/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:24:45,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:24:45,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:24:45,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 00:24:45,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:24:45,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:24:45,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:24:45,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:24:45,456 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:24:45,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:24:45,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:24:45,457 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:24:45,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:24:45,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:24:45,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:24:45,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:24:45,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:24:45,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:24:45,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:24:45,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:24:45,459 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:24:45,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:24:45,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:24:45,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:24:45,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:24:45,616 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:24:45,617 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:24:45,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-05 00:24:45,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb30d6ec/86e83a2f6c534b6c8714e73c63e053f9/FLAGc47327b8a [2022-04-05 00:24:45,978 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:24:45,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-05 00:24:45,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb30d6ec/86e83a2f6c534b6c8714e73c63e053f9/FLAGc47327b8a [2022-04-05 00:24:46,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb30d6ec/86e83a2f6c534b6c8714e73c63e053f9 [2022-04-05 00:24:46,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:24:46,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:24:46,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:24:46,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:24:46,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:24:46,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688e12c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46, skipping insertion in model container [2022-04-05 00:24:46,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:24:46,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:24:46,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-04-05 00:24:46,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:24:46,683 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:24:46,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-04-05 00:24:46,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:24:46,711 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:24:46,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46 WrapperNode [2022-04-05 00:24:46,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:24:46,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:24:46,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:24:46,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:24:46,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:24:46,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:24:46,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:24:46,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:24:46,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (1/1) ... [2022-04-05 00:24:46,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:24:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:24:46,759 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) [2022-04-05 00:24:46,764 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 [2022-04-05 00:24:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:24:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:24:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:24:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 00:24:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 00:24:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:24:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:24:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:24:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 00:24:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 00:24:46,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:24:46,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:24:46,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 00:24:46,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:24:46,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 00:24:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:24:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 00:24:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:24:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:24:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:24:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:24:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:24:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:24:46,883 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:24:46,884 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:24:47,001 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:24:47,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:24:47,005 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 00:24:47,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:24:47 BoogieIcfgContainer [2022-04-05 00:24:47,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:24:47,007 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:24:47,007 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:24:47,008 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:24:47,010 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:24:47" (1/1) ... [2022-04-05 00:24:47,012 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:24:47,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:24:47 BasicIcfg [2022-04-05 00:24:47,030 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:24:47,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:24:47,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:24:47,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:24:47,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:24:46" (1/4) ... [2022-04-05 00:24:47,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@862ef5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:24:47, skipping insertion in model container [2022-04-05 00:24:47,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:24:46" (2/4) ... [2022-04-05 00:24:47,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@862ef5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:24:47, skipping insertion in model container [2022-04-05 00:24:47,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:24:47" (3/4) ... [2022-04-05 00:24:47,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@862ef5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:24:47, skipping insertion in model container [2022-04-05 00:24:47,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:24:47" (4/4) ... [2022-04-05 00:24:47,050 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.iJordan [2022-04-05 00:24:47,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:24:47,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:24:47,082 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:24:47,086 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 00:24:47,086 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:24:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 00:24:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 00:24:47,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:24:47,106 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:24:47,106 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:24:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:24:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash -183287108, now seen corresponding path program 1 times [2022-04-05 00:24:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:24:47,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678101339] [2022-04-05 00:24:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:47,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:24:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:47,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:24:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:24:47,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:24:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678101339] [2022-04-05 00:24:47,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678101339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:24:47,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:24:47,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:24:47,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314206226] [2022-04-05 00:24:47,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:24:47,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:24:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:24:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:24:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:24:47,312 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-04-05 00:24:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:24:47,403 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-05 00:24:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 00:24:47,405 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 [2022-04-05 00:24:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:24:47,412 INFO L225 Difference]: With dead ends: 38 [2022-04-05 00:24:47,412 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 00:24:47,414 INFO L912 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 [2022-04-05 00:24:47,417 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:24:47,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 00:24:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 00:24:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-04-05 00:24:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 00:24:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-05 00:24:47,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-04-05 00:24:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:24:47,444 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-05 00:24:47,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 00:24:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-05 00:24:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 00:24:47,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:24:47,445 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:24:47,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 00:24:47,446 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:24:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:24:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 364957256, now seen corresponding path program 1 times [2022-04-05 00:24:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:24:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396296282] [2022-04-05 00:24:47,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:47,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:24:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:47,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:24:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:47,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:24:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:24:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:24:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396296282] [2022-04-05 00:24:47,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396296282] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:24:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274108929] [2022-04-05 