/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-fpi/indp4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:19:24,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:19:24,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:19:24,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:19:24,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:19:24,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:19:24,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:19:24,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:19:24,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:19:24,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:19:24,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:19:24,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:19:24,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:19:24,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:19:24,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:19:24,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:19:24,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:19:24,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:19:24,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:19:24,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:19:24,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:19:24,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:19:24,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:19:24,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:19:24,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:19:24,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:19:24,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:19:24,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:19:24,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:19:24,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:19:24,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:19:24,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:19:24,405 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:19:24,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:19:24,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:19:24,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:19:24,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:19:24,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:19:24,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:19:24,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:19:24,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:19:24,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:19:24,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:19:24,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:19:24,408 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:19:24,408 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:19:24,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:19:24,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:19:24,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:19:24,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:19:24,626 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:19:24,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/indp4.c [2022-01-31 11:19:24,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b872cc71/3ef785de20e04d97892a54b24fe54c1f/FLAGc0151b1da [2022-01-31 11:19:25,048 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:19:25,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/indp4.c [2022-01-31 11:19:25,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b872cc71/3ef785de20e04d97892a54b24fe54c1f/FLAGc0151b1da [2022-01-31 11:19:25,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b872cc71/3ef785de20e04d97892a54b24fe54c1f [2022-01-31 11:19:25,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:19:25,478 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:19:25,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:19:25,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:19:25,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:19:25,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7475caf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25, skipping insertion in model container [2022-01-31 11:19:25,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:19:25,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:19:25,591 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/indp4.c[588,601] [2022-01-31 11:19:25,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:19:25,615 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:19:25,628 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/indp4.c[588,601] [2022-01-31 11:19:25,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:19:25,651 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:19:25,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25 WrapperNode [2022-01-31 11:19:25,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:19:25,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:19:25,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:19:25,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:19:25,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:19:25,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:19:25,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:19:25,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:19:25,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (1/1) ... [2022-01-31 11:19:25,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:19:25,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:19:25,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 11:19:25,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 11:19:25,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:19:25,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:19:25,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:19:25,788 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:19:25,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:19:25,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:19:25,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:19:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:19:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:19:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:19:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:19:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:19:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:19:25,875 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:19:25,877 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:19:26,021 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:19:26,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:19:26,026 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 11:19:26,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:19:26 BoogieIcfgContainer [2022-01-31 11:19:26,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:19:26,028 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:19:26,028 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:19:26,031 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:19:26,033 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:19:26" (1/1) ... [2022-01-31 11:19:26,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:19:26 BasicIcfg [2022-01-31 11:19:26,055 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:19:26,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:19:26,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:19:26,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:19:26,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:19:25" (1/4) ... [2022-01-31 11:19:26,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cea0709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:19:26, skipping insertion in model container [2022-01-31 11:19:26,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:19:25" (2/4) ... [2022-01-31 11:19:26,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cea0709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:19:26, skipping insertion in model container [2022-01-31 11:19:26,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:19:26" (3/4) ... [2022-01-31 11:19:26,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cea0709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:19:26, skipping insertion in model container [2022-01-31 11:19:26,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:19:26" (4/4) ... [2022-01-31 11:19:26,062 INFO L111 eAbstractionObserver]: Analyzing ICFG indp4.cJordan [2022-01-31 11:19:26,066 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:19:26,066 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:19:26,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:19:26,113 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 11:19:26,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:19:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 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) [2022-01-31 11:19:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 11:19:26,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:19:26,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:19:26,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:19:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:19:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1511364421, now seen corresponding path program 1 times [2022-01-31 11:19:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:19:26,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130920235] [2022-01-31 11:19:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:19:26,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:19:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:19:26,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:19:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:19:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:19:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:19:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:19:26,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:19:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130920235] [2022-01-31 11:19:26,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130920235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:19:26,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:19:26,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:19:26,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311567776] [2022-01-31 11:19:26,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:19:26,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:19:26,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:19:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:19:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:19:26,343 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:19:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:19:26,391 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-31 11:19:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:19:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 11:19:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:19:26,398 INFO L225 Difference]: With dead ends: 37 [2022-01-31 11:19:26,399 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 11:19:26,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:19:26,402 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:19:26,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:19:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 11:19:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 11:19:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-01-31 11:19:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 11:19:26,424 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2022-01-31 11:19:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:19:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 11:19:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:19:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 11:19:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 11:19:26,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:19:26,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:19:26,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:19:26,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:19:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:19:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1574252543, now seen corresponding path program 1 times [2022-01-31 11:19:26,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:19:26,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892135685] [2022-01-31 11:19:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:19:26,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:19:26,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:19:26,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125667665] [2022-01-31 11:19:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:19:26,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:19:26,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:19:26,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:19:26,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 11:19:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:19:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 11:19:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:19:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:19:26,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 11:19:26,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:19:26,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892135685] [2022-01-31 