/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/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:32:06,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:32:06,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:32:06,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:32:06,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:32:06,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:32:06,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:32:06,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:32:06,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:32:06,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:32:06,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:32:06,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:32:06,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:32:06,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:32:06,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:32:06,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:32:06,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:32:06,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:32:06,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:32:06,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:32:06,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:32:06,176 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:32:06,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:32:06,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:32:06,177 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:32:06,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:32:06,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:32:06,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:32:06,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:32:06,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:32:06,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:32:06,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:32:06,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:32:06,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:32:06,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:32:06,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:32:06,180 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:32:06,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:32:06,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:32:06,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:32:06,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:32:06,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:32:06,408 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:32:06,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2022-02-14 20:32:06,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c24e2970/0169a2b9a40c4cf9bbd441913e5e02ff/FLAGeefa7fb40 [2022-02-14 20:32:06,804 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:32:06,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2022-02-14 20:32:06,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c24e2970/0169a2b9a40c4cf9bbd441913e5e02ff/FLAGeefa7fb40 [2022-02-14 20:32:06,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c24e2970/0169a2b9a40c4cf9bbd441913e5e02ff [2022-02-14 20:32:06,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:32:06,820 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:32:06,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:32:06,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:32:06,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:32:06,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:32:06" (1/1) ... [2022-02-14 20:32:06,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98dd4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:06, skipping insertion in model container [2022-02-14 20:32:06,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:32:06" (1/1) ... [2022-02-14 20:32:06,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:32:06,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:32:07,013 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/heavy-1.c[600,613] [2022-02-14 20:32:07,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:32:07,085 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:32:07,115 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/heavy-1.c[600,613] [2022-02-14 20:32:07,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:32:07,182 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:32:07,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07 WrapperNode [2022-02-14 20:32:07,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:32:07,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:32:07,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:32:07,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:32:07,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:32:07,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:32:07,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:32:07,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:32:07,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:32:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:07,237 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) [2022-02-14 20:32:07,239 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 [2022-02-14 20:32:07,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:32:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:32:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:32:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:32:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:32:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:32:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:32:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:32:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:32:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:32:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:32:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:32:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:32:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-02-14 20:32:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:32:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:32:07,315 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:32:07,316 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:32:07,399 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:32:07,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:32:07,403 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 20:32:07,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:07 BoogieIcfgContainer [2022-02-14 20:32:07,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:32:07,405 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:32:07,405 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:32:07,406 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:32:07,409 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:07" (1/1) ... [2022-02-14 20:32:07,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:32:07 BasicIcfg [2022-02-14 20:32:07,430 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:32:07,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:32:07,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:32:07,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:32:07,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:32:06" (1/4) ... [2022-02-14 20:32:07,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783161e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:32:07, skipping insertion in model container [2022-02-14 20:32:07,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:32:07" (2/4) ... [2022-02-14 20:32:07,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783161e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:32:07, skipping insertion in model container [2022-02-14 20:32:07,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:32:07" (3/4) ... [2022-02-14 20:32:07,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783161e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:32:07, skipping insertion in model container [2022-02-14 20:32:07,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:32:07" (4/4) ... [2022-02-14 20:32:07,448 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.cJordan [2022-02-14 20:32:07,452 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:32:07,452 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:32:07,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:32:07,520 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 20:32:07,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:32:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:32:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-02-14 20:32:07,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:07,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:07,548 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1140822413, now seen corresponding path program 1 times [2022-02-14 20:32:07,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:07,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494594378] [2022-02-14 20:32:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:07,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:07,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:07,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:07,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494594378] [2022-02-14 20:32:07,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494594378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:07,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:07,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:32:07,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435275077] [2022-02-14 