00:24:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:47,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:24:47,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:24:47,601 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) [2022-04-05 00:24:47,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 00:24:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 00:24:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:24:47,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-05 00:24:47,823 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-05 00:24:47,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-05 00:24:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:24:47,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:24:48,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-05 00:24:48,074 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 00:24:48,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-05 00:24:48,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 00:24:48,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 4 [2022-04-05 00:24:48,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 00:24:48,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 00:24:48,130 INFO L356 Elim1Store]: treesize reduction 28, result has 50.0 percent of original size [2022-04-05 00:24:48,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 47 [2022-04-05 00:24:48,299 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-04-05 00:24:48,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 85 [2022-04-05 00:24:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:24:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274108929] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:24:48,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:24:48,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-04-05 00:24:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420030866] [2022-04-05 00:24:48,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:24:48,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 00:24:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:24:48,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 00:24:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-05 00:24:48,557 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 00:24:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:24:48,889 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-04-05 00:24:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 00:24:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-04-05 00:24:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:24:48,891 INFO L225 Difference]: With dead ends: 41 [2022-04-05 00:24:48,891 INFO L226 Difference]: Without dead ends: 41 [2022-04-05 00:24:48,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-04-05 00:24:48,892 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 00:24:48,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 00:24:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-05 00:24:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-04-05 00:24:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 00:24:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-05 00:24:48,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-04-05 00:24:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:24:48,896 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-05 00:24:48,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 00:24:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-05 00:24:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 00:24:48,897 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:24:48,897 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:24:48,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 00:24:49,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:24:49,110 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:24:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:24:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1998589396, now seen corresponding path program 2 times [2022-04-05 00:24:49,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:24:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818454583] [2022-04-05 00:24:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:24:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:24:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:24:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:24:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 00:24:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:24:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818454583] [2022-04-05 00:24:49,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818454583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:24:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040653495] [2022-04-05 00:24:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 00:24:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:24:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:24:49,190 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) [2022-04-05 00:24:49,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 00:24:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:24:49,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 00:24:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 00:24:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:24:49,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-05 00:24:49,533 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-05 00:24:49,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-05 00:24:49,850 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-05 00:24:49,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-05 00:24:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 00:24:49,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:24:53,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040653495] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:24:53,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:24:53,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-04-05 00:24:53,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015708877] [2022-04-05 00:24:53,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:24:53,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 00:24:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:24:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 00:24:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-04-05 00:24:53,548 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 00:24:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:24:54,150 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-04-05 00:24:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 00:24:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-05 00:24:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:24:54,152 INFO L225 Difference]: With dead ends: 55 [2022-04-05 00:24:54,152 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 00:24:54,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=296, Invalid=1682, Unknown=2, NotChecked=0, Total=1980 [2022-04-05 00:24:54,154 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:24:54,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 216 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-04-05 00:24:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 00:24:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-04-05 00:24:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 00:24:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-05 00:24:54,158 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-04-05 00:24:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:24:54,159 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-05 00:24:54,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 00:24:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-05 00:24:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 00:24:54,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:24:54,160 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:24:54,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 00:24:54,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 00:24:54,371 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:24:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:24:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 483843889, now seen corresponding path program 1 times [2022-04-05 00:24:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:24:54,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243382034] [2022-04-05 00:24:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:24:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:24:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:24:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:24:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 00:24:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 00:24:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 00:24:54,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:24:54,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243382034] [2022-04-05 00:24:54,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243382034] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:24:54,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763486896] [2022-04-05 00:24:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:24:54,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:24:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:24:54,512 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) [2022-04-05 00:24:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 00:24:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:24:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 00:24:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:24:54,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-05 00:24:54,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-05 00:24:54,717 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-04-05 00:24:54,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 28 [2022-04-05 00:24:55,253 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-05 00:24:55,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-04-05 00:24:56,039 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-05 00:24:56,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-04-05 00:24:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 00:24:56,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:25:04,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763486896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:04,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:25:04,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-04-05 00:25:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893554300] [2022-04-05 00:25:04,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:25:04,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 00:25:04,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:25:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 00:25:04,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=597, Unknown=4, NotChecked=0, Total=702 [2022-04-05 00:25:04,897 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-05 00:25:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:25:05,338 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-04-05 00:25:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 00:25:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-04-05 00:25:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:25:05,339 INFO L225 Difference]: With dead ends: 66 [2022-04-05 00:25:05,339 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 00:25:05,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=205, Invalid=1351, Unknown=4, NotChecked=0, Total=1560 [2022-04-05 00:25:05,341 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:25:05,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 132 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 174 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-04-05 00:25:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 00:25:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-04-05 00:25:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 