/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-patterns/array9_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:32:16,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:32:16,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:32:16,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:32:16,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:32:16,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:32:16,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:32:16,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:32:16,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:32:16,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:32:16,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:32:16,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:32:16,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:32:16,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:32:16,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:32:16,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:32:16,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:32:16,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:32:16,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:32:16,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:32:16,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:32:16,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:32:16,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:32:16,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:32:16,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:32:16,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:32:16,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:32:16,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:32:16,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:32:16,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:32:16,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:32:16,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:32:16,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:32:16,207 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:32:16,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:32:16,207 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:32:16,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:32:16,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:32:16,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:32:16,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:32:16,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:32:16,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:32:16,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:32:16,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:32:16,209 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:32:16,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:32:16,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:32:16,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:32:16,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:32:16,478 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:32:16,478 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:32:16,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array9_pattern.c [2022-01-31 10:32:16,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1c8552e/a938778f207940ad9d6c97e17838f717/FLAGa2be56480 [2022-01-31 10:32:16,912 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:32:16,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array9_pattern.c [2022-01-31 10:32:16,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1c8552e/a938778f207940ad9d6c97e17838f717/FLAGa2be56480 [2022-01-31 10:32:17,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1c8552e/a938778f207940ad9d6c97e17838f717 [2022-01-31 10:32:17,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:32:17,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:32:17,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:32:17,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:32:17,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:32:17,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d78741a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17, skipping insertion in model container [2022-01-31 10:32:17,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:32:17,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:32:17,513 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-patterns/array9_pattern.c[1352,1365] [2022-01-31 10:32:17,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:32:17,543 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:32:17,554 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-patterns/array9_pattern.c[1352,1365] [2022-01-31 10:32:17,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:32:17,586 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:32:17,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17 WrapperNode [2022-01-31 10:32:17,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:32:17,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:32:17,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:32:17,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:32:17,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:32:17,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:32:17,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:32:17,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:32:17,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (1/1) ... [2022-01-31 10:32:17,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:32:17,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:17,660 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 10:32:17,686 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 10:32:17,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:32:17,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:32:17,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:32:17,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:32:17,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:32:17,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:32:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:32:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:32:17,701 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:32:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:32:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:32:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:32:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:32:17,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:32:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:32:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:32:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:32:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:32:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:32:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:32:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:32:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:32:17,820 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:32:17,821 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:32:17,999 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:32:18,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:32:18,003 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:32:18,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:32:18 BoogieIcfgContainer [2022-01-31 10:32:18,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:32:18,006 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:32:18,006 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:32:18,010 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:32:18,012 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:32:18" (1/1) ... [2022-01-31 10:32:18,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:32:18 BasicIcfg [2022-01-31 10:32:18,031 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:32:18,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:32:18,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:32:18,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:32:18,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:32:17" (1/4) ... [2022-01-31 10:32:18,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c86f4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:32:18, skipping insertion in model container [2022-01-31 10:32:18,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:32:17" (2/4) ... [2022-01-31 10:32:18,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c86f4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:32:18, skipping insertion in model container [2022-01-31 10:32:18,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:32:18" (3/4) ... [2022-01-31 10:32:18,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c86f4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:32:18, skipping insertion in model container [2022-01-31 10:32:18,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:32:18" (4/4) ... [2022-01-31 10:32:18,039 INFO L111 eAbstractionObserver]: Analyzing ICFG array9_pattern.cJordan [2022-01-31 10:32:18,044 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:32:18,044 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:32:18,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:32:18,093 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 10:32:18,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:32:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:32:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 10:32:18,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:18,113 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] [2022-01-31 10:32:18,114 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1577137784, now seen corresponding path program 1 times [2022-01-31 10:32:18,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:18,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031388575] [2022-01-31 10:32:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:18,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:32:18,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:32:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:32:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:32:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:32:18,313 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 10:32:18,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031388575] [2022-01-31 10:32:18,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031388575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:32:18,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:32:18,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:32:18,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170662184] [2022-01-31 10:32:18,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:32:18,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:32:18,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:18,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:32:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:32:18,344 INFO L87 Difference]: Start difference. First operand has 36 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 10:32:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:18,405 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-31 10:32:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:32:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21 [2022-01-31 10:32:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:18,413 INFO L225 Difference]: With dead ends: 36 [2022-01-31 10:32:18,413 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 10:32:18,414 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 10:32:18,417 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:18,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:32:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 10:32:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 10:32:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:32:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 10:32:18,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2022-01-31 10:32:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:18,449 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 10:32:18,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 10:32:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 10:32:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 10:32:18,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:18,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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 10:32:18,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:32:18,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash -271724733, now seen corresponding path program 1 times [2022-01-31 10:32:18,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508603903] [2022-01-31 10:32:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:18,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:18,503 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865547927] [2022-01-31 10:32:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:18,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:18,511 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 10:32:18,518 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 10:32:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:32:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 10:32:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:18,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:32:18,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:18,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508603903] [2022-01-31 10:32:18,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865547927] [2022-01-31 10:32:18,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865547927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:32:18,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:32:18,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 10:32:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961069865] [2022-01-31 10:32:18,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:32:18,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 10:32:18,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 10:32:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:32:18,783 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:18,872 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-01-31 10:32:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:32:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-01-31 10:32:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:18,874 INFO L225 Difference]: With dead ends: 37 [2022-01-31 10:32:18,874 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 10:32:18,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:32:18,876 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:18,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 