650 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:30,654 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-17 17:20:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:30,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646850182] [2022-03-17 17:20:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:20:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:30,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:20:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:30,822 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 17:20:30,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646850182] [2022-03-17 17:20:30,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646850182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:30,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:30,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:20:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343226324] [2022-03-17 17:20:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:30,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:20:30,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:20:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:20:30,853 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 17:20:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:30,950 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-17 17:20:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:20:30,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 17:20:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:30,959 INFO L225 Difference]: With dead ends: 38 [2022-03-17 17:20:30,959 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 17:20:30,960 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 17:20:30,972 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:30,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:20:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 17:20:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-17 17:20:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 17:20:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 17:20:30,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-17 17:20:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:30,995 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 17:20:30,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 17:20:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 17:20:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 17:20:30,996 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:30,996 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:30,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:20:30,997 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-17 17:20:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:30,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784789592] [2022-03-17 17:20:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:20:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:20:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,065 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 17:20:31,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:31,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784789592] [2022-03-17 17:20:31,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784789592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:31,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:31,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:20:31,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354484584] [2022-03-17 17:20:31,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:31,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:20:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:20:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:20:31,067 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 17:20:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:31,215 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-17 17:20:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 17:20:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 17:20:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:31,217 INFO L225 Difference]: With dead ends: 45 [2022-03-17 17:20:31,217 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 17:20:31,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:20:31,221 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:31,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:20:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 17:20:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-17 17:20:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 17:20:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-17 17:20:31,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-17 17:20:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:31,243 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-17 17:20:31,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 17:20:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-17 17:20:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 17:20:31,243 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:31,244 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:31,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 17:20:31,244 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-17 17:20:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:31,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038652417] [2022-03-17 17:20:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:31,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:31,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230729756] [2022-03-17 17:20:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:31,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:31,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:31,269 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 17:20:31,273 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 17:20:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:20:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:31,397 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 17:20:31,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:20:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038652417] [2022-03-17 17:20:31,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230729756] [2022-03-17 17:20:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230729756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:31,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:31,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 17:20:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14668736] [2022-03-17 17:20:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:31,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:20:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:20:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:20:31,399 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 17:20:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:31,406 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-03-17 17:20:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:20:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-17 17:20:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:31,407 INFO L225 Difference]: With dead ends: 38 [2022-03-17 17:20:31,407 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 17:20:31,408 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:20:31,408 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:31,409 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:20:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 17:20:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-17 17:20:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 17:20:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-17 17:20:31,412 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-17 17:20:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:31,412 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-17 17:20:31,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 17:20:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-17 17:20:31,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 17:20:31,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:31,413 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:31,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 17:20:31,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:31,627 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-17 17:20:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:31,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773140938] [2022-03-17 17:20:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:31,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:20:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:20:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-17 17:20:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 17:20:31,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:31,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773140938] [2022-03-17 17:20:31,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773140938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:31,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:31,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:20:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746755709] [2022-03-17 17:20:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:31,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:20:31,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:20:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:20:31,712 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:20:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:31,869 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-03-17 17:20:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 17:20:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 17:20:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:31,870 INFO L225 Difference]: With dead ends: 50 [2022-03-17 17:20:31,870 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 17:20:31,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:20:31,871 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:31,871 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:20:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 17:20:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-17 17:20:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 17:20:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-17 17:20:31,875 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-17 17:20:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:31,875 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-17 17:20:31,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:20:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-17 17:20:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 17:20:31,876 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:31,876 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:31,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 17:20:31,876 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-17 17:20:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:31,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34051287] [2022-03-17 17:20:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:31,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343650858] [2022-03-17 17:20:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:31,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:31,908 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 17:20:31,911 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 17:20:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:31,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:20:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:20:32,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:20:32,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34051287] [2022-03-17 17:20:32,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343650858] [2022-03-17 17:20:32,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343650858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:32,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:32,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:20:32,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207233539] [2022-03-17 17:20:32,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:32,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:20:32,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:20:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:20:32,061 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:20:34,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 17:20:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:34,260 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-17 17:20:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:20:34,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 17:20:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:34,262 INFO L225 Difference]: With dead ends: 57 [2022-03-17 17:20:34,262 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 17:20:34,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:20:34,263 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:34,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 17:20:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 17:20:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-17 17:20:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 17:20:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-17 17:20:34,267 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-17 17:20:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:34,268 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-17 17:20:34,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:20:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-17 17:20:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 17:20:34,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:34,269 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:34,287 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 17:20:34,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:34,481 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-17 17:20:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:34,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641115874] [2022-03-17 17:20:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:34,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:34,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231450633] [2022-03-17 17:20:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:34,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:34,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:34,493 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 17:20:34,494 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 17:20:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:20:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:20:34,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:20:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:34,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641115874] [2022-03-17 17:20:34,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231450633] [2022-03-17 17:20:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231450633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:34,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:20:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358873574] [2022-03-17 17:20:34,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:34,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:20:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:20:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:20:34,617 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 17:20:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:34,639 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-03-17 