20:32:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:32:07,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:32:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:32:07,826 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:07,903 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-02-14 20:32:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:32:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-02-14 20:32:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:07,917 INFO L225 Difference]: With dead ends: 39 [2022-02-14 20:32:07,917 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 20:32:07,919 INFO L932 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 [2022-02-14 20:32:07,922 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:07,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:32:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 20:32:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-02-14 20:32:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-14 20:32:07,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-02-14 20:32:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:07,950 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-14 20:32:07,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-14 20:32:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 20:32:07,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:07,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:07,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:32:07,952 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash 195845143, now seen corresponding path program 1 times [2022-02-14 20:32:07,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:07,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593778308] [2022-02-14 20:32:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:07,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:08,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593778308] [2022-02-14 20:32:08,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593778308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:08,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:08,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:32:08,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202516069] [2022-02-14 20:32:08,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:08,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:32:08,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:32:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:32:08,027 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:08,088 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-02-14 20:32:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:32:08,088 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 20:32:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:08,089 INFO L225 Difference]: With dead ends: 31 [2022-02-14 20:32:08,089 INFO L226 Difference]: Without dead ends: 31 [2022-02-14 20:32:08,089 INFO L932 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 [2022-02-14 20:32:08,091 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:08,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:32:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-14 20:32:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-02-14 20:32:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-14 20:32:08,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-02-14 20:32:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:08,094 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-14 20:32:08,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-14 20:32:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-14 20:32:08,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:08,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:08,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:32:08,097 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1483649217, now seen corresponding path program 1 times [2022-02-14 20:32:08,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:08,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486049925] [2022-02-14 20:32:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:08,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:08,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486049925] [2022-02-14 20:32:08,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486049925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:32:08,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:32:08,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:32:08,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040949325] [2022-02-14 20:32:08,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:32:08,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:32:08,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:32:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:32:08,146 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:08,174 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-02-14 20:32:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:32:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-14 20:32:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:08,175 INFO L225 Difference]: With dead ends: 21 [2022-02-14 20:32:08,175 INFO L226 Difference]: Without dead ends: 21 [2022-02-14 20:32:08,175 INFO L932 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 [2022-02-14 20:32:08,176 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:08,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:32:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-14 20:32:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-02-14 20:32:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-14 20:32:08,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-02-14 20:32:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:08,179 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-14 20:32:08,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-14 20:32:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 20:32:08,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:08,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:08,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 20:32:08,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1830037535, now seen corresponding path program 1 times [2022-02-14 20:32:08,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:08,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118520421] [2022-02-14 20:32:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:32:08,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:08,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118520421] [2022-02-14 20:32:08,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118520421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:08,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011856637] [2022-02-14 20:32:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:08,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:08,274 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) [2022-02-14 20:32:08,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:32:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:08,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 20:32:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:32:08,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:32:08,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011856637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:08,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:08,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-02-14 20:32:08,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306830253] [2022-02-14 20:32:08,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:08,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 20:32:08,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 20:32:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:32:08,515 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 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) [2022-02-14 20:32:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:08,675 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-02-14 20:32:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 20:32:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 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 17 [2022-02-14 20:32:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:08,677 INFO L225 Difference]: With dead ends: 47 [2022-02-14 20:32:08,677 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 20:32:08,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-02-14 20:32:08,684 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:08,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 60 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:32:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 20:32:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-02-14 20:32:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-02-14 20:32:08,696 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 17 [2022-02-14 20:32:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:08,696 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-02-14 20:32:08,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 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) [2022-02-14 20:32:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-02-14 20:32:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-14 20:32:08,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:08,697 