/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/ps3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 20:36:14,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 20:36:14,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 20:36:14,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 20:36:14,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 20:36:14,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 20:36:14,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 20:36:14,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 20:36:14,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 20:36:14,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 20:36:14,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 20:36:14,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 20:36:14,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 20:36:14,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 20:36:14,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 20:36:14,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 20:36:14,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 20:36:14,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 20:36:14,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 20:36:14,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 20:36:14,539 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 20:36:14,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 20:36:14,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 20:36:14,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 20:36:14,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 20:36:14,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 20:36:14,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 20:36:14,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 20:36:14,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 20:36:14,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 20:36:14,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 20:36:14,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 20:36:14,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 20:36:14,571 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 20:36:14,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 20:36:14,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 20:36:14,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 20:36:14,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 20:36:14,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 20:36:14,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 20:36:14,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:36:14,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 20:36:14,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 20:36:14,573 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 20:36:14,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 20:36:14,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 20:36:14,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 20:36:14,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 20:36:14,720 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 20:36:14,721 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 20:36:14,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound50.c [2022-03-18 20:36:14,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f2179f9/991d5351ca844bc3a78a75c5cd21e184/FLAG227a54d7e [2022-03-18 20:36:15,098 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 20:36:15,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound50.c [2022-03-18 20:36:15,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f2179f9/991d5351ca844bc3a78a75c5cd21e184/FLAG227a54d7e [2022-03-18 20:36:15,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f2179f9/991d5351ca844bc3a78a75c5cd21e184 [2022-03-18 20:36:15,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 20:36:15,123 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 20:36:15,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 20:36:15,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 20:36:15,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 20:36:15,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524d1f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15, skipping insertion in model container [2022-03-18 20:36:15,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 20:36:15,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 20:36:15,279 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/ps3-ll_unwindbound50.c[458,471] [2022-03-18 20:36:15,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:36:15,293 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 20:36:15,301 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/ps3-ll_unwindbound50.c[458,471] [2022-03-18 20:36:15,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:36:15,312 INFO L208 MainTranslator]: Completed translation [2022-03-18 20:36:15,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15 WrapperNode [2022-03-18 20:36:15,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 20:36:15,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 20:36:15,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 20:36:15,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 20:36:15,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 20:36:15,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 20:36:15,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 20:36:15,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 20:36:15,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:36:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:36:15,362 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 20:36:15,365 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 20:36:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 20:36:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 20:36:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 20:36:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 20:36:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 20:36:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 20:36:15,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 20:36:15,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 20:36:15,385 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 20:36:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 20:36:15,428 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 20:36:15,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 20:36:15,523 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 20:36:15,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 20:36:15,528 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 20:36:15,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:36:15 BoogieIcfgContainer [2022-03-18 20:36:15,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 20:36:15,529 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 20:36:15,529 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 20:36:15,530 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 20:36:15,534 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:36:15" (1/1) ... [2022-03-18 20:36:15,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:36:15 BasicIcfg [2022-03-18 20:36:15,549 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 20:36:15,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 20:36:15,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 20:36:15,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 20:36:15,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 08:36:15" (1/4) ... [2022-03-18 20:36:15,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4117c83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:36:15, skipping insertion in model container [2022-03-18 20:36:15,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:36:15" (2/4) ... [2022-03-18 20:36:15,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4117c83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:36:15, skipping insertion in model container [2022-03-18 20:36:15,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:36:15" (3/4) ... [2022-03-18 20:36:15,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4117c83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:36:15, skipping insertion in model container [2022-03-18 20:36:15,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:36:15" (4/4) ... [2022-03-18 20:36:15,569 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound50.cJordan [2022-03-18 20:36:15,573 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 20:36:15,573 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 20:36:15,600 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 20:36:15,605 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 20:36:15,605 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 20:36:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 20:36:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 20:36:15,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:36:15,620 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:36:15,620 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:36:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:36:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2022-03-18 20:36:15,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:36:15,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575637415] [2022-03-18 20:36:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:36:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:36:15,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 20:36:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:36:15,757 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 20:36:15,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:36:15,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575637415] [2022-03-18 