/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/loop-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:25:50,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:25:50,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:25:50,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 17:25:50,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:25:50,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:25:50,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:25:50,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:25:50,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:25:50,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:25:50,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:25:50,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:25:50,492 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:25:50,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:25:50,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:25:50,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:25:50,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:25:50,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:25:50,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:25:50,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:25:50,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:25:50,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:25:50,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:25:50,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:25:50,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:25:50,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:25:50,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:25:50,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:25:50,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:25:50,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:25:50,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:25:50,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:25:50,517 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:25:50,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:25:50,517 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:25:50,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:25:50,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:25:50,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:25:50,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:25:50,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:25:50,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:25:50,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:25:50,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:25:50,519 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:25:50,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:25:50,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:25:50,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:25:50,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:25:50,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:25:50,781 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:25:50,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2022-03-18 17:25:50,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/546eab2c3/12beea6658674442aff5d753049128d3/FLAGd25e41e9d [2022-03-18 17:25:51,213 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:25:51,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2022-03-18 17:25:51,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/546eab2c3/12beea6658674442aff5d753049128d3/FLAGd25e41e9d [2022-03-18 17:25:51,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/546eab2c3/12beea6658674442aff5d753049128d3 [2022-03-18 17:25:51,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:25:51,241 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:25:51,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:25:51,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:25:51,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:25:51,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31789f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51, skipping insertion in model container [2022-03-18 17:25:51,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:25:51,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:25:51,425 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c[394,407] [2022-03-18 17:25:51,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:25:51,475 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:25:51,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c[394,407] [2022-03-18 17:25:51,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:25:51,522 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:25:51,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51 WrapperNode [2022-03-18 17:25:51,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:25:51,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:25:51,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:25:51,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:25:51,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:25:51,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:25:51,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:25:51,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:25:51,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (1/1) ... [2022-03-18 17:25:51,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:25:51,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:25:51,596 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 17:25:51,619 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 17:25:51,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:25:51,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:25:51,640 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:25:51,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:25:51,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:25:51,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:25:51,640 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:25:51,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:25:51,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:25:51,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:25:51,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:25:51,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:25:51,699 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:25:51,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:25:56,156 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:25:56,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:25:56,161 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 17:25:56,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:25:56 BoogieIcfgContainer [2022-03-18 17:25:56,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:25:56,163 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:25:56,163 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:25:56,164 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:25:56,167 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:25:56" (1/1) ... [2022-03-18 17:25:56,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:25:56 BasicIcfg [2022-03-18 17:25:56,180 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:25:56,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:25:56,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:25:56,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:25:56,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:25:51" (1/4) ... [2022-03-18 17:25:56,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f76543f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:25:56, skipping insertion in model container [2022-03-18 17:25:56,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:25:51" (2/4) ... [2022-03-18 17:25:56,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f76543f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:25:56, skipping insertion in model container [2022-03-18 17:25:56,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:25:56" (3/4) ... [2022-03-18 17:25:56,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f76543f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:25:56, skipping insertion in model container [2022-03-18 17:25:56,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:25:56" (4/4) ... [2022-03-18 17:25:56,186 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.cJordan [2022-03-18 17:25:56,209 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:25:56,209 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:25:56,257 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:25:56,269 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 17:25:56,270 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:25:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-18 17:25:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:25:56,298 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:25:56,298 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:25:56,299 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:25:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:25:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -281797978, now seen corresponding path program 1 times [2022-03-18 17:25:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:25:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599939765] [2022-03-18 17:25:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:25:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:25:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:25:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:25:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:25:56,512 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 17:25:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:25:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599939765] [2022-03-18 17:25:56,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599939765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:25:56,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:25:56,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:25:56,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879863366] [2022-03-18 17:25:56,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:25:56,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:25:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:25:56,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:25:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:25:56,550 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 18 states have internal predecessors, (24), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:25:58,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 17:25:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:25:58,758 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-18 17:25:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:25:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:25:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:25:58,766 INFO L225 Difference]: With dead ends: 25 [2022-03-18 17:25:58,767 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 17:25:58,769 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 17:25:58,777 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:25:58,778 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 17:25:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 17:25:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 17:25:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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 17:25:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-18 17:25:58,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-03-18 17:25:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:25:58,806 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-18 17:25:58,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:25:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-18 17:25:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 17:25:58,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:25:58,807 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:25:58,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:25:58,808 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:25:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:25:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash 795142128, now seen corresponding path program 1 times [2022-03-18 17:25:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:25:58,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170492946] [2022-03-18 17:25:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:25:58,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:25:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:25:58,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:25:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:25:58,901 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 17:25:58,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:25:58,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170492946] [2022-03-18 17:25:58,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170492946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:25:58,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:25:58,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:25:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635148979] [2022-03-18 17:25:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:25:58,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:25:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:25:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:25:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:25:58,904 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 17:26:00,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 17:26:03,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 17:26:05,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 17:26:07,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 17:26:09,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 17:26:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:26:09,766 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-03-18 17:26:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:26:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-03-18 17:26:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:26:09,767 INFO L225 Difference]: With dead ends: 23 [2022-03-18 17:26:09,767 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 17:26:09,767 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 [2022-03-18 17:26:09,769 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-03-18 17:26:09,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 10.8s Time] [2022-03-18 17:26:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 17:26:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-03-18 17:26:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 17:26:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-03-18 17:26:09,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2022-03-18 17:26:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:26:09,773 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-03-18 17:26:09,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 17:26:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-03-18 17:26:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 17:26:09,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:26:09,774 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:26:09,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:26:09,775 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:26:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:26:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1068283583, now seen corresponding path program 1 times [2022-03-18 17:26:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:26:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393993017] [2022-03-18 17:26:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:26:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:26:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:26:10,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:26:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:26:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:26:10,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:26:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393993017] [2022-03-18 17:26:10,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393993017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:26:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416027363] [2022-03-18 17:26:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:26:10,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:26:10,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:26:10,141 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 17:26:10,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process