/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 00:56:09,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 00:56:09,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 00:56:09,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 00:56:09,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 00:56:09,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 00:56:09,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 00:56:09,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 00:56:09,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 00:56:09,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 00:56:09,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 00:56:09,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 00:56:09,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 00:56:09,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 00:56:09,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 00:56:09,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 00:56:09,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 00:56:09,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 00:56:09,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 00:56:09,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 00:56:09,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 00:56:09,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 00:56:09,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 00:56:09,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 00:56:09,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 00:56:09,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 00:56:09,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 00:56:09,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 00:56:09,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 00:56:09,262 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 00:56:09,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 00:56:09,296 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 00:56:09,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 00:56:09,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 00:56:09,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 00:56:09,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 00:56:09,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 00:56:09,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 00:56:09,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 00:56:09,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:56:09,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 00:56:09,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 00:56:09,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 00:56:09,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 00:56:09,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 00:56:09,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 00:56:09,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 00:56:09,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 00:56:09,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 00:56:09,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 00:56:09,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 00:56:09,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 00:56:09,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 00:56:09,546 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 00:56:09,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2.c [2022-01-31 00:56:09,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243e07b6e/f3378a9a942b4c0cb59c483c1927c2b9/FLAG9fb51336f [2022-01-31 00:56:09,991 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 00:56:09,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2.c [2022-01-31 00:56:09,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243e07b6e/f3378a9a942b4c0cb59c483c1927c2b9/FLAG9fb51336f [2022-01-31 00:56:10,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243e07b6e/f3378a9a942b4c0cb59c483c1927c2b9 [2022-01-31 00:56:10,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 00:56:10,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 00:56:10,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 00:56:10,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 00:56:10,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 00:56:10,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33086ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10, skipping insertion in model container [2022-01-31 00:56:10,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 00:56:10,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 00:56:10,154 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2.c[587,600] [2022-01-31 00:56:10,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:56:10,173 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 00:56:10,181 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2.c[587,600] [2022-01-31 00:56:10,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:56:10,195 INFO L208 MainTranslator]: Completed translation [2022-01-31 00:56:10,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10 WrapperNode [2022-01-31 00:56:10,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 00:56:10,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 00:56:10,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 00:56:10,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 00:56:10,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 00:56:10,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 00:56:10,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 00:56:10,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 00:56:10,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (1/1) ... [2022-01-31 00:56:10,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:56:10,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:10,249 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 00:56:10,251 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 00:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 00:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 00:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 00:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 00:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 00:56:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 00:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 00:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 00:56:10,338 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 00:56:10,340 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 00:56:10,467 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 00:56:10,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 00:56:10,472 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 00:56:10,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:56:10 BoogieIcfgContainer [2022-01-31 00:56:10,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 00:56:10,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 00:56:10,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 00:56:10,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 00:56:10,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:56:10" (1/3) ... [2022-01-31 00:56:10,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f6ef93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:56:10, skipping insertion in model container [2022-01-31 00:56:10,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:56:10" (2/3) ... [2022-01-31 00:56:10,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f6ef93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:56:10, skipping insertion in model container [2022-01-31 00:56:10,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:56:10" (3/3) ... [2022-01-31 00:56:10,484 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2.c [2022-01-31 00:56:10,488 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 00:56:10,488 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 00:56:10,539 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 00:56:10,544 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 00:56:10,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 00:56:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 00:56:10,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:10,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:56:10,575 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash 199879945, now seen corresponding path program 1 times [2022-01-31 00:56:10,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:10,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381758579] [2022-01-31 00:56:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:10,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:56:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:56:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:10,786 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 00:56:10,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:10,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381758579] [2022-01-31 00:56:10,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381758579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:56:10,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:56:10,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 00:56:10,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934502367] [2022-01-31 00:56:10,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:56:10,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 00:56:10,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 00:56:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 00:56:10,812 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 00:56:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:10,857 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-01-31 00:56:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 00:56:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 22 [2022-01-31 00:56:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:10,866 INFO L225 Difference]: With dead ends: 58 [2022-01-31 00:56:10,866 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 00:56:10,869 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 00:56:10,874 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:10,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:56:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 00:56:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 00:56:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 00:56:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 00:56:10,899 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2022-01-31 00:56:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:10,899 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 00:56:10,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 00:56:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 00:56:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 00:56:10,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:10,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:56:10,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 