20:36:15,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575637415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:36:15,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:36:15,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 20:36:15,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155743649] [2022-03-18 20:36:15,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:36:15,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 20:36:15,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:36:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 20:36:15,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:36:15,794 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 20:36:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:36:15,844 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-03-18 20:36:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 20:36:15,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 20:36:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:36:15,852 INFO L225 Difference]: With dead ends: 23 [2022-03-18 20:36:15,853 INFO L226 Difference]: Without dead ends: 18 [2022-03-18 20:36:15,854 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:36:15,856 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:36:15,856 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:36:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-18 20:36:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-03-18 20:36:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 20:36:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 20:36:15,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-18 20:36:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:36:15,876 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 20:36:15,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 20:36:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 20:36:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 20:36:15,876 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:36:15,876 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:36:15,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 20:36:15,877 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:36:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:36:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2022-03-18 20:36:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:36:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089008573] [2022-03-18 20:36:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:36:15,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:36:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629030985] [2022-03-18 20:36:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:15,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:36:15,890 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 20:36:15,891 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 20:36:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:36:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 20:36:15,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:36:16,016 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 20:36:16,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:36:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:36:16,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089008573] [2022-03-18 20:36:16,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:36:16,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629030985] [2022-03-18 20:36:16,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629030985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:36:16,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:36:16,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 20:36:16,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479423321] [2022-03-18 20:36:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:36:16,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 20:36:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:36:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 20:36:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 20:36:16,026 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 20:36:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:36:16,039 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-03-18 20:36:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 20:36:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 20:36:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:36:16,041 INFO L225 Difference]: With dead ends: 19 [2022-03-18 20:36:16,042 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 20:36:16,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 20:36:16,044 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:36:16,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:36:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 20:36:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 20:36:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 20:36:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-18 20:36:16,056 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-03-18 20:36:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:36:16,056 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-18 20:36:16,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 20:36:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-18 20:36:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 20:36:16,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:36:16,056 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:36:16,082 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 20:36:16,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:16,276 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:36:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:36:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2022-03-18 20:36:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:36:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087415834] [2022-03-18 20:36:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:36:16,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:36:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390536543] [2022-03-18 20:36:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:16,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:36:16,290 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 20:36:16,292 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 20:36:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:36:16,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:36:16,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:36:16,377 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 20:36:16,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:36:16,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:36:16,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087415834] [2022-03-18 20:36:16,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:36:16,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390536543] [2022-03-18 20:36:16,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390536543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:36:16,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:36:16,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 20:36:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348063892] [2022-03-18 20:36:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:36:16,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:36:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:36:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:36:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 20:36:16,380 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 20:36:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:36:16,400 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-18 20:36:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:36:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 20:36:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:36:16,401 INFO L225 Difference]: With dead ends: 26 [2022-03-18 20:36:16,401 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 20:36:16,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 20:36:16,402 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:36:16,402 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:36:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 20:36:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 20:36:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 20:36:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-18 20:36:16,405 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-03-18 20:36:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:36:16,405 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-18 20:36:16,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 20:36:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-18 20:36:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 20:36:16,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:36:16,406 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:36:16,423 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 20:36:16,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 20:36:16,621 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:36:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:36:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2022-03-18 20:36:16,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:36:16,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431912962] [2022-03-18 20:36:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:16,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:36:16,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:36:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651383943] [2022-03-18 20:36:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:16,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:16,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:36:16,668 