80 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:32:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 10:32:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-01-31 10:32:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:32:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-01-31 10:32:18,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2022-01-31 10:32:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:18,881 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-01-31 10:32:18,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-01-31 10:32:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 10:32:18,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:18,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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 10:32:18,911 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 10:32:19,108 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 10:32:19,109 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 456737219, now seen corresponding path program 1 times [2022-01-31 10:32:19,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:19,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663821035] [2022-01-31 10:32:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:19,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:19,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:19,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992925733] [2022-01-31 10:32:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:19,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:19,140 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 10:32:19,144 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 10:32:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:32:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 10:32:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:19,273 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 10 treesize of output 8 [2022-01-31 10:32:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:19,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 18 [2022-01-31 10:32:19,334 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 12 treesize of output 11 [2022-01-31 10:32:19,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-01-31 10:32:19,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:32:20,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-01-31 10:32:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:32:20,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2022-01-31 10:32:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:20,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:20,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663821035] [2022-01-31 10:32:20,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:20,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992925733] [2022-01-31 10:32:20,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992925733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:32:20,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:32:20,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-01-31 10:32:20,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149743843] [2022-01-31 10:32:20,727 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:20,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:32:20,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:32:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:32:20,730 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:21,035 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-01-31 10:32:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:32:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-01-31 10:32:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:21,038 INFO L225 Difference]: With dead ends: 58 [2022-01-31 10:32:21,038 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 10:32:21,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:32:21,040 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:21,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 280 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-01-31 10:32:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 10:32:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-01-31 10:32:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:32:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-01-31 10:32:21,052 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2022-01-31 10:32:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:21,053 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-01-31 10:32:21,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-01-31 10:32:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 10:32:21,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:21,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 10:32:21,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 10:32:21,278 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 10:32:21,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1746308063, now seen corresponding path program 2 times [2022-01-31 10:32:21,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066538229] [2022-01-31 10:32:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:21,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:21,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:21,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402341045] [2022-01-31 10:32:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:32:21,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:21,309 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 10:32:21,310 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 10:32:21,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:32:21,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:21,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:32:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:21,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:32:21,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066538229] [2022-01-31 10:32:21,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402341045] [2022-01-31 10:32:21,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402341045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:32:21,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:32:21,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:32:21,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078325811] [2022-01-31 10:32:21,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:32:21,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:32:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:32:21,569 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:21,678 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-01-31 10:32:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:32:21,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-01-31 10:32:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:21,679 INFO L225 Difference]: With dead ends: 61 [2022-01-31 10:32:21,679 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 10:32:21,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:32:21,681 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:21,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:32:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 10:32:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-31 10:32:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:32:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-01-31 10:32:21,685 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 36 [2022-01-31 10:32:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:21,685 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-01-31 10:32:21,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-01-31 10:32:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 10:32:21,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:21,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 10:32:21,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 10:32:21,887 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 10:32:21,887 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1542734119, now seen corresponding path program 3 times [2022-01-31 10:32:21,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34420307] [2022-01-31 10:32:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:21,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:21,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:21,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638426321] [2022-01-31 10:32:21,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:32:21,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:21,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:21,919 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 10:32:21,922 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 10:32:22,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 10:32:22,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:32:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:22,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:32:22,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34420307] [2022-01-31 10:32:22,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:22,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638426321] [2022-01-31 10:32:22,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638426321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:32:22,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:32:22,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:32:22,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315408689] [2022-01-31 10:32:22,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:22,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:32:22,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:32:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:32:22,170 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:22,250 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-01-31 10:32:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:32:22,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-01-31 10:32:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:22,255 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:32:22,255 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 10:32:22,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:32:22,262 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:22,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 75 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:32:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 10:32:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 10:32:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:32:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 10:32:22,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2022-01-31 10:32:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:22,267 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 10:32:22,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 10:32:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 10:32:22,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:22,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 10:32:22,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:32:22,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:22,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1712276035, now seen corresponding path program 4 times [2022-01-31 10:32:22,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:22,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43068144] [2022-01-31 10:32:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:22,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:22,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:22,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761955298] [2022-01-31 10:32:22,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:32:22,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:22,490 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:32:22,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 10:32:22,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:32:22,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:22,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 10:32:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:22,646 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 10 treesize of output 8 [2022-01-31 10:32:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:22,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 18 [2022-01-31 10:32:22,672 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 12 treesize of output 11 [2022-01-31 10:32:22,744 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 10:32:22,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 52 treesize of output 38 [2022-01-31 10:32:27,755 INFO L353 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-01-31 10:32:27,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 67 [2022-01-31 10:32:28,167 INFO L353 Elim1Store]: treesize reduction 99, result has 42.4 percent of original size [2022-01-31 10:32:28,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 132 [2022-01-31 10:32:32,535 INFO L353 Elim1Store]: treesize reduction 162, result has 41.1 percent of original size [2022-01-31 10:32:32,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 131 treesize of output 166 [2022-01-31 10:32:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:33,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:44,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43068144] [2022-01-31 10:32:44,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761955298] [2022-01-31 10:32:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761955298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:32:44,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:32:44,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-01-31 10:32:44,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645280656] [2022-01-31 10:32:44,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:44,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:32:44,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:32:44,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1019, Unknown=6, NotChecked=0, Total=1190 [2022-01-31 10:32:44,914 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:50,340 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-01-31 10:32:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:32:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-01-31 10:32:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:50,342 INFO L225 Difference]: With dead ends: 61 [2022-01-31 10:32:50,342 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 10:32:50,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=219, Invalid=1332, Unknown=9, NotChecked=0, Total=1560 [2022-01-31 10:32:50,344 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:50,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 386 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-01-31 10:32:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 10:32:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-01-31 10:32:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:32:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-01-31 10:32:50,350 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 38 [2022-01-31 10:32:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:50,350 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-01-31 10:32:50,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-01-31 10:32:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 10:32:50,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:50,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 10:32:50,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 10:32:50,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:50,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1418873028, now seen corresponding path program 1 times [2022-01-31 10:32:50,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:50,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974207166] [2022-01-31 10:32:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:50,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:50,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:50,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785879689] [2022-01-31 10:32:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:50,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:50,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:50,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:32:50,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 10:32:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:32:50,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-31 10:32:50,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:50,780 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 10 treesize of output 8 [2022-01-31 10:32:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:50,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:32:50,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:32:50,827 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 12 treesize of output 11 [2022-01-31 10:32:50,832 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 12 treesize of output 11 [2022-01-31 10:32:50,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:50,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-31 10:32:51,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:51,553 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-31 10:32:51,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2022-01-31 10:32:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:32:51,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-01-31 10:32:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:52,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:32:52,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2022-01-31 10:32:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:52,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:55,241 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_div_main_~index~0_21 Int) (aux_mod_main_~index~0_21 Int) (v_ArrVal_251 Int) (v_ArrVal_249 Int)) (let ((.cse0 (+ (* 3 aux_div_main_~index~0_21) aux_mod_main_~index~0_21))) (or (<= c_~ARR_SIZE~0 .cse0) (<= (let ((.cse4 (* aux_div_main_~index~0_21 12)) (.cse5 (* aux_mod_main_~index~0_21 4))) (let ((.cse3 (store |c_#memory_int| |c_main_~#array1~0.base| (store (select |c_#memory_int| |c_main_~#array1~0.base|) (+ .cse4 |c_main_~#array1~0.offset| .cse5) v_ArrVal_249)))) (let ((.cse2 (store (select .cse3 |c_main_~#array2~0.base|) (+ .cse4 |c_main_~#array2~0.offset| .cse5) v_ArrVal_251))) (let ((.cse1 (select (store .cse3 |c_main_~#array2~0.base| .cse2) |c_main_~#array1~0.base|))) (+ (select .cse1 |c_main_~#array1~0.offset|) (select .cse2 (+ |c_main_~#array2~0.offset| 4)) (select .cse1 (+ |c_main_~#array1~0.offset| 4)) (select .cse2 |c_main_~#array2~0.offset|) c_main_~sum~0))))) (div (+ c_~ARR_SIZE~0 2) 3)) (< (* c_main_~count~0 c_main_~num~0) v_ArrVal_251) (> 0 aux_mod_main_~index~0_21) (= aux_mod_main_~index~0_21 0) (>= aux_mod_main_~index~0_21 3) (< .cse0 0) (not (<= v_ArrVal_249 (* c_main_~count~0 c_main_~num~0 c_main_~num~0)))))) is different from false [2022-01-31 10:32:55,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974207166] [2022-01-31 10:32:55,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785879689] [2022-01-31 10:32:55,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785879689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:32:55,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:32:55,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-01-31 10:32:55,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86217316] [2022-01-31 10:32:55,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:55,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 10:32:55,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 10:32:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=734, Unknown=1, NotChecked=56, Total=930 [2022-01-31 10:32:55,248 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:57,434 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-01-31 10:32:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:32:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-01-31 10:32:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:57,435 INFO L225 Difference]: With dead ends: 89 [2022-01-31 10:32:57,435 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 10:32:57,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=4, NotChecked=66, Total=1260 [2022-01-31 10:32:57,436 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:57,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 353 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-01-31 10:32:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 10:32:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2022-01-31 10:32:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:32:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 10:32:57,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 38 [2022-01-31 10:32:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:57,445 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 10:32:57,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:32:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 10:32:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:32:57,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:57,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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 10:32:57,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 10:32:57,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:57,652 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1433300063, now seen corresponding path program 5 times [2022-01-31 10:32:57,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327284069] [2022-01-31 10:32:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:57,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:57,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:57,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581628375] [2022-01-31 10:32:57,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:32:57,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:57,672 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) [2022-01-31 10:32:57,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 10:32:57,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 10:32:57,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:32:57,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:57,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:32:57,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:57,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327284069] [2022-01-31 10:32:57,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:57,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581628375] [2022-01-31 10:32:57,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581628375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:32:57,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:32:57,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:32:57,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257483223] [2022-01-31 10:32:57,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:57,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:32:57,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:32:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:32:57,992 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:58,134 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-01-31 10:32:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:32:58,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 10:32:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:58,135 INFO L225 Difference]: With dead ends: 100 [2022-01-31 10:32:58,135 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 10:32:58,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 10:32:58,136 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:58,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 163 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:32:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 10:32:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2022-01-31 10:32:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:32:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-01-31 10:32:58,149 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 40 [2022-01-31 10:32:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:58,149 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-01-31 10:32:58,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-01-31 10:32:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:32:58,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:58,150 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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 10:32:58,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 10:32:58,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:58,360 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1221134808, now seen corresponding path program 2 times [2022-01-31 10:32:58,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:58,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331993215] [2022-01-31 10:32:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:58,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:58,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:58,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937672366] [2022-01-31 10:32:58,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:32:58,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:58,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:58,379 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) [2022-01-31 10:32:58,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 10:32:58,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:32:58,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:32:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:32:58,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:32:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:32:58,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:32:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331993215] [2022-01-31 10:32:58,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:32:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937672366] [2022-01-31 10:32:58,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937672366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:32:58,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:32:58,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:32:58,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842532605] [2022-01-31 10:32:58,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:32:58,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:32:58,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:32:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:32:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:32:58,648 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:32:58,806 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-01-31 10:32:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:32:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 10:32:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:32:58,808 INFO L225 Difference]: With dead ends: 92 [2022-01-31 10:32:58,808 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 10:32:58,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:32:58,809 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:32:58,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 152 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:32:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 10:32:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2022-01-31 10:32:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:32:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-01-31 10:32:58,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 40 [2022-01-31 10:32:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:32:58,815 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-01-31 10:32:58,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:32:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-01-31 10:32:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 10:32:58,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:32:58,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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 10:32:58,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 10:32:59,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 10:32:59,024 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:32:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:32:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1583525693, now seen corresponding path program 6 times [2022-01-31 10:32:59,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:32:59,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167167602] [2022-01-31 10:32:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:32:59,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:32:59,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:32:59,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543516397] [2022-01-31 10:32:59,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:32:59,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:32:59,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:32:59,046 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:32:59,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 