17:20:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:20:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-17 17:20:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:34,640 INFO L225 Difference]: With dead ends: 69 [2022-03-17 17:20:34,641 INFO L226 Difference]: Without dead ends: 69 [2022-03-17 17:20:34,641 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:20:34,641 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:34,642 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:20:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-17 17:20:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-17 17:20:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 17:20:34,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-03-17 17:20:34,646 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-03-17 17:20:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:34,646 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-03-17 17:20:34,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 17:20:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-03-17 17:20:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 17:20:34,647 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:34,647 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:34,663 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 17:20:34,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:34,856 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:34,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-17 17:20:34,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:34,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297713875] [2022-03-17 17:20:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:34,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:34,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554526197] [2022-03-17 17:20:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:34,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:34,883 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 17:20:34,895 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 17:20:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:34,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 17:20:34,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:20:35,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:20:35,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297713875] [2022-03-17 17:20:35,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:35,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554526197] [2022-03-17 17:20:35,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554526197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:20:35,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:20:35,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:20:35,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71808566] [2022-03-17 17:20:35,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:35,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:20:35,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:35,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:20:35,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:20:35,098 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:20:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:35,215 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-03-17 17:20:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:20:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-17 17:20:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:35,216 INFO L225 Difference]: With dead ends: 80 [2022-03-17 17:20:35,216 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 17:20:35,216 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:20:35,217 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:35,217 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:20:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 17:20:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-17 17:20:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 17:20:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-03-17 17:20:35,221 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-03-17 17:20:35,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:35,222 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-03-17 17:20:35,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:20:35,222 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-03-17 17:20:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 17:20:35,222 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:35,223 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:35,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 17:20:35,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:35,431 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-17 17:20:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:35,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722271797] [2022-03-17 17:20:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:35,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681154739] [2022-03-17 17:20:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:35,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:35,441 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 17:20:35,442 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 17:20:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:20:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:20:35,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:20:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:20:35,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:35,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722271797] [2022-03-17 17:20:35,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:35,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681154739] [2022-03-17 17:20:35,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681154739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:20:35,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:20:35,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 17:20:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155275612] [2022-03-17 17:20:35,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:20:35,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 17:20:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 17:20:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:20:35,665 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 17:20:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:35,769 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2022-03-17 17:20:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:20:35,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-17 17:20:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:35,772 INFO L225 Difference]: With dead ends: 146 [2022-03-17 17:20:35,772 INFO L226 Difference]: Without dead ends: 146 [2022-03-17 17:20:35,772 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 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 17:20:35,772 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:35,772 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 248 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:20:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-17 17:20:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-17 17:20:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 17:20:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-03-17 17:20:35,781 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-03-17 17:20:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:35,781 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-03-17 17:20:35,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 17:20:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-03-17 17:20:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-17 17:20:35,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:35,782 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:35,800 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 17:20:35,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:35,997 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-17 17:20:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:35,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602676812] [2022-03-17 17:20:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:36,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:36,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372132430] [2022-03-17 17:20:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:36,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:36,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:36,020 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 17:20:36,025 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 17:20:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 17:20:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 17:20:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:20:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 17:20:36,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602676812] [2022-03-17 17:20:36,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372132430] [2022-03-17 17:20:36,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372132430] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:20:36,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:20:36,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 17:20:36,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696854735] [2022-03-17 17:20:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:20:36,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:20:36,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:20:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:20:36,544 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 17:20:38,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:20:40,853 WARN L534 Checker$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 17:20:42,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:20:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:43,155 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2022-03-17 17:20:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:20:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-03-17 17:20:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:43,156 INFO L225 Difference]: With dead ends: 158 [2022-03-17 17:20:43,156 INFO L226 Difference]: Without dead ends: 158 [2022-03-17 17:20:43,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:20:43,157 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:43,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-03-17 17:20:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-17 17:20:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2022-03-17 17:20:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 17:20:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-03-17 17:20:43,166 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-03-17 17:20:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:43,167 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-03-17 17:20:43,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 17:20:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-03-17 17:20:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 17:20:43,167 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:43,168 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:43,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 17:20:43,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:43,372 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-03-17 17:20:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:43,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128104058] [2022-03-17 17:20:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:43,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:43,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157830279] [2022-03-17 17:20:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:43,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:43,400 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 17:20:43,414 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 17:20:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:20:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:20:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:20:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:20:43,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:20:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 17:20:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:20:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128104058] [2022-03-17 17:20:43,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:20:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157830279] [2022-03-17 17:20:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157830279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:20:43,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:20:43,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 17:20:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002273162] [2022-03-17 17:20:43,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:20:43,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:20:43,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:20:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:20:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:20:43,698 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-17 17:20:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:20:43,863 INFO L93 Difference]: Finished difference Result 257 states and 309 transitions. [2022-03-17 17:20:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 17:20:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-03-17 17:20:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:20:43,865 INFO L225 Difference]: With dead ends: 257 [2022-03-17 17:20:43,865 INFO L226 Difference]: Without dead ends: 257 [2022-03-17 17:20:43,865 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:20:43,865 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 102 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:20:43,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 250 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:20:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-17 17:20:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-03-17 17:20:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-17 17:20:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-03-17 17:20:43,874 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-03-17 17:20:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:20:43,874 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-03-17 17:20:43,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-17 17:20:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-03-17 17:20:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 17:20:43,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:20:43,875 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:20:43,894 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 17:20:44,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:44,094 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:20:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:20:44,094 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-03-17 17:20:44,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:20:44,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516079346] [2022-03-17 17:20:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:44,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:20:44,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:20:44,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183899655] [2022-03-17 17:20:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:20:44,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:20:44,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:20:44,115 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 17:20:44,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process