00:25:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-04-05 00:25:05,346 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-04-05 00:25:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:25:05,346 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-04-05 00:25:05,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-05 00:25:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-04-05 00:25:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-05 00:25:05,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:25:05,347 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:25:05,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-05 00:25:05,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:05,568 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:25:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:25:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -926913650, now seen corresponding path program 2 times [2022-04-05 00:25:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:25:05,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199452317] [2022-04-05 00:25:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:25:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:25:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:25:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:25:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:25:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 00:25:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 00:25:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 00:25:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 00:25:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 00:25:05,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:25:05,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199452317] [2022-04-05 00:25:05,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199452317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:05,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100304979] [2022-04-05 00:25:05,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 00:25:05,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:05,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:25:05,680 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) [2022-04-05 00:25:05,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 00:25:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 00:25:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:25:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 00:25:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:25:05,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-05 00:25:05,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-05 00:25:05,933 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-04-05 00:25:05,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 28 [2022-04-05 00:25:07,884 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-05 00:25:07,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-04-05 00:25:08,952 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-05 00:25:08,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-04-05 00:25:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 00:25:09,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:25:13,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100304979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:13,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:25:13,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-04-05 00:25:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502151752] [2022-04-05 00:25:13,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:25:13,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 00:25:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:25:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 00:25:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=749, Unknown=6, NotChecked=0, Total=870 [2022-04-05 00:25:13,104 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-05 00:25:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:25:15,920 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-04-05 00:25:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 00:25:15,920 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-04-05 00:25:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:25:15,921 INFO L225 Difference]: With dead ends: 86 [2022-04-05 00:25:15,921 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 00:25:15,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=238, Invalid=1735, Unknown=7, NotChecked=0, Total=1980 [2022-04-05 00:25:15,922 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:25:15,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 311 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-04-05 00:25:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 00:25:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-04-05 00:25:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 00:25:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-05 00:25:15,942 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-04-05 00:25:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:25:15,942 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-05 00:25:15,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-05 00:25:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-05 00:25:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 00:25:15,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:25:15,943 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:25:15,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 00:25:16,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:16,145 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:25:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:25:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash -635325717, now seen corresponding path program 3 times [2022-04-05 00:25:16,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:25:16,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967586565] [2022-04-05 00:25:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:25:16,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:25:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:25:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:25:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:25:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 00:25:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 00:25:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 00:25:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-05 00:25:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 00:25:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 00:25:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-05 00:25:16,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:25:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967586565] [2022-04-05 00:25:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967586565] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645742662] [2022-04-05 00:25:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 00:25:16,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:25:16,326 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) [2022-04-05 00:25:16,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 00:25:16,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 00:25:16,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:25:16,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-05 00:25:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:25:16,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-05 00:25:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 00:25:16,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-05 00:25:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 00:25:17,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 30 [2022-04-05 00:25:17,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 76 [2022-04-05 00:25:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 00:25:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 00:25:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 00:25:17,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 124 [2022-04-05 00:25:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 00:25:17,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:25:20,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-05 00:25:20,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 00:25:20,122 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 00:25:20,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-05 00:25:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-05 00:25:20,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-04-05 00:25:20,176 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-04-05 00:25:20,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-04-05 00:25:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-05 00:25:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645742662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:25:20,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:25:20,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-04-05 00:25:20,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825668467] [2022-04-05 00:25:20,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:25:20,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 00:25:20,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:25:20,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 00:25:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 00:25:20,534 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-05 00:25:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:25:25,355 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2022-04-05 00:25:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-05 00:25:25,355 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-04-05 00:25:25,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:25:25,357 INFO L225 Difference]: With dead ends: 192 [2022-04-05 00:25:25,357 INFO L226 Difference]: Without dead ends: 192 [2022-04-05 00:25:25,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1059, Invalid=6081, Unknown=0, NotChecked=0, Total=7140 [2022-04-05 00:25:25,359 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 371 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:25:25,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 132 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1811 Invalid, 0 Unknown, 307 Unchecked, 2.0s Time] [2022-04-05 00:25:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-05 00:25:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-04-05 00:25:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 00:25:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-04-05 00:25:25,377 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-04-05 00:25:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:25:25,378 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-04-05 00:25:25,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-05 00:25:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-04-05 00:25:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-05 00:25:25,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:25:25,379 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:25:25,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 00:25:25,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:25,580 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:25:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:25:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash 994030920, now seen corresponding path program 4 times [2022-04-05 00:25:25,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:25:25,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043691275] [2022-04-05 00:25:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:25:25,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:25:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:25:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:25:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:25:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 00:25:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 00:25:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 