00:56:10,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash -386926069, now seen corresponding path program 1 times [2022-01-31 00:56:10,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:10,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55844477] [2022-01-31 00:56:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:10,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:10,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227189617] [2022-01-31 00:56:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:10,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:10,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:10,944 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 00:56:10,945 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 00:56:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 00:56:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:11,127 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 00:56:11,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 00:56:11,139 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 00:56:11,152 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 00:56:11,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 00:56:11,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-31 00:56:11,346 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 00:56:11,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 00:56:11,387 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 00:56:11,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 00:56:11,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:11,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55844477] [2022-01-31 00:56:11,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227189617] [2022-01-31 00:56:11,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227189617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:56:11,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:56:11,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 00:56:11,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521516121] [2022-01-31 00:56:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:56:11,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 00:56:11,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 00:56:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 00:56:11,399 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:11,488 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-01-31 00:56:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 00:56:11,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 00:56:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:11,490 INFO L225 Difference]: With dead ends: 47 [2022-01-31 00:56:11,490 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 00:56:11,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 00:56:11,491 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:11,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:56:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 00:56:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 00:56:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-31 00:56:11,498 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2022-01-31 00:56:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:11,498 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-31 00:56:11,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-31 00:56:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 00:56:11,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:11,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:56:11,520 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 00:56:11,717 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 00:56:11,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1765590153, now seen corresponding path program 1 times [2022-01-31 00:56:11,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:11,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206175607] [2022-01-31 00:56:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:11,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:11,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863975511] [2022-01-31 00:56:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:11,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:11,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:11,757 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 00:56:11,758 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 00:56:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 00:56:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:11,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 00:56:11,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:11,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206175607] [2022-01-31 00:56:11,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863975511] [2022-01-31 00:56:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863975511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:56:11,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:56:11,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 00:56:11,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473344627] [2022-01-31 00:56:11,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:56:11,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 00:56:11,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 00:56:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 00:56:11,857 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:11,906 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-01-31 00:56:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 00:56:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 00:56:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:11,910 INFO L225 Difference]: With dead ends: 71 [2022-01-31 00:56:11,910 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 00:56:11,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 00:56:11,911 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:11,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 68 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:56:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 00:56:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-01-31 00:56:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 00:56:11,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2022-01-31 00:56:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:11,923 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 00:56:11,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 00:56:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 00:56:11,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:11,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:56:11,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 00:56:12,143 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 00:56:12,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1858974921, now seen corresponding path program 1 times [2022-01-31 00:56:12,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690717695] [2022-01-31 00:56:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:12,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:12,162 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:12,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458308209] [2022-01-31 00:56:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:12,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:12,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:12,175 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 00:56:12,191 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 00:56:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:12,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 00:56:12,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:12,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:56:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:12,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690717695] [2022-01-31 00:56:12,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458308209] [2022-01-31 00:56:12,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458308209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:56:12,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:56:12,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-31 00:56:12,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278037993] [2022-01-31 00:56:12,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:56:12,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 00:56:12,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:12,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 00:56:12,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 00:56:12,336 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:12,447 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-01-31 00:56:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 00:56:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 00:56:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:12,453 INFO L225 Difference]: With dead ends: 66 [2022-01-31 00:56:12,454 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 00:56:12,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-31 00:56:12,465 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:12,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:56:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 00:56:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-01-31 00:56:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 00:56:12,475 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-01-31 00:56:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:12,475 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 00:56:12,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 00:56:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 00:56:12,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:12,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:56:12,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 00:56:12,688 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 00:56:12,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -292108345, now seen corresponding path program 1 times [2022-01-31 00:56:12,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900275685] [2022-01-31 00:56:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:12,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:12,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:12,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442977195] [2022-01-31 00:56:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:12,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:12,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:12,724 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 00:56:12,725 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 00:56:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 00:56:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:12,831 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 