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 20:36:16,710 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 20:36:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:36:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:36:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:36:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:36:16,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:36:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:36:16,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:36:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431912962] [2022-03-18 20:36:16,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:36:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651383943] [2022-03-18 20:36:16,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651383943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:36:16,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:36:16,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 20:36:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689276126] [2022-03-18 20:36:16,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:36:16,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 20:36:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:36:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 20:36:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:36:16,917 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 20:36:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:36:16,979 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-03-18 20:36:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 20:36:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-03-18 20:36:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:36:16,982 INFO L225 Difference]: With dead ends: 49 [2022-03-18 20:36:16,982 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 20:36:16,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 20:36:16,985 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:36:16,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 75 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:36:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 20:36:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-03-18 20:36:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:36:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-18 20:36:16,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2022-03-18 20:36:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:36:16,998 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-18 20:36:16,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 20:36:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-18 20:36:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 20:36:17,000 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:36:17,003 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:36:17,057 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 20:36:17,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:17,215 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:36:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:36:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2022-03-18 20:36:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:36:17,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502723238] [2022-03-18 20:36:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:36:17,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:36:17,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995400504] [2022-03-18 20:36:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:36:17,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:17,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:36:17,232 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 20:36:17,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 20:36:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:36:17,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 20:36:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:36:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:36:17,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:36:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 20:36:17,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:36:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502723238] [2022-03-18 20:36:17,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:36:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995400504] [2022-03-18 20:36:17,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995400504] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 20:36:17,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:36:17,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 20:36:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709212998] [2022-03-18 20:36:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:36:17,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:36:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:36:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:36:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 20:36:17,433 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 20:36:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:36:17,445 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-03-18 20:36:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:36:17,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-18 20:36:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:36:17,446 INFO L225 Difference]: With dead ends: 43 [2022-03-18 20:36:17,446 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 20:36:17,446 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:36:17,446 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:36:17,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:36:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 20:36:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 20:36:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 20:36:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 20:36:17,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-03-18 20:36:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:36:17,447 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 20:36:17,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 20:36:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 20:36:17,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 20:36:17,450 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 20:36:17,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 20:36:17,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:36:17,659 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-03-18 20:36:17,660 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 20:36:17,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:36:17 BasicIcfg [2022-03-18 20:36:17,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 20:36:17,675 INFO L158 Benchmark]: Toolchain (without parser) took 2552.11ms. Allocated memory was 220.2MB in the beginning and 264.2MB in the end (delta: 44.0MB). Free memory was 193.5MB in the beginning and 206.2MB in the end (delta: -12.8MB). Peak memory consumption was 31.2MB. Max. memory is 8.0GB. [2022-03-18 20:36:17,675 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 220.2MB. Free memory is still 180.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:36:17,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.15ms. Allocated memory is still 220.2MB. Free memory was 193.3MB in the beginning and 191.7MB in the end (delta: 1.5MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-03-18 20:36:17,675 INFO L158 Benchmark]: Boogie Preprocessor took 24.64ms. Allocated memory is still 220.2MB. Free memory was 191.7MB in the beginning and 190.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:36:17,676 INFO L158 Benchmark]: RCFGBuilder took 190.99ms. Allocated memory is still 220.2MB. Free memory was 190.3MB in the beginning and 180.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 20:36:17,676 INFO L158 Benchmark]: IcfgTransformer took 33.84ms. Allocated memory is still 220.2MB. Free memory was 180.3MB in the beginning and 178.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:36:17,676 INFO L158 Benchmark]: TraceAbstraction took 2110.32ms. Allocated memory was 220.2MB in the beginning and 264.2MB in the end (delta: 44.0MB). Free memory was 178.5MB in the beginning and 206.2MB in the end (delta: -27.8MB). Peak memory consumption was 16.0MB. Max. memory is 8.0GB. [2022-03-18 20:36:17,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 220.2MB. Free memory is still 180.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.15ms. Allocated memory is still 220.2MB. Free memory was 193.3MB in the beginning and 191.7MB in the end (delta: 1.5MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.64ms. Allocated memory is still 220.2MB. Free memory was 191.7MB in the beginning and 190.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 190.99ms. Allocated memory is still 220.2MB. Free memory was 190.3MB in the beginning and 180.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.84ms. Allocated memory is still 220.2MB. Free memory was 180.3MB in the beginning and 178.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2110.32ms. Allocated memory was 220.2MB in the beginning and 264.2MB in the end (delta: 44.0MB). Free memory was 178.5MB in the beginning and 206.2MB in the end (delta: -27.8MB). Peak memory consumption was 16.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 251 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 162 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 70 IncrementalHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 89 mSDtfsCounter, 70 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 376 SizeOfPredicates, 5 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 20:36:17,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...