00:25:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 00:25:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-05 00:25:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-05 00:25:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-05 00:25:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 00:25:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 00:25:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:25:25,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043691275] [2022-04-05 00:25:25,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043691275] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:25,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516636812] [2022-04-05 00:25:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 00:25:25,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:25:25,757 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) [2022-04-05 00:25:25,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 00:25:26,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 00:25:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:25:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 00:25:26,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:25:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-05 00:25:26,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:25:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-05 00:25:26,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516636812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:25:26,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:25:26,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-05 00:25:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484078613] [2022-04-05 00:25:26,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:25:26,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 00:25:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:25:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 00:25:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-04-05 00:25:26,710 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-05 00:25:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:25:28,108 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2022-04-05 00:25:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 00:25:28,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-04-05 00:25:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:25:28,109 INFO L225 Difference]: With dead ends: 159 [2022-04-05 00:25:28,109 INFO L226 Difference]: Without dead ends: 159 [2022-04-05 00:25:28,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-04-05 00:25:28,110 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 00:25:28,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 79 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 00:25:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-05 00:25:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-04-05 00:25:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 00:25:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-04-05 00:25:28,116 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-04-05 00:25:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:25:28,117 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-04-05 00:25:28,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-05 00:25:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-04-05 00:25:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-05 00:25:28,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:25:28,118 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:25:28,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 00:25:28,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:28,319 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:25:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:25:28,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1349749463, now seen corresponding path program 5 times [2022-04-05 00:25:28,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:25:28,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810633210] [2022-04-05 00:25:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:25:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:25:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:25:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:25:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:25:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 00:25:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 00:25:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 00:25:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 00:25:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 00:25:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 00:25:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 00:25:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 00:25:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 00:25:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 00:25:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 00:25:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 00:25:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 00:25:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-05 00:25:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-05 00:25:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:25:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-05 00:25:28,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:25:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810633210] [2022-04-05 00:25:28,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810633210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:25:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302001443] [2022-04-05 00:25:28,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 00:25:28,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:25:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:25:28,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 00:25:28,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 00:26:04,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-04-05 00:26:04,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:26:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 00:26:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:26:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-05 00:26:05,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:26:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-05 00:26:05,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302001443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:26:05,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 00:26:05,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-05 00:26:05,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248615493] [2022-04-05 00:26:05,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 00:26:05,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-05 00:26:05,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:26:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-05 00:26:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 00:26:05,820 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-05 00:26:22,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:26:22,264 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2022-04-05 00:26:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 00:26:22,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-04-05 00:26:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:26:22,266 INFO L225 Difference]: With dead ends: 287 [2022-04-05 00:26:22,266 INFO L226 Difference]: Without dead ends: 287 [2022-04-05 00:26:22,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-04-05 00:26:22,268 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 705 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 00:26:22,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 148 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 00:26:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-05 00:26:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-04-05 00:26:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-05 00:26:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-04-05 00:26:22,298 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-04-05 00:26:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:26:22,299 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-04-05 00:26:22,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-05 00:26:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-04-05 00:26:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-05 00:26:22,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:26:22,302 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:26:22,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 00:26:22,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:26:22,536 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:26:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:26:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1018698857, now seen corresponding path program 6 times [2022-04-05 00:26:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:26:22,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109104046] [2022-04-05 00:26:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:26:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:26:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 00:26:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-05 00:26:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-05 00:26:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-05 00:26:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-05 00:26:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 00:26:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-05 00:26:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-05 00:26:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-05 00:26:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-05 00:26:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-05 00:26:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-05 00:26:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-05 00:26:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-05 00:26:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-05 00:26:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-05 00:26:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 00:26:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-05 00:26:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-05 00:26:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-05 00:26:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-05 00:26:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-05 00:26:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-05 00:26:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-05 00:26:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-04-05 00:26:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-05 00:26:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-05 00:26:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-04-05 00:26:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-05 00:26:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-04-05 00:26:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-04-05 00:26:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-04-05 00:26:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-04-05 00:26:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-05 00:26:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:26:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-05 00:26:23,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:26:23,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109104046] [2022-04-05 00:26:23,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109104046] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 00:26:23,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488767148] [2022-04-05 00:26:23,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 00:26:23,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:26:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:26:23,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 00:26:23,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process