11:19:26,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:19:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125667665] [2022-01-31 11:19:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125667665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:19:26,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:19:26,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 11:19:26,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101458464] [2022-01-31 11:19:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:19:26,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 11:19:26,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:19:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 11:19:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 11:19:26,571 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:19:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:19:26,656 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-01-31 11:19:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 11:19:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-01-31 11:19:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:19:26,658 INFO L225 Difference]: With dead ends: 42 [2022-01-31 11:19:26,658 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 11:19:26,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 11:19:26,659 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:19:26,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:19:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 11:19:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-01-31 11:19:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-01-31 11:19:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-01-31 11:19:26,666 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 24 [2022-01-31 11:19:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:19:26,667 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-01-31 11:19:26,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:19:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-01-31 11:19:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 11:19:26,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:19:26,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:19:26,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 11:19:26,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:19:26,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:19:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:19:26,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1521490391, now seen corresponding path program 1 times [2022-01-31 11:19:26,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:19:26,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931594706] [2022-01-31 11:19:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:19:26,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:19:26,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:19:26,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038241605] [2022-01-31 11:19:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:19:26,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:19:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:19:26,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:19:26,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 11:19:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:19:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 11:19:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:19:27,055 INFO L387 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 11 treesize of output 7 [2022-01-31 11:19:27,122 INFO L387 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 23 treesize of output 11 [2022-01-31 11:19:27,179 INFO L387 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 23 treesize of output 11 [2022-01-31 11:19:27,228 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 11:19:27,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 11:19:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:19:27,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:19:27,561 INFO L387 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 57 treesize of output 53 [2022-01-31 11:19:27,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:19:27,569 INFO L387 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 53 treesize of output 60 [2022-01-31 11:19:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 10 [2022-01-31 11:19:40,696 WARN L228 SmtUtils]: Spent 13.10s on a formula simplification that was a NOOP. DAG size: 14 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 11:19:40,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 10 [2022-01-31 11:20:06,908 WARN L228 SmtUtils]: Spent 26.18s on a formula simplification. DAG size of input: 25 DAG size of output: 13 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-31 11:20:06,909 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 11:20:06,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 11:20:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:20:06,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:20:06,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931594706] [2022-01-31 11:20:06,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:20:06,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038241605] [2022-01-31 11:20:06,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038241605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:20:06,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:20:06,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2022-01-31 11:20:06,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356287137] [2022-01-31 11:20:06,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:20:06,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 11:20:06,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:20:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 11:20:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-31 11:20:06,964 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:20:20,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 11:20:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:20:20,129 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-01-31 11:20:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 11:20:20,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 11:20:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:20:20,130 INFO L225 Difference]: With dead ends: 77 [2022-01-31 11:20:20,130 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 11:20:20,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-31 11:20:20,131 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:20:20,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 173 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2022-01-31 11:20:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 11:20:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2022-01-31 11:20:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 49 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:20:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-01-31 11:20:20,138 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 30 [2022-01-31 11:20:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:20:20,138 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-01-31 11:20:20,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:20:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-01-31 11:20:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 11:20:20,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:20:20,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:20:20,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 11:20:20,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 11:20:20,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:20:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:20:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1761797523, now seen corresponding path program 2 times [2022-01-31 11:20:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:20:20,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225554999] [2022-01-31 11:20:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:20:20,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:20:20,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:20:20,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683868865] [2022-01-31 11:20:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:20:20,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:20:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:20:20,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:20:20,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 11:20:20,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:20:20,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:20:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:20:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:20:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 11:20:20,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:20:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 11:20:20,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:20:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225554999] [2022-01-31 11:20:20,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:20:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683868865] [2022-01-31 11:20:20,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683868865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:20:20,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:20:20,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:20:20,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331623827] [2022-01-31 11:20:20,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:20:20,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:20:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:20:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:20:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:20:20,605 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:20:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:20:20,730 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-01-31 11:20:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 11:20:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 11:20:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:20:20,739 INFO L225 Difference]: With dead ends: 106 [2022-01-31 11:20:20,740 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 11:20:20,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:20:20,742 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:20:20,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 96 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:20:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 11:20:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2022-01-31 11:20:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:20:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-01-31 11:20:20,749 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 34 [2022-01-31 11:20:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:20:20,749 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-01-31 11:20:20,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:20:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-01-31 11:20:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 11:20:20,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:20:20,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:20:20,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 11:20:20,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:20:20,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:20:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:20:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash 207275983, now seen corresponding path program 3 times [2022-01-31 11:20:20,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:20:20,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247856347] [2022-01-31 11:20:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:20:20,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:20:20,982 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:20:20,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281151988] [2022-01-31 11:20:20,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:20:20,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:20:20,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:20:20,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:20:20,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 11:20:21,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:20:21,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:20:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 11:20:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:20:21,103 INFO L387 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 62 treesize of output 57 [2022-01-31 11:20:21,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2022-01-31 11:20:21,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 19 [2022-01-31 11:20:21,576 INFO L387 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 219 treesize of output 206 [2022-01-31 11:20:21,662 INFO L353 Elim1Store]: treesize reduction 393, result has 17.3 percent of original size [2022-01-31 11:20:21,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 205 treesize of output 256 [2022-01-31 11:20:22,446 INFO L353 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2022-01-31 11:20:22,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 66