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:08,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 20:32:08,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:08,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash -88142185, now seen corresponding path program 2 times [2022-02-14 20:32:08,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:08,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824525249] [2022-02-14 20:32:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:09,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-02-14 20:32:09,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:09,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824525249] [2022-02-14 20:32:09,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824525249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:09,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897581928] [2022-02-14 20:32:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:32:09,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:09,064 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) [2022-02-14 20:32:09,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:32:09,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:32:09,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:09,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 20:32:09,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-02-14 20:32:09,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-02-14 20:32:09,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897581928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:09,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:09,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2022-02-14 20:32:09,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089462445] [2022-02-14 20:32:09,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:09,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 20:32:09,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:09,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 20:32:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:32:09,406 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 1 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) [2022-02-14 20:32:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:09,803 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2022-02-14 20:32:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-14 20:32:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 1 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 40 [2022-02-14 20:32:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:09,804 INFO L225 Difference]: With dead ends: 106 [2022-02-14 20:32:09,804 INFO L226 Difference]: Without dead ends: 94 [2022-02-14 20:32:09,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-14 20:32:09,805 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:09,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 72 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:32:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-14 20:32:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-02-14 20:32:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-02-14 20:32:09,811 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 40 [2022-02-14 20:32:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:09,811 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-02-14 20:32:09,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 1 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) [2022-02-14 20:32:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-02-14 20:32:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-14 20:32:09,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:09,813 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:09,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:32:10,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:10,033 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash -865939241, now seen corresponding path program 3 times [2022-02-14 20:32:10,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:10,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541058262] [2022-02-14 20:32:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:10,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:10,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 182 proven. 36 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-14 20:32:10,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:10,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541058262] [2022-02-14 20:32:10,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541058262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:10,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817338163] [2022-02-14 20:32:10,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:32:10,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:10,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:10,288 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) [2022-02-14 20:32:10,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:32:10,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 20:32:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:10,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 20:32:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-02-14 20:32:10,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-02-14 20:32:10,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817338163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:10,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:10,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2022-02-14 20:32:10,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594522125] [2022-02-14 20:32:10,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:10,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 20:32:10,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 20:32:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:32:10,660 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 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) [2022-02-14 20:32:11,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:11,161 INFO L93 Difference]: Finished difference Result 310 states and 330 transitions. [2022-02-14 20:32:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-14 20:32:11,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 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 60 [2022-02-14 20:32:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:11,163 INFO L225 Difference]: With dead ends: 310 [2022-02-14 20:32:11,163 INFO L226 Difference]: Without dead ends: 310 [2022-02-14 20:32:11,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2022-02-14 20:32:11,164 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:11,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 74 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:32:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-14 20:32:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 294. [2022-02-14 20:32:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 290 states have (on average 1.0724137931034483) internal successors, (311), 290 states have internal predecessors, (311), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 314 transitions. [2022-02-14 20:32:11,196 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 314 transitions. Word has length 60 [2022-02-14 20:32:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:11,196 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 314 transitions. [2022-02-14 20:32:11,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 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) [2022-02-14 20:32:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 314 transitions. [2022-02-14 20:32:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-02-14 20:32:11,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:11,200 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:11,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 20:32:11,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:11,421 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -843185395, now seen corresponding path program 4 times [2022-02-14 20:32:11,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:11,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549345415] [2022-02-14 20:32:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:11,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 1718 proven. 49 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2022-02-14 20:32:11,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:11,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549345415] [2022-02-14 20:32:11,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549345415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:11,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554468833] [2022-02-14 20:32:11,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 20:32:11,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:11,944 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) [2022-02-14 20:32:11,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 20:32:12,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 20:32:12,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:32:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 20:32:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:32:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5551 proven. 694 refuted. 0 times theorem prover too weak. 8425 trivial. 