/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/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 18:13:16,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 18:13:16,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 18:13:16,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 18:13:16,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 18:13:16,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 18:13:16,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 18:13:16,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 18:13:16,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 18:13:16,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 18:13:16,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 18:13:16,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 18:13:16,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 18:13:16,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 18:13:16,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 18:13:16,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 18:13:16,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 18:13:16,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 18:13:16,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 18:13:16,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 18:13:16,520 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 18:13:16,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 18:13:16,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 18:13:16,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 18:13:16,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 18:13:16,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 18:13:16,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 18:13:16,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 18:13:16,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 18:13:16,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 18:13:16,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 18:13:16,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 18:13:16,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 18:13:16,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 18:13:16,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 18:13:16,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 18:13:16,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 18:13:16,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 18:13:16,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 18:13:16,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 18:13:16,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 18:13:16,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 18:13:16,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 18:13:16,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 18:13:16,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 18:13:16,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 18:13:16,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 18:13:16,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 18:13:16,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:13:16,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 18:13:16,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 18:13:16,560 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 18:13:16,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 18:13:16,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 18:13:16,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 18:13:16,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 18:13:16,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 18:13:16,862 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 18:13:16,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-u.c [2022-03-18 18:13:16,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6641104e6/dfd11e7da7ac4642b53ced66e154246f/FLAGc18c6b06f [2022-03-18 18:13:17,320 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 18:13:17,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c [2022-03-18 18:13:17,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6641104e6/dfd11e7da7ac4642b53ced66e154246f/FLAGc18c6b06f [2022-03-18 18:13:17,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6641104e6/dfd11e7da7ac4642b53ced66e154246f [2022-03-18 18:13:17,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 18:13:17,741 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 18:13:17,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 18:13:17,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 18:13:17,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 18:13:17,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:13:17" (1/1) ... [2022-03-18 18:13:17,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a8b0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:17, skipping insertion in model container [2022-03-18 18:13:17,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:13:17" (1/1) ... [2022-03-18 18:13:17,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 18:13:17,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 18:13:17,989 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/hard-u.c[537,550] [2022-03-18 18:13:18,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:13:18,009 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 18:13:18,019 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/hard-u.c[537,550] [2022-03-18 18:13:18,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:13:18,035 INFO L208 MainTranslator]: Completed translation [2022-03-18 18:13:18,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18 WrapperNode [2022-03-18 18:13:18,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 18:13:18,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 18:13:18,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 18:13:18,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 18:13:18,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 18:13:18,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 18:13:18,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 18:13:18,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 18:13:18,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:13:18,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:13:18,114 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) [2022-03-18 18:13:18,126 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 [2022-03-18 18:13:18,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 18:13:18,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 18:13:18,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 18:13:18,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 18:13:18,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 18:13:18,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 18:13:18,174 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 18:13:18,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 18:13:18,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 18:13:18,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 18:13:18,246 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 18:13:18,247 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 18:13:18,434 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 18:13:18,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 18:13:18,439 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 18:13:18,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:13:18 BoogieIcfgContainer [2022-03-18 18:13:18,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 18:13:18,458 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 18:13:18,458 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 18:13:18,459 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 18:13:18,462 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:13:18" (1/1) ... [2022-03-18 18:13:18,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:13:18 BasicIcfg [2022-03-18 18:13:18,516 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 18:13:18,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 18:13:18,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 18:13:18,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 18:13:18,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 06:13:17" (1/4) ... [2022-03-18 18:13:18,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121eae8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:13:18, skipping insertion in model container [2022-03-18 18:13:18,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:13:18" (2/4) ... [2022-03-18 18:13:18,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121eae8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:13:18, skipping insertion in model container [2022-03-18 18:13:18,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:13:18" (3/4) ... [2022-03-18 18:13:18,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121eae8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:13:18, skipping insertion in model container [2022-03-18 18:13:18,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:13:18" (4/4) ... [2022-03-18 18:13:18,537 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.cJordan [2022-03-18 18:13:18,541 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 18:13:18,541 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 18:13:18,596 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 18:13:18,605 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 [2022-03-18 18:13:18,606 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 18:13:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-03-18 18:13:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 18:13:18,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:18,634 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:13:18,635 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:18,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-18 18:13:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884087128] [2022-03-18 18:13:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:18,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:13:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:18,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 18:13:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:13:18,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:13:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884087128] [2022-03-18 18:13:18,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884087128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:13:18,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:13:18,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 18:13:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551643362] [2022-03-18 18:13:18,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:13:18,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 18:13:18,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:13:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 18:13:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:13:18,913 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-18 18:13:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:13:19,007 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-18 18:13:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 18:13:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 17 [2022-03-18 18:13:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:13:19,016 INFO L225 Difference]: With dead ends: 35 [2022-03-18 18:13:19,020 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 18:13:19,022 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 [2022-03-18 18:13:19,027 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:13:19,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:13:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 18:13:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 18:13:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-03-18 18:13:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-18 18:13:19,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-18 18:13:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:13:19,060 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-18 18:13:19,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-03-18 18:13:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-18 18:13:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 18:13:19,061 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:19,061 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:13:19,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 18:13:19,062 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-18 18:13:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:19,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908410045] [2022-03-18 18:13:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:19,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:13:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 18:13:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:13:19,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:13:19,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908410045] [2022-03-18 18:13:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908410045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:13:19,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:13:19,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 18:13:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156632204] [2022-03-18 18:13:19,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:13:19,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:13:19,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:13:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:13:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:13:19,206 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-18 18:13:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:13:19,421 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-18 18:13:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:13:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2022-03-18 18:13:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:13:19,423 INFO L225 Difference]: With dead ends: 41 [2022-03-18 18:13:19,423 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 18:13:19,423 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 [2022-03-18 18:13:19,425 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:13:19,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:13:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 18:13:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-18 18:13:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-03-18 18:13:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-18 18:13:19,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-18 18:13:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:13:19,433 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-18 18:13:19,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-18 18:13:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-18 18:13:19,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 18:13:19,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:19,435 