10:32:59,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 10:32:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:32:59,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-31 10:32:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:32:59,175 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 10 treesize of output 8 [2022-01-31 10:32:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:32:59,218 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 12 treesize of output 11 [2022-01-31 10:32:59,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 26 [2022-01-31 10:32:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:32:59,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:32:59,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-01-31 10:33:00,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,156 INFO L353 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-01-31 10:33:00,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2022-01-31 10:33:00,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:00,450 INFO L353 Elim1Store]: treesize reduction 164, result has 13.7 percent of original size [2022-01-31 10:33:00,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 103 treesize of output 112 [2022-01-31 10:33:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:33:01,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 49 [2022-01-31 10:33:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:33:01,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:33:02,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:33:02,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167167602] [2022-01-31 10:33:02,522 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:33:02,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543516397] [2022-01-31 10:33:02,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543516397] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:33:02,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:33:02,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-01-31 10:33:02,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605684214] [2022-01-31 10:33:02,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:33:02,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 10:33:02,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:33:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 10:33:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 10:33:02,524 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:33:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:33:04,064 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-01-31 10:33:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:33:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-01-31 10:33:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:33:04,065 INFO L225 Difference]: With dead ends: 101 [2022-01-31 10:33:04,066 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 10:33:04,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 10:33:04,067 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:33:04,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 418 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 510 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-01-31 10:33:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 10:33:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2022-01-31 10:33:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:33:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2022-01-31 10:33:04,073 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 42 [2022-01-31 10:33:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:33:04,074 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2022-01-31 10:33:04,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:33:04,074 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2022-01-31 10:33:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 10:33:04,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:33:04,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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 10:33:04,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 10:33:04,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 10:33:04,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:33:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:33:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -75973884, now seen corresponding path program 3 times [2022-01-31 10:33:04,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:33:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404444941] [2022-01-31 10:33:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:33:04,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:33:04,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:33:04,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321134606] [2022-01-31 10:33:04,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:33:04,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:33:04,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:33:04,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:33:04,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 10:33:04,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:33:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:33:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 66 conjunts are in the unsatisfiable core [2022-01-31 10:33:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:33:04,494 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 10 treesize of output 8 [2022-01-31 10:33:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:33:04,525 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 12 treesize of output 11 [2022-01-31 10:33:04,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 26 [2022-01-31 10:33:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-01-31 10:33:04,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-31 10:33:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,613 INFO L387 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 16 treesize of output 20 [2022-01-31 10:33:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,619 INFO L387 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 16 treesize of output 20 [2022-01-31 10:33:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2022-01-31 10:33:04,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-01-31 10:33:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,744 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-31 10:33:04,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 46 [2022-01-31 10:33:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:04,776 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-31 10:33:04,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 46 [2022-01-31 10:33:10,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:10,220 INFO L353 Elim1Store]: treesize reduction 102, result has 40.0 percent of original size [2022-01-31 10:33:10,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 76 treesize of output 130 [2022-01-31 10:33:12,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:12,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:12,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:12,807 INFO L353 Elim1Store]: treesize reduction 110, result has 32.5 percent of original size [2022-01-31 10:33:12,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 173 [2022-01-31 10:33:24,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:24,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:24,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:24,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:33:24,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 8 case distinctions, treesize of input 153 treesize of output 189 [2022-01-31 10:33:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:33:25,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:33:35,988 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_div_main_~index~0_21 Int) (v_ArrVal_498 Int) (v_ArrVal_496 Int) (aux_mod_main_~index~0_21 Int) (v_main_~count~0_89 Int)) (let ((.cse0 (+ (* 3 aux_div_main_~index~0_21) aux_mod_main_~index~0_21))) (or (not (<= 2 v_main_~count~0_89)) (<= c_~ARR_SIZE~0 .cse0) (not (< v_main_~count~0_89 c_~ARR_SIZE~0)) (not (<= v_ArrVal_496 (* c_main_~count~0 c_main_~num~0 c_main_~num~0))) (<= (let ((.cse5 (* aux_div_main_~index~0_21 12)) (.cse6 (* aux_mod_main_~index~0_21 4))) (let ((.cse4 (store |c_#memory_int| |c_main_~#array1~0.base| (store (select |c_#memory_int| |c_main_~#array1~0.base|) (+ .cse5 |c_main_~#array1~0.offset| .cse6) v_ArrVal_496)))) (let ((.cse2 (store (select .cse4 |c_main_~#array2~0.base|) (+ .cse5 |c_main_~#array2~0.offset| .cse6) v_ArrVal_498))) (let ((.cse1 (select (store .cse4 |c_main_~#array2~0.base| .cse2) |c_main_~#array1~0.base|)) (.cse3 (* v_main_~count~0_89 4))) (+ (select .cse1 (+ |c_main_~#array1~0.offset| 4)) (select .cse2 (+ |c_main_~#array2~0.offset| 4)) (select .cse1 |c_main_~#array1~0.offset|) (select .cse2 (+ .cse3 |c_main_~#array2~0.offset|)) (select .cse1 (+ .cse3 |c_main_~#array1~0.offset|)) c_main_~sum~0 (select .cse2 |c_main_~#array2~0.offset|)))))) (div (+ c_~ARR_SIZE~0 2) 3)) (< (* c_main_~count~0 c_main_~num~0) v_ArrVal_498) (> 0 aux_mod_main_~index~0_21) (= aux_mod_main_~index~0_21 0) (< (+ v_main_~count~0_89 1) c_~ARR_SIZE~0) (>= aux_mod_main_~index~0_21 3) (< .cse0 0)))) is different from false [2022-01-31 10:33:35,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:33:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404444941] [2022-01-31 10:33:35,993 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:33:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321134606] [2022-01-31 10:33:35,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321134606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:33:35,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:33:35,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-01-31 10:33:35,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636456333] [2022-01-31 10:33:35,994 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:33:35,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:33:35,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:33:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:33:35,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1287, Unknown=9, NotChecked=74, Total=1560 [2022-01-31 10:33:35,995 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:33:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:33:37,404 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2022-01-31 10:33:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 10:33:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-01-31 10:33:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:33:37,405 INFO L225 Difference]: With dead ends: 113 [2022-01-31 10:33:37,405 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 10:33:37,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=217, Invalid=1669, Unknown=10, NotChecked=84, Total=1980 [2022-01-31 10:33:37,407 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:33:37,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 557 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 312 Unchecked, 0.1s Time] [2022-01-31 10:33:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 10:33:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2022-01-31 10:33:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:33:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2022-01-31 10:33:37,412 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 42 [2022-01-31 10:33:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:33:37,413 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2022-01-31 10:33:37,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:33:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2022-01-31 10:33:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 10:33:37,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:33:37,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 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 10:33:37,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:33:37,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 10:33:37,628 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:33:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:33:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash -441263393, now seen corresponding path program 7 times [2022-01-31 10:33:37,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:33:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7597063] [2022-01-31 10:33:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:33:37,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:33:37,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:33:37,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746568054] [2022-01-31 10:33:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:33:37,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:33:37,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:33:37,645 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:33:37,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 10:33:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:33:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:33:37,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:33:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:33:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:33:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:33:37,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:33:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7597063] [2022-01-31 10:33:37,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:33:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746568054] [2022-01-31 10:33:37,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746568054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:33:37,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:33:37,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 10:33:37,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589188196] [2022-01-31 10:33:37,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:33:37,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:33:37,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:33:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:33:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:33:37,940 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:33:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:33:38,197 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2022-01-31 10:33:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:33:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-01-31 10:33:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:33:38,198 INFO L225 Difference]: With dead ends: 138 [2022-01-31 