/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/array-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:22:30,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:22:30,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:22:30,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:22:30,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:22:30,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:22:30,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:22:30,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:22:30,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:22:30,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:22:30,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:22:30,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:22:30,353 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:22:30,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:22:30,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:22:30,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:22:30,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:22:30,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:22:30,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:22:30,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:22:30,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:22:30,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:22:30,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:22:30,355 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:22:30,355 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:22:30,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:22:30,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:22:30,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:22:30,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:22:30,594 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:22:30,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_range_init.i [2022-01-31 08:22:30,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58069ef2c/d216bbfcdb9f4772b495fa474f2a0dd9/FLAGab11a44f9 [2022-01-31 08:22:31,012 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:22:31,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_range_init.i [2022-01-31 08:22:31,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58069ef2c/d216bbfcdb9f4772b495fa474f2a0dd9/FLAGab11a44f9 [2022-01-31 08:22:31,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58069ef2c/d216bbfcdb9f4772b495fa474f2a0dd9 [2022-01-31 08:22:31,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:22:31,028 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:22:31,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:22:31,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:22:31,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:22:31,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196f6eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31, skipping insertion in model container [2022-01-31 08:22:31,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:22:31,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:22:31,217 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_range_init.i[809,822] [2022-01-31 08:22:31,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:22:31,237 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:22:31,245 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_range_init.i[809,822] [2022-01-31 08:22:31,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:22:31,263 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:22:31,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31 WrapperNode [2022-01-31 08:22:31,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:22:31,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:22:31,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:22:31,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:22:31,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:22:31,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:22:31,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:22:31,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:22:31,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:22:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:31,336 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) [2022-01-31 08:22:31,356 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 [2022-01-31 08:22:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:22:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:22:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:22:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:22:31,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:22:31,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:22:31,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:22:31,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:22:31,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:22:31,418 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:22:31,419 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:22:31,497 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:22:31,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:22:31,501 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:22:31,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:22:31 BoogieIcfgContainer [2022-01-31 08:22:31,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:22:31,503 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:22:31,504 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:22:31,504 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:22:31,507 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:22:31" (1/1) ... [2022-01-31 08:22:31,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:22:31 BasicIcfg [2022-01-31 08:22:31,518 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:22:31,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:22:31,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:22:31,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:22:31,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:22:31" (1/4) ... [2022-01-31 08:22:31,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d2a083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:22:31, skipping insertion in model container [2022-01-31 08:22:31,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:22:31" (2/4) ... [2022-01-31 08:22:31,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d2a083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:22:31, skipping insertion in model container [2022-01-31 08:22:31,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:22:31" (3/4) ... [2022-01-31 08:22:31,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d2a083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:22:31, skipping insertion in model container [2022-01-31 08:22:31,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:22:31" (4/4) ... [2022-01-31 08:22:31,523 INFO L111 eAbstractionObserver]: Analyzing ICFG array_range_init.iJordan [2022-01-31 08:22:31,527 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:22:31,527 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:22:31,556 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:22:31,561 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 [2022-01-31 08:22:31,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:22:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:22:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:22:31,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:31,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:31,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash 263644150, now seen corresponding path program 1 times [2022-01-31 08:22:31,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589123772] [2022-01-31 08:22:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:31,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:31,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:31,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:31,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589123772] [2022-01-31 08:22:31,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589123772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:22:31,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:22:31,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:22:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638324604] [2022-01-31 08:22:31,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:22:31,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:22:31,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:22:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:22:31,829 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:31,900 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-31 08:22:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:22:31,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:22:31,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:31,909 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:22:31,909 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:22:31,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:22:31,916 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:31,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:22:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:22:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-01-31 08:22:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 08:22:31,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 08:22:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:31,951 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 08:22:31,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 08:22:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:22:31,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:31,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:31,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:22:31,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1151147831, now seen corresponding path program 1 times [2022-01-31 08:22:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497746128] [2022-01-31 08:22:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:31,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:32,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497746128] [2022-01-31 08:22:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497746128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:22:32,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:22:32,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:22:32,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290525501] [2022-01-31 