0 not checked. [2022-02-14 20:32:12,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:32:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5374 proven. 1662 refuted. 0 times theorem prover too weak. 7634 trivial. 0 not checked. [2022-02-14 20:32:13,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554468833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:32:13,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:32:13,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 12] total 26 [2022-02-14 20:32:13,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460812590] [2022-02-14 20:32:13,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:32:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 20:32:13,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:32:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 20:32:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-02-14 20:32:13,238 INFO L87 Difference]: Start difference. First operand 294 states and 314 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 1 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) [2022-02-14 20:32:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:32:18,310 INFO L93 Difference]: Finished difference Result 822 states and 866 transitions. [2022-02-14 20:32:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-14 20:32:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 1 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 293 [2022-02-14 20:32:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:32:18,313 INFO L225 Difference]: With dead ends: 822 [2022-02-14 20:32:18,313 INFO L226 Difference]: Without dead ends: 822 [2022-02-14 20:32:18,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4763 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1815, Invalid=12947, Unknown=0, NotChecked=0, Total=14762 [2022-02-14 20:32:18,318 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:32:18,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 207 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-14 20:32:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-02-14 20:32:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 782. [2022-02-14 20:32:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 778 states have (on average 1.057840616966581) internal successors, (823), 778 states have internal predecessors, (823), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:32:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 826 transitions. [2022-02-14 20:32:18,358 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 826 transitions. Word has length 293 [2022-02-14 20:32:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:32:18,358 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 826 transitions. [2022-02-14 20:32:18,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 1 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) [2022-02-14 20:32:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 826 transitions. [2022-02-14 20:32:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-02-14 20:32:18,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:32:18,379 INFO L514 BasicCegarLoop]: trace histogram [320, 320, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:32:18,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 20:32:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:18,599 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:32:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:32:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1613231117, now seen corresponding path program 5 times [2022-02-14 20:32:18,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:32:18,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034269844] [2022-02-14 20:32:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:32:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:32:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:32:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:32:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 5702 proven. 64 refuted. 0 times theorem prover too weak. 111636 trivial. 0 not checked. [2022-02-14 20:32:20,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:32:20,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034269844] [2022-02-14 20:32:20,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034269844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:32:20,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639782042] [2022-02-14 20:32:20,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 20:32:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:32:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:32:20,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:32:20,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 20:33:03,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-14 20:33:03,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:33:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 20:33:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:33:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2022-02-14 20:33:04,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:33:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2022-02-14 20:33:05,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639782042] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:33:05,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:33:05,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-02-14 20:33:05,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59873528] [2022-02-14 20:33:05,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:33:05,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 20:33:05,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:33:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 20:33:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:33:05,389 INFO L87 Difference]: Start difference. First operand 782 states and 826 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 1 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) [2022-02-14 20:33:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:33:07,102 INFO L93 Difference]: Finished difference Result 1582 states and 1626 transitions. [2022-02-14 20:33:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 20:33:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 1 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 781 [2022-02-14 20:33:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:33:07,106 INFO L225 Difference]: With dead ends: 1582 [2022-02-14 20:33:07,106 INFO L226 Difference]: Without dead ends: 1582 [2022-02-14 20:33:07,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1553 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2022-02-14 20:33:07,107 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:33:07,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:33:07,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-02-14 20:33:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2022-02-14 20:33:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1578 states have (on average 1.0285171102661597) internal successors, (1623), 1578 states have internal predecessors, (1623), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:33:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 1626 transitions. [2022-02-14 20:33:07,126 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 1626 transitions. Word has length 781 [2022-02-14 20:33:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:33:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 1626 transitions. [2022-02-14 20:33:07,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 1 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) [2022-02-14 20:33:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 1626 transitions. [2022-02-14 20:33:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1582 [2022-02-14 20:33:07,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:33:07,166 INFO L514 BasicCegarLoop]: trace histogram [720, 720, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:33:07,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-14 20:33:07,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:33:07,374 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:33:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:33:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash 830375949, now seen corresponding path program 6 times [2022-02-14 20:33:07,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:33:07,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291489863] [2022-02-14 20:33:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:33:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:33:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:10,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:33:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:33:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 549002 backedges. 26762 proven. 324 refuted. 0 times theorem prover too weak. 521916 trivial. 0 not checked. [2022-02-14 20:33:10,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:33:10,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291489863] [2022-02-14 20:33:10,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291489863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:33:10,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297282604] [2022-02-14 20:33:10,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 20:33:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:33:10,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:33:10,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:33:10,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process