10:33:38,199 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 10:33:38,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:33:38,199 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 127 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:33:38,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 149 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:33:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 10:33:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2022-01-31 10:33:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 90 states have internal predecessors, (104), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:33:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2022-01-31 10:33:38,205 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 44 [2022-01-31 10:33:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:33:38,205 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2022-01-31 10:33:38,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:33:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2022-01-31 10:33:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 10:33:38,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:33:38,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 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 10:33:38,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 10:33:38,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 10:33:38,416 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:33:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:33:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash -142600600, now seen corresponding path program 4 times [2022-01-31 10:33:38,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:33:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754465728] [2022-01-31 10:33:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:33:38,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:33:38,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:33:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761154083] [2022-01-31 10:33:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:33:38,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:33:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:33:38,441 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:33:38,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:33:38,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:33:38,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:33:38,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:33:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:33:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:33:38,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:33:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:33:38,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:33:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754465728] [2022-01-31 10:33:38,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:33:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761154083] [2022-01-31 10:33:38,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761154083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:33:38,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:33:38,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 10:33:38,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996235510] [2022-01-31 10:33:38,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:33:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:33:38,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:33:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:33:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:33:38,783 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:33:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:33:39,010 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2022-01-31 10:33:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 10:33:39,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-01-31 10:33:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:33:39,011 INFO L225 Difference]: With dead ends: 128 [2022-01-31 10:33:39,012 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 10:33:39,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:33:39,013 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:33:39,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 229 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:33:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 10:33:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2022-01-31 10:33:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 81 states have internal predecessors, (93), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:33:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2022-01-31 10:33:39,017 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 44 [2022-01-31 10:33:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:33:39,018 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2022-01-31 10:33:39,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:33:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2022-01-31 10:33:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 10:33:39,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:33:39,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 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 10:33:39,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 10:33:39,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 10:33:39,235 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:33:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:33:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash -45028029, now seen corresponding path program 8 times [2022-01-31 10:33:39,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:33:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687540398] [2022-01-31 10:33:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:33:39,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:33:39,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:33:39,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204651442] [2022-01-31 10:33:39,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:33:39,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:33:39,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:33:39,263 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:33:39,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:33:39,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:33:39,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:33:39,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 89 conjunts are in the unsatisfiable core [2022-01-31 10:33:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:33:39,419 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 10 treesize of output 8 [2022-01-31 10:33:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:33:39,465 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 12 treesize of output 11 [2022-01-31 10:33:39,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 26 [2022-01-31 10:33:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-31 10:33:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-01-31 10:33:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:39,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2022-01-31 10:33:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:41,210 INFO L353 Elim1Store]: treesize reduction 90, result has 39.6 percent of original size [2022-01-31 10:33:41,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2022-01-31 10:33:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:33:43,487 INFO L353 Elim1Store]: treesize reduction 222, result has 13.6 percent of original size [2022-01-31 10:33:43,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 127 treesize of output 142 [2022-01-31 10:33:51,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 72 [2022-01-31 10:33:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:33:51,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:33:59,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:33:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687540398] [2022-01-31 10:33:59,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:33:59,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204651442] [2022-01-31 10:33:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204651442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:33:59,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:33:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-01-31 10:33:59,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58866325] [2022-01-31 10:33:59,938 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:33:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:33:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:33:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:33:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1509, Unknown=10, NotChecked=0, Total=1722 [2022-01-31 10:33:59,939 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:34:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:34:02,002 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-01-31 10:34:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:34:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-01-31 10:34:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:34:02,004 INFO L225 Difference]: With dead ends: 137 [2022-01-31 10:34:02,004 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 10:34:02,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=235, Invalid=1734, Unknown=11, NotChecked=0, Total=1980 [2022-01-31 10:34:02,006 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:34:02,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 448 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 634 Invalid, 0 Unknown, 48 Unchecked, 0.9s Time] [2022-01-31 10:34:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 10:34:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2022-01-31 10:34:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 95 states have internal predecessors, (110), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:34:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-01-31 10:34:02,011 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 46 [2022-01-31 10:34:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:34:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-01-31 10:34:02,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:34:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-01-31 10:34:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 10:34:02,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:34:02,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 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 10:34:02,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:34:02,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 10:34:02,219 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:34:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:34:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1308281668, now seen corresponding path program 5 times [2022-01-31 10:34:02,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:34:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169625095] [2022-01-31 10:34:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:34:02,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:34:02,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:34:02,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200648987] [2022-01-31 10:34:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:34:02,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:34:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:34:02,235 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:34:02,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:34:02,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 10:34:02,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:34:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 91 conjunts are in the unsatisfiable core [2022-01-31 10:34:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:34:02,480 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 10 treesize of output 8 [2022-01-31 10:34:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:34:02,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:34:02,517 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 12 treesize of output 11 [2022-01-31 10:34:02,521 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 12 treesize of output 11 [2022-01-31 10:34:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:34:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-01-31 10:34:02,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:02,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2022-01-31 10:34:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:03,909 INFO L353 Elim1Store]: treesize reduction 90, result has 39.6 percent of original size [2022-01-31 10:34:03,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2022-01-31 10:34:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:05,599 INFO L353 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2022-01-31 10:34:05,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 164 [2022-01-31 10:34:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:12,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:34:12,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 148 treesize of output 128 [2022-01-31 10:34:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:34:13,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:34:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:34:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169625095] [2022-01-31 10:34:28,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:34:28,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200648987] [2022-01-31 10:34:28,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200648987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:34:28,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:34:28,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-01-31 10:34:28,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487785785] [2022-01-31 10:34:28,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:34:28,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 10:34:28,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:34:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 10:34:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1508, Unknown=4, NotChecked=0, Total=1722 [2022-01-31 10:34:28,609 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:34:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:34:30,085 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2022-01-31 10:34:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:34:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-01-31 