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] [2022-03-18 18:13:19,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 18:13:19,435 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-18 18:13:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018618023] [2022-03-18 18:13:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:13:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 18:13:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 18:13:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:13:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:13:19,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018618023] [2022-03-18 18:13:19,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018618023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:13:19,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:13:19,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 18:13:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066702660] [2022-03-18 18:13:19,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:13:19,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:13:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:13:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:13:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:13:19,552 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-03-18 18:13:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:13:19,698 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-18 18:13:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:13:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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 22 [2022-03-18 18:13:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:13:19,699 INFO L225 Difference]: With dead ends: 45 [2022-03-18 18:13:19,699 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 18:13:19,700 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 [2022-03-18 18:13:19,701 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:13:19,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:13:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 18:13:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-18 18:13:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-03-18 18:13:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-18 18:13:19,707 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-18 18:13:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:13:19,707 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-18 18:13:19,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-03-18 18:13:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-18 18:13:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 18:13:19,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:19,709 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] [2022-03-18 18:13:19,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 18:13:19,709 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-18 18:13:19,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:19,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492998945] [2022-03-18 18:13:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:19,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:19,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:13:19,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391928016] [2022-03-18 18:13:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:19,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:13:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:13:19,725 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) [2022-03-18 18:13:19,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 18:13:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 18:13:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:13:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:13:19,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:13:19,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:13:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492998945] [2022-03-18 18:13:19,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:13:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391928016] [2022-03-18 18:13:19,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391928016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:13:19,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:13:19,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 18:13:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307690441] [2022-03-18 18:13:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:13:19,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 18:13:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:13:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 18:13:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:13:19,983 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 18:13:22,061 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 [] [2022-03-18 18:13:22,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:13:22,249 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2022-03-18 18:13:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 18:13:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 18:13:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:13:22,251 INFO L225 Difference]: With dead ends: 59 [2022-03-18 18:13:22,251 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 18:13:22,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:13:22,252 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 18:13:22,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 206 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 18:13:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 18:13:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-03-18 18:13:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 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) [2022-03-18 18:13:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-18 18:13:22,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 27 [2022-03-18 18:13:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:13:22,260 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-18 18:13:22,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 18:13:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-18 18:13:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 18:13:22,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:22,262 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] [2022-03-18 18:13:22,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 18:13:22,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:13:22,484 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-18 18:13:22,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:22,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844603529] [2022-03-18 18:13:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:22,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:22,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:13:22,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196076539] [2022-03-18 18:13:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:22,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:13:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:13:22,499 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) [2022-03-18 18:13:22,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 18:13:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 18:13:22,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:13:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 18:13:22,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:13:22,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:13:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844603529] [2022-03-18 18:13:22,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:13:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196076539] [2022-03-18 18:13:22,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196076539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:13:22,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:13:22,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 18:13:22,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53763350] [2022-03-18 18:13:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:13:22,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:13:22,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:13:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:13:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:13:22,721 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-03-18 18:13:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:13:22,862 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2022-03-18 18:13:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:13:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 34 [2022-03-18 18:13:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:13:22,864 INFO L225 Difference]: With dead ends: 71 [2022-03-18 18:13:22,864 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 18:13:22,865 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:13:22,865 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 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 [2022-03-18 18:13:22,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:13:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 18:13:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-18 18:13:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 18:13:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-03-18 18:13:22,875 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 34 [2022-03-18 18:13:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:13:22,875 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-03-18 18:13:22,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-03-18 18:13:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-03-18 18:13:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 18:13:22,876 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:22,877 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:13:22,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 18:13:23,101 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 [2022-03-18 18:13:23,101 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-18 18:13:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:23,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071612242] [2022-03-18 18:13:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:23,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:23,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:13:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062017830] [2022-03-18 18:13:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:23,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:13:23,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:13:23,136 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) [2022-03-18 18:13:23,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 18:13:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:13:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 18:13:23,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:13:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 18:13:23,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:13:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 18:13:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:13:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071612242] [2022-03-18 18:13:23,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:13:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062017830] [2022-03-18 18:13:23,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062017830] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 18:13:23,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:13:23,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-18 18:13:23,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585536914] [2022-03-18 18:13:23,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:13:23,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:13:23,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:13:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:13:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:13:23,745 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-03-18 18:13:25,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:13:28,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:13:30,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:13:32,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 18:13:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:13:32,837 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-03-18 18:13:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 18:13:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 44 [2022-03-18 18:13:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:13:32,840 INFO L225 Difference]: With dead ends: 79 [2022-03-18 18:13:32,840 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 18:13:32,840 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 18:13:32,841 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:13:32,841 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 122 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2022-03-18 18:13:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 18:13:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-03-18 18:13:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 18:13:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-03-18 18:13:32,856 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 44 [2022-03-18 18:13:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:13:32,856 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-03-18 18:13:32,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-03-18 18:13:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-03-18 18:13:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 18:13:32,860 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:13:32,860 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-18 18:13:32,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 18:13:33,086 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 [2022-03-18 18:13:33,086 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:13:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:13:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash 582060793, now seen corresponding path program 1 times [2022-03-18 18:13:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:13:33,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336321066] [2022-03-18 18:13:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:33,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:13:33,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:13:33,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888813837] [2022-03-18 18:13:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:13:33,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:13:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:13:33,119 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) [2022-03-18 18:13:33,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process