08:22:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:22:32,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:22:32,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:22:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:22:32,065 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:32,140 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 08:22:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 08:22:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:22:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:32,141 INFO L225 Difference]: With dead ends: 27 [2022-01-31 08:22:32,141 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:22:32,141 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 [2022-01-31 08:22:32,142 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:32,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:22:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:22:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-31 08:22:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 08:22:32,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-01-31 08:22:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:32,146 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 08:22:32,147 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 08:22:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 08:22:32,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:32,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:32,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:22:32,148 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1957450304, now seen corresponding path program 1 times [2022-01-31 08:22:32,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866235225] [2022-01-31 08:22:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:32,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:32,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866235225] [2022-01-31 08:22:32,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866235225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:32,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834454463] [2022-01-31 08:22:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:32,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:32,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:32,213 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) [2022-01-31 08:22:32,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:22:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:22:32,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:22:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:22:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834454463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:22:32,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:22:32,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:22:32,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608119367] [2022-01-31 08:22:32,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:22:32,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:22:32,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:22:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:22:32,415 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:32,507 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-01-31 08:22:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 08:22:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 08:22:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:32,508 INFO L225 Difference]: With dead ends: 44 [2022-01-31 08:22:32,508 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 08:22:32,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:22:32,509 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:32,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:22:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 08:22:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-01-31 08:22:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 08:22:32,513 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2022-01-31 08:22:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:32,514 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 08:22:32,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 08:22:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 08:22:32,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:32,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:32,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:22:32,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:32,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash -849808136, now seen corresponding path program 1 times [2022-01-31 08:22:32,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:32,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681299816] [2022-01-31 08:22:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:32,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681299816] [2022-01-31 08:22:32,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681299816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:32,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274674569] [2022-01-31 08:22:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:32,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:32,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:32,793 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) [2022-01-31 08:22:32,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:22:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:22:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:22:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:22:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:32,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274674569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:22:32,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:22:32,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:22:32,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587403502] [2022-01-31 08:22:32,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:22:32,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:22:32,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:22:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:22:32,998 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:33,146 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2022-01-31 08:22:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:22:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 08:22:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:33,147 INFO L225 Difference]: With dead ends: 96 [2022-01-31 08:22:33,147 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 08:22:33,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:22:33,149 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:33,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 51 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:22:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 08:22:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2022-01-31 08:22:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-01-31 08:22:33,155 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 25 [2022-01-31 08:22:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:33,155 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-01-31 08:22:33,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-01-31 08:22:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 08:22:33,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:33,156 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:33,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 08:22:33,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:22:33,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1455834327, now seen corresponding path program 2 times [2022-01-31 08:22:33,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:33,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340767718] [2022-01-31 08:22:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:33,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:33,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:33,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:33,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340767718] [2022-01-31 08:22:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340767718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776097015] [2022-01-31 08:22:33,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:22:33,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:33,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:33,522 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) [2022-01-31 08:22:33,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:22:33,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:22:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:22:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:22:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:22:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:33,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:22:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:33,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776097015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:22:33,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:22:33,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:22:33,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039644459] [2022-01-31 08:22:33,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:22:33,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:22:33,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:22:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:22:33,893 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:34,167 INFO L93 Difference]: Finished difference Result 207 states and 261 transitions. [2022-01-31 08:22:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 08:22:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 08:22:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:34,171 INFO L225 Difference]: With dead ends: 207 [2022-01-31 08:22:34,171 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 08:22:34,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:22:34,174 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 190 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:34,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 79 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:22:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 08:22:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 84. [2022-01-31 