10:34:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:34:30,087 INFO L225 Difference]: With dead ends: 140 [2022-01-31 10:34:30,087 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 10:34:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=259, Invalid=1806, Unknown=5, NotChecked=0, Total=2070 [2022-01-31 10:34:30,088 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:34:30,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 422 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 331 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2022-01-31 10:34:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 10:34:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2022-01-31 10:34:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 95 states have internal predecessors, (110), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:34:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-01-31 10:34:30,093 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 46 [2022-01-31 10:34:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:34:30,093 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-01-31 10:34:30,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:34:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-01-31 10:34:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:34:30,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:34:30,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:34:30,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 10:34:30,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:34:30,299 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:34:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:34:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash -316585203, now seen corresponding path program 1 times [2022-01-31 10:34:30,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:34:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362502367] [2022-01-31 10:34:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:34:30,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:34:30,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:34:30,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811886997] [2022-01-31 10:34:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:34:30,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:34:30,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:34:30,328 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:34:30,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:34:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:34:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-31 10:34:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:34:30,541 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 10 treesize of output 8 [2022-01-31 10:34:30,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 18 [2022-01-31 10:34:30,570 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 12 treesize of output 11 [2022-01-31 10:34:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:30,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-01-31 10:34:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,042 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 10:34:31,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2022-01-31 10:34:31,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,229 INFO L353 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-01-31 10:34:31,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 46 [2022-01-31 10:34:31,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:31,652 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 10:34:31,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2022-01-31 10:34:32,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:32,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2022-01-31 10:34:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:32,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2022-01-31 10:34:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 10:34:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:34:35,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:34:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362502367] [2022-01-31 10:34:35,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:34:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811886997] [2022-01-31 10:34:35,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811886997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:34:35,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:34:35,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-01-31 10:34:35,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875808943] [2022-01-31 10:34:35,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:34:35,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:34:35,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:34:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:34:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=915, Unknown=1, NotChecked=0, Total=1056 [2022-01-31 10:34:35,413 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:34:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:34:36,933 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2022-01-31 10:34:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:34:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-01-31 10:34:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:34:36,934 INFO L225 Difference]: With dead ends: 137 [2022-01-31 10:34:36,934 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 10:34:36,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=254, Invalid=1466, Unknown=2, NotChecked=0, Total=1722 [2022-01-31 10:34:36,935 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:34:36,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 370 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 227 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-01-31 10:34:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 10:34:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2022-01-31 10:34:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 103 states have internal predecessors, (119), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:34:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2022-01-31 10:34:36,939 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 48 [2022-01-31 10:34:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:34:36,939 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2022-01-31 10:34:36,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:34:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2022-01-31 10:34:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:34:36,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:34:36,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:34:36,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-31 10:34:37,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:34:37,148 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:34:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:34:37,148 INFO L85 PathProgramCache]: Analyzing trace with hash -609988210, now seen corresponding path program 1 times [2022-01-31 10:34:37,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:34:37,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777812163] [2022-01-31 10:34:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:34:37,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:34:37,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:34:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633668820] [2022-01-31 10:34:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:34:37,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:34:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:34:37,160 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:34:37,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:34:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:34:37,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 80 conjunts are in the unsatisfiable core [2022-01-31 10:34:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:34:37,393 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 10 treesize of output 8 [2022-01-31 10:34:37,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:37,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:34:37,422 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 12 treesize of output 11 [2022-01-31 10:34:37,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 26 [2022-01-31 10:34:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:37,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-01-31 10:34:37,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:38,016 INFO L353 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-01-31 10:34:38,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 72 [2022-01-31 10:34:39,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:39,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:39,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:39,441 INFO L353 Elim1Store]: treesize reduction 224, result has 12.8 percent of original size [2022-01-31 10:34:39,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 63 treesize of output 59 [2022-01-31 10:34:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:52,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:52,188 INFO L353 Elim1Store]: treesize reduction 232, result has 18.6 percent of original size [2022-01-31 10:34:52,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 83 [2022-01-31 10:34:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:55,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:55,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:55,221 INFO L353 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2022-01-31 10:34:55,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 64 treesize of output 72 [2022-01-31 10:34:55,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:34:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:34:55,858 INFO L353 Elim1Store]: treesize reduction 148, result has 11.9 percent of original size [2022-01-31 10:34:55,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 64 treesize of output 41 [2022-01-31 10:34:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:34:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:35:00,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:35:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777812163] [2022-01-31 10:35:00,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:35:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633668820] [2022-01-31 10:35:00,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633668820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:35:00,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:35:00,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-01-31 10:35:00,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846150950] [2022-01-31 10:35:00,723 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:35:00,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 10:35:00,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:35:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 10:35:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1198, Unknown=21, NotChecked=0, Total=1406 [2022-01-31 10:35:00,724 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:35:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:35:05,136 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2022-01-31 10:35:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:35:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-01-31 10:35:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:35:05,137 INFO L225 Difference]: With dead ends: 146 [2022-01-31 10:35:05,137 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 10:35:05,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=208, Invalid=1407, Unknown=25, NotChecked=0, Total=1640 [2022-01-31 10:35:05,138 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:35:05,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 481 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 282 Unchecked, 0.2s Time] [2022-01-31 10:35:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 10:35:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-01-31 10:35:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:35:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2022-01-31 10:35:05,142 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 48 [2022-01-31 10:35:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:35:05,143 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2022-01-31 10:35:05,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:35:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2022-01-31 10:35:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:35:05,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:35:05,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:35:05,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-31 10:35:05,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 10:35:05,356 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:35:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:35:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash 928179278, now seen corresponding path program 2 times [2022-01-31 10:35:05,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:35:05,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644885088] [2022-01-31 10:35:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:35:05,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:35:05,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:35:05,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012207437] [2022-01-31 10:35:05,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:35:05,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:35:05,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:35:05,385 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:35:05,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:35:05,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:35:05,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:35:05,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 10:35:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:35:05,559 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 10 treesize of output 8 [2022-01-31 10:35:05,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:05,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 18 [2022-01-31 10:35:05,593 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 12 treesize of output 11 [2022-01-31 10:35:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:05,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-01-31 10:35:06,070 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 10:35:06,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 40 [2022-01-31 