/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/loops-crafted-1/iftelse.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:16:54,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:16:54,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:16:54,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:16:54,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:16:54,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:16:54,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:16:54,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:16:54,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:16:54,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:16:54,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:16:54,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:16:54,435 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:16:54,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:16:54,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:16:54,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:16:54,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:16:54,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 15:16:54,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:16:54,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:16:54,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:16:54,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:16:54,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:16:54,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:16:54,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:16:54,458 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:16:54,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:16:54,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:16:54,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:16:54,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:16:54,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:16:54,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:16:54,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:16:54,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:16:54,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:16:54,461 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:16:54,461 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:16:54,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:16:54,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:16:54,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:16:54,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:16:54,650 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:16:54,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/iftelse.c [2022-03-17 15:16:54,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873d749ec/fcebed9b52284a2a987010e240361ecc/FLAGa9d06afe2 [2022-03-17 15:16:55,013 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:16:55,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/iftelse.c [2022-03-17 15:16:55,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873d749ec/fcebed9b52284a2a987010e240361ecc/FLAGa9d06afe2 [2022-03-17 15:16:55,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873d749ec/fcebed9b52284a2a987010e240361ecc [2022-03-17 15:16:55,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:16:55,030 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:16:55,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:16:55,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:16:55,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:16:55,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233fe667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55, skipping insertion in model container [2022-03-17 15:16:55,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:16:55,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:16:55,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/iftelse.c[406,419] [2022-03-17 15:16:55,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:16:55,176 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:16:55,189 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/iftelse.c[406,419] [2022-03-17 15:16:55,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:16:55,203 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:16:55,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55 WrapperNode [2022-03-17 15:16:55,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:16:55,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:16:55,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:16:55,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:16:55,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:16:55,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:16:55,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:16:55,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:16:55,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:16:55,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:16:55,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:16:55,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:16:55,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:16:55,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:16:55,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:16:55,310 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:16:55,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:16:55,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:16:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:16:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:16:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:16:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:16:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:16:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:16:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 15:16:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:16:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:16:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:16:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:16:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:16:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:16:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:16:55,362 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:16:55,363 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:16:55,468 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:16:55,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:16:55,472 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:16:55,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:16:55 BoogieIcfgContainer [2022-03-17 15:16:55,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:16:55,474 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:16:55,474 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:16:55,480 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:16:55,482 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:16:55" (1/1) ... [2022-03-17 15:16:55,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:16:55 BasicIcfg [2022-03-17 15:16:55,507 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:16:55,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:16:55,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:16:55,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:16:55,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:16:55" (1/4) ... [2022-03-17 15:16:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dfa7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:16:55, skipping insertion in model container [2022-03-17 15:16:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:16:55" (2/4) ... [2022-03-17 15:16:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dfa7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:16:55, skipping insertion in model container [2022-03-17 15:16:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:16:55" (3/4) ... [2022-03-17 15:16:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dfa7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:16:55, skipping insertion in model container [2022-03-17 15:16:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:16:55" (4/4) ... [2022-03-17 15:16:55,527 INFO L111 eAbstractionObserver]: Analyzing ICFG iftelse.cJordan [2022-03-17 15:16:55,531 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:16:55,531 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:16:55,573 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:16:55,577 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 15:16:55,578 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:16:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:16:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 15:16:55,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:16:55,592 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:16:55,593 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:16:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:16:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash -801963998, now seen corresponding path program 1 times [2022-03-17 15:16:55,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:16:55,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054637101] [2022-03-17 15:16:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:16:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:16:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:16:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:16:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:16:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:16:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:16:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054637101] [2022-03-17 15:16:56,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054637101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:16:56,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:16:56,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 15:16:56,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490501164] [2022-03-17 15:16:56,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:16:56,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 15:16:56,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:16:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 15:16:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:16:56,123 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:16:58,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:17:00,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:17:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:17:00,566 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-17 15:17:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 15:17:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2022-03-17 15:17:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:17:00,573 INFO L225 Difference]: With dead ends: 38 [2022-03-17 15:17:00,573 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 15:17:00,574 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:17:00,576 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:17:00,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 55 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-03-17 15:17:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 15:17:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-03-17 15:17:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:17:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-17 15:17:00,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-03-17 15:17:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:17:00,599 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-17 15:17:00,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:17:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-17 15:17:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 15:17:00,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:17:00,600 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:17:00,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:17:00,600 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:17:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:17:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2135486064, now seen corresponding path program 1 times [2022-03-17 15:17:00,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:17:00,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787162594] [2022-03-17 15:17:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:17:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:17:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:17:00,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:17:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:17:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:17:00,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:17:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787162594] [2022-03-17 15:17:00,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787162594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:17:00,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:17:00,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:17:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375491290] [2022-03-17 15:17:00,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:17:00,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:17:00,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:17:00,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:17:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:17:00,641 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:17:02,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:17:04,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:17:04,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:17:04,855 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-03-17 15:17:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:17:04,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2022-03-17 15:17:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:17:04,857 INFO L225 Difference]: With dead ends: 26 [2022-03-17 15:17:04,857 INFO L226 Difference]: Without dead ends: 25 [2022-03-17 15:17:04,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:17:04,858 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:17:04,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-17 15:17:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-17 15:17:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-17 15:17:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:17:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-17 15:17:04,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2022-03-17 15:17:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:17:04,870 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-17 15:17:04,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:17:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-17 15:17:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 15:17:04,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:17:04,871 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:17:04,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:17:04,871 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:17:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:17:04,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1201514649, now seen corresponding path program 1 times [2022-03-17 15:17:04,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:17:04,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436092756] [2022-03-17 15:17:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:17:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:17:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:17:04,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:17:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:17:05,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:17:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:17:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:17:05,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:17:05,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436092756] [2022-03-17 15:17:05,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436092756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:17:05,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593635128] [2022-03-17 15:17:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:17:05,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:17:05,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:17:05,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:17:05,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process