08:22:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.294871794871795) internal successors, (101), 78 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-01-31 08:22:34,197 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 43 [2022-01-31 08:22:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:34,198 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-01-31 08:22:34,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-01-31 08:22:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 08:22:34,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:34,200 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:34,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:22:34,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:34,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1520017865, now seen corresponding path program 3 times [2022-01-31 08:22:34,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:34,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253463703] [2022-01-31 08:22:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:34,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:34,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:34,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253463703] [2022-01-31 08:22:34,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253463703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:34,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545186013] [2022-01-31 08:22:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:22:34,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:34,701 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) [2022-01-31 08:22:34,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:22:34,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-01-31 08:22:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:22:34,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 08:22:34,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:22:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 373 proven. 155 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:22:35,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:22:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 373 proven. 155 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-01-31 08:22:35,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545186013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:22:35,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:22:35,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 50 [2022-01-31 08:22:35,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159184004] [2022-01-31 08:22:35,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:22:35,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:22:35,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:22:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:22:35,625 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 50 states, 50 states have (on average 2.92) internal successors, (146), 49 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:36,335 INFO L93 Difference]: Finished difference Result 436 states and 559 transitions. [2022-01-31 08:22:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 08:22:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.92) internal successors, (146), 49 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 08:22:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:36,337 INFO L225 Difference]: With dead ends: 436 [2022-01-31 08:22:36,337 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 08:22:36,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 08:22:36,339 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 576 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:36,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 124 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:22:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 08:22:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 159. [2022-01-31 08:22:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.3137254901960784) internal successors, (201), 153 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2022-01-31 08:22:36,361 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 79 [2022-01-31 08:22:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:36,361 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2022-01-31 08:22:36,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.92) internal successors, (146), 49 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2022-01-31 08:22:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 08:22:36,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:36,362 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:36,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:22:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:36,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1835372671, now seen corresponding path program 4 times [2022-01-31 08:22:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617731578] [2022-01-31 08:22:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:36,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:37,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:37,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617731578] [2022-01-31 08:22:37,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617731578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953056443] [2022-01-31 08:22:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:22:37,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:37,430 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) [2022-01-31 08:22:37,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:22:37,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:22:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:22:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 08:22:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:22:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:37,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:22:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:40,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953056443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:22:40,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:22:40,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-01-31 08:22:40,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339644696] [2022-01-31 08:22:40,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:22:40,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 08:22:40,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:22:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 08:22:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 08:22:40,038 INFO L87 Difference]: Start difference. First operand 159 states and 206 transitions. Second operand has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:22:42,402 INFO L93 Difference]: Finished difference Result 955 states and 1234 transitions. [2022-01-31 08:22:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 08:22:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 08:22:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:22:42,407 INFO L225 Difference]: With dead ends: 955 [2022-01-31 08:22:42,407 INFO L226 Difference]: Without dead ends: 955 [2022-01-31 08:22:42,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4953, Invalid=5147, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 08:22:42,409 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1409 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 1238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1238 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:22:42,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 237 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1238 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 08:22:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-31 08:22:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 306. [2022-01-31 08:22:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.3233333333333333) internal successors, (397), 300 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:22:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 402 transitions. [2022-01-31 08:22:42,430 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 402 transitions. Word has length 154 [2022-01-31 08:22:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:22:42,431 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 402 transitions. [2022-01-31 08:22:42,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.98) internal successors, (298), 99 states have internal predecessors, (298), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:22:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 402 transitions. [2022-01-31 08:22:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 08:22:42,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:22:42,433 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 49, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:22:42,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:22:42,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:42,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:22:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:22:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1888895080, now seen corresponding path program 5 times [2022-01-31 08:22:42,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:22:42,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921952193] [2022-01-31 08:22:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:22:42,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:22:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:45,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:22:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:22:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13776 backedges. 0 proven. 13776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:22:45,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:22:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921952193] [2022-01-31 08:22:45,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921952193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:22:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816137722] [2022-01-31 08:22:45,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:22:45,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:22:45,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:22:45,461 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) [2022-01-31 08:22:45,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process