10:35:07,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:07,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 43 treesize of output 45 [2022-01-31 10:35:12,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:12,300 INFO L353 Elim1Store]: treesize reduction 34, result has 43.3 percent of original size [2022-01-31 10:35:12,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 70 [2022-01-31 10:35:14,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:35:14,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:14,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:14,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 65 [2022-01-31 10:35:17,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:35:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:17,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:35:17,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 22 [2022-01-31 10:35:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:35:17,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:35:24,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:35:24,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644885088] [2022-01-31 10:35:24,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:35:24,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012207437] [2022-01-31 10:35:24,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012207437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:35:24,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:35:24,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-01-31 10:35:24,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078549608] [2022-01-31 10:35:24,192 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:35:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 10:35:24,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:35:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 10:35:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1225, Unknown=19, NotChecked=0, Total=1406 [2022-01-31 10:35:24,193 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:35:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:35:26,029 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2022-01-31 10:35:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 10:35:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-01-31 10:35:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:35:26,031 INFO L225 Difference]: With dead ends: 157 [2022-01-31 10:35:26,031 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 10:35:26,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=202, Invalid=1500, Unknown=20, NotChecked=0, Total=1722 [2022-01-31 10:35:26,032 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:35:26,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 422 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-01-31 10:35:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 10:35:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-01-31 10:35:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 119 states have internal predecessors, (137), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 10:35:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2022-01-31 10:35:26,037 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 48 [2022-01-31 10:35:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:35:26,037 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2022-01-31 10:35:26,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:35:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2022-01-31 10:35:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:35:26,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:35:26,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:35:26,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:35:26,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:35:26,244 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:35:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:35:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 634776271, now seen corresponding path program 1 times [2022-01-31 10:35:26,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:35:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954838373] [2022-01-31 10:35:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:35:26,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:35:26,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:35:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234674783] [2022-01-31 10:35:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:35:26,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:35:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:35:26,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:35:26,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:35:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:35:26,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 10:35:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:35:26,436 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 10 treesize of output 8 [2022-01-31 10:35:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:26,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:35:26,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:35:26,475 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 12 treesize of output 11 [2022-01-31 10:35:26,480 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 12 treesize of output 11 [2022-01-31 10:35:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:26,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:26,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-31 10:35:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:27,052 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-31 10:35:27,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 56 [2022-01-31 10:35:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:28,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 55 [2022-01-31 10:35:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:33,878 INFO L353 Elim1Store]: treesize reduction 59, result has 40.4 percent of original size [2022-01-31 10:35:33,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 93 [2022-01-31 10:35:35,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:35:35,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:35,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:35:35,704 INFO L353 Elim1Store]: treesize reduction 242, result has 22.9 percent of original size [2022-01-31 10:35:35,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 106 [2022-01-31 10:35:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:35:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:35:39,322 INFO L353 Elim1Store]: treesize reduction 160, result has 28.3 percent of original size [2022-01-31 10:35:39,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 96 [2022-01-31 10:35:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:35:39,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:36:00,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:36:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954838373] [2022-01-31 10:36:00,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:36:00,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234674783] [2022-01-31 10:36:00,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234674783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:36:00,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:36:00,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-01-31 10:36:00,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686355843] [2022-01-31 10:36:00,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:36:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 10:36:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:36:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 10:36:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1216, Unknown=20, NotChecked=0, Total=1406 [2022-01-31 10:36:00,980 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:36:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:36:03,631 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2022-01-31 10:36:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:36:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-01-31 10:36:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:36:03,633 INFO L225 Difference]: With dead ends: 166 [2022-01-31 10:36:03,633 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 10:36:03,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=209, Invalid=1491, Unknown=22, NotChecked=0, Total=1722 [2022-01-31 10:36:03,634 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:36:03,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 401 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 196 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-01-31 10:36:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 10:36:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2022-01-31 10:36:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 119 states have internal predecessors, (137), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 10:36:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2022-01-31 10:36:03,638 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 48 [2022-01-31 10:36:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:36:03,639 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2022-01-31 10:36:03,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 24 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:36:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2022-01-31 10:36:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:36:03,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:36:03,640 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 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 10:36:03,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 10:36:03,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:36:03,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:36:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:36:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash 586241887, now seen corresponding path program 9 times [2022-01-31 10:36:03,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:36:03,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544120049] [2022-01-31 10:36:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:36:03,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:36:03,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:36:03,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345867299] [2022-01-31 10:36:03,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:36:03,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:36:03,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:36:03,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:36:03,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:36:04,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 10:36:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:36:04,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:36:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:36:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:36:04,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:36:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:36:04,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:36:04,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544120049] [2022-01-31 10:36:04,409 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:36:04,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345867299] [2022-01-31 10:36:04,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345867299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:36:04,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:36:04,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-31 10:36:04,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602309034] [2022-01-31 10:36:04,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:36:04,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:36:04,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:36:04,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:36:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:36:04,411 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:36:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:36:04,808 INFO L93 Difference]: Finished difference Result 188 states and 206 transitions. [2022-01-31 10:36:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:36:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-01-31 10:36:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:36:04,809 INFO L225 Difference]: With dead ends: 188 [2022-01-31 10:36:04,809 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 10:36:04,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:36:04,810 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 122 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:36:04,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 191 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:36:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 10:36:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2022-01-31 10:36:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 127 states have internal predecessors, (146), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:36:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-01-31 10:36:04,823 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 48 [2022-01-31 10:36:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:36:04,823 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-01-31 10:36:04,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:36:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-01-31 10:36:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:36:04,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:36:04,824 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 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 10:36:04,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 10:36:05,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:36:05,036 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:36:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:36:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1514932569, now seen corresponding path program 10 times [2022-01-31 10:36:05,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:36:05,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139162586] [2022-01-31 10:36:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:36:05,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:36:05,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:36:05,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741077835] [2022-01-31 10:36:05,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:36:05,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:36:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:36:05,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:36:05,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:36:05,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:36:05,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:36:05,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:36:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:36:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:36:05,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:36:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:36:05,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:36:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139162586] [2022-01-31 10:36:05,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:36:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741077835] [2022-01-31 10:36:05,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741077835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:36:05,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:36:05,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-31 10:36:05,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526725890] [2022-01-31 10:36:05,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:36:05,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:36:05,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:36:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:36:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:36:05,485 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:36:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:36:05,798 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2022-01-31 10:36:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:36:05,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-01-31 10:36:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:36:05,799 INFO L225 Difference]: With dead ends: 176 [2022-01-31 10:36:05,799 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 10:36:05,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-01-31 10:36:05,800 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:36:05,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 275 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:36:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 10:36:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2022-01-31 10:36:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 129 states have (on average 1.1472868217054264) internal successors, (148), 129 states have internal predecessors, (148), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:36:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 174 transitions. [2022-01-31 10:36:05,805 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 174 transitions. Word has length 48 [2022-01-31 10:36:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:36:05,806 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 174 transitions. [2022-01-31 10:36:05,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:36:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 174 transitions. [2022-01-31 10:36:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 10:36:05,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:36:05,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 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 10:36:05,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:36:06,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-31 10:36:06,011 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:36:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:36:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1052219331, now seen corresponding path program 11 times [2022-01-31 10:36:06,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:36:06,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608960503] [2022-01-31 10:36:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:36:06,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:36:06,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:36:06,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605354624] [2022-01-31 10:36:06,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:36:06,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:36:06,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:36:06,026 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:36:06,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:36:06,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 10:36:06,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:36:06,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 95 conjunts are in the unsatisfiable core [2022-01-31 10:36:06,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:36:06,245 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 10 treesize of output 8 [2022-01-31 10:36:06,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:36:06,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-01-31 10:36:06,280 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 12 treesize of output 11 [2022-01-31 10:36:06,284 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 12 treesize of output 11 [2022-01-31 10:36:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-01-31 10:36:06,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-01-31 10:36:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,368 INFO L387 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 18 treesize of output 22 [2022-01-31 10:36:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,376 INFO L387 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 18 treesize of output 22 [2022-01-31 10:36:06,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2022-01-31 10:36:06,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-01-31 10:36:06,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2022-01-31 10:36:06,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2022-01-31 10:36:06,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 69 [2022-01-31 10:36:06,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-31 10:36:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-01-31 10:36:06,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-01-31 10:36:06,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 79 [2022-01-31 10:36:06,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2022-01-31 10:36:06,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 56 [2022-01-31 10:36:06,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:06,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:07,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 56 [2022-01-31 10:36:08,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:08,547 INFO L353 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2022-01-31 10:36:08,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 158 [2022-01-31 10:36:09,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:09,207 INFO L353 Elim1Store]: treesize reduction 130, result has 11.6 percent of original size [2022-01-31 10:36:09,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 27 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 168 [2022-01-31 10:36:11,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 53 [2022-01-31 10:36:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:36:12,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:36:16,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:36:16,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608960503] [2022-01-31 10:36:16,282 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:36:16,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605354624] [2022-01-31 10:36:16,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605354624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:36:16,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:36:16,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-01-31 10:36:16,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902632539] [2022-01-31 10:36:16,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:36:16,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 10:36:16,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:36:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 10:36:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 10:36:16,285 INFO L87 Difference]: Start difference. First operand 156 states and 174 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 29 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:36:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:36:18,846 INFO L93 Difference]: Finished difference Result 189 states and 211 transitions. [2022-01-31 10:36:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 10:36:18,848 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 29 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-01-31 10:36:18,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:36:18,848 INFO L225 Difference]: With dead ends: 189 [2022-01-31 10:36:18,848 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 10:36:18,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=302, Invalid=2454, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 10:36:18,850 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:36:18,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 456 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 838 Invalid, 0 Unknown, 73 Unchecked, 1.3s Time] [2022-01-31 10:36:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 10:36:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2022-01-31 10:36:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 143 states have internal predecessors, (165), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:36:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-01-31 10:36:18,855 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 50 [2022-01-31 10:36:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:36:18,855 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-01-31 10:36:18,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 29 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:36:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-01-31 10:36:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 10:36:18,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:36:18,856 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 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 10:36:18,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:36:19,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 10:36:19,071 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:36:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:36:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash 207747460, now seen corresponding path program 6 times [2022-01-31 10:36:19,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:36:19,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497988137] [2022-01-31 10:36:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:36:19,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:36:19,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:36:19,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290761509] [2022-01-31 10:36:19,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:36:19,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:36:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:36:19,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:36:19,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:36:19,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 10:36:19,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:36:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 99 conjunts are in the unsatisfiable core [2022-01-31 10:36:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:36:19,491 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 10 treesize of output 8 [2022-01-31 10:36:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:19,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-01-31 10:36:19,531 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 8 treesize of output 7 [2022-01-31 10:36:19,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2022-01-31 10:36:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:19,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-01-31 10:36:19,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-01-31 10:36:19,630 INFO L353 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-01-31 10:36:19,631 INFO L387 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-01-31 10:36:19,652 INFO L353 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-01-31 10:36:19,652 INFO L387 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-01-31 10:36:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:19,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 61 [2022-01-31 10:36:19,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-01-31 10:36:19,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:19,856 INFO L353 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2022-01-31 10:36:19,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 43 [2022-01-31 10:36:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:19,881 INFO L353 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2022-01-31 10:36:19,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 43 [2022-01-31 10:36:20,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 81 [2022-01-31 10:36:20,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,162 INFO L353 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-01-31 10:36:20,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 58 [2022-01-31 10:36:20,219 INFO L353 Elim1Store]: treesize reduction 230, result has 14.2 percent of original size [2022-01-31 10:36:20,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 95 treesize of output 118 [2022-01-31 10:36:20,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 101 [2022-01-31 10:36:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,550 INFO L353 Elim1Store]: treesize reduction 58, result has 18.3 percent of original size [2022-01-31 10:36:20,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 73 [2022-01-31 10:36:20,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:20,613 INFO L353 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2022-01-31 10:36:20,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 119 treesize of output 148 [2022-01-31 10:36:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:23,564 INFO L353 Elim1Store]: treesize reduction 195, result has 41.6 percent of original size [2022-01-31 10:36:23,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 124 treesize of output 234 [2022-01-31 10:36:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:36:30,198 INFO L353 Elim1Store]: treesize reduction 283, result has 25.9 percent of original size [2022-01-31 10:36:30,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 17 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 192 treesize of output 272