00:56:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:12,835 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 14 treesize of output 14 [2022-01-31 00:56:12,837 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 00:56:12,848 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 14 treesize of output 16 [2022-01-31 00:56:12,875 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 00:56:12,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 00:56:12,902 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 00:56:12,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 00:56:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:12,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:56:13,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_126 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_126) c_main_~b~0.base) c_main_~b~0.offset) 1)) is different from false [2022-01-31 00:56:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-31 00:56:13,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:13,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900275685] [2022-01-31 00:56:13,134 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:13,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442977195] [2022-01-31 00:56:13,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442977195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:56:13,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:56:13,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-01-31 00:56:13,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968272901] [2022-01-31 00:56:13,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:56:13,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 00:56:13,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 00:56:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=105, Unknown=1, NotChecked=20, Total=156 [2022-01-31 00:56:13,136 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:13,279 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 00:56:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 00:56:13,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 00:56:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:13,281 INFO L225 Difference]: With dead ends: 57 [2022-01-31 00:56:13,281 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 00:56:13,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=188, Unknown=1, NotChecked=28, Total=272 [2022-01-31 00:56:13,282 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:13,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-01-31 00:56:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 00:56:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-01-31 00:56:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-31 00:56:13,286 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 26 [2022-01-31 00:56:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:13,287 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-31 00:56:13,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-31 00:56:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 00:56:13,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:13,287 INFO L514 BasicCegarLoop]: trace histogram [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 00:56:13,302 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 00:56:13,492 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 00:56:13,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1603857595, now seen corresponding path program 2 times [2022-01-31 00:56:13,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521552000] [2022-01-31 00:56:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:13,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:13,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444370113] [2022-01-31 00:56:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:56:13,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:13,538 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 00:56:13,539 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 00:56:13,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:56:13,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:56:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 00:56:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:56:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:13,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521552000] [2022-01-31 00:56:13,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:13,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444370113] [2022-01-31 00:56:13,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444370113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:56:13,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:56:13,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 00:56:13,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357392447] [2022-01-31 00:56:13,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:56:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 00:56:13,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 00:56:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 00:56:13,717 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:13,869 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-01-31 00:56:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 00:56:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 00:56:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:13,870 INFO L225 Difference]: With dead ends: 88 [2022-01-31 00:56:13,870 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 00:56:13,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-31 00:56:13,871 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:13,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 139 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:56:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 00:56:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2022-01-31 00:56:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-01-31 00:56:13,877 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2022-01-31 00:56:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:13,877 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-01-31 00:56:13,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-01-31 00:56:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 00:56:13,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:13,878 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 00:56:13,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 00:56:14,078 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 00:56:14,078 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 376522627, now seen corresponding path program 3 times [2022-01-31 00:56:14,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:14,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933615251] [2022-01-31 00:56:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:14,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:14,115 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995088617] [2022-01-31 00:56:14,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:56:14,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:14,121 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 00:56:14,121 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 00:56:14,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 00:56:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:56:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 00:56:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:14,339 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 00:56:14,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 00:56:14,344 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 00:56:14,350 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 00:56:14,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 11 [2022-01-31 00:56:14,378 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 5 treesize of output 3 [2022-01-31 00:56:14,394 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 00:56:14,424 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 14 treesize of output 16 [2022-01-31 00:56:14,495 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 14 treesize of output 16 [2022-01-31 00:56:14,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 00:56:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:56:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 37 treesize of output 24 [2022-01-31 00:56:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,589 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 21 treesize of output 20 [2022-01-31 00:56:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:14,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:56:14,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 00:56:14,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2022-01-31 00:56:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:14,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:56:14,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_208 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_208) c_main_~b~0.base) c_main_~b~0.offset) 1)) is different from false [2022-01-31 00:56:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-01-31 00:56:14,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933615251] [2022-01-31 00:56:14,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995088617] [2022-01-31 00:56:14,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995088617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:56:14,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:56:14,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-31 00:56:14,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618770478] [2022-01-31 00:56:14,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:56:14,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 00:56:14,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 00:56:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=212, Unknown=1, NotChecked=30, Total=306 [2022-01-31 00:56:14,939 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:15,184 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-01-31 00:56:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 00:56:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 00:56:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:15,185 INFO L225 Difference]: With dead ends: 83 [2022-01-31 00:56:15,185 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 00:56:15,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=481, Unknown=2, NotChecked=46, Total=650 [2022-01-31 00:56:15,186 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:15,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 239 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-01-31 00:56:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 00:56:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-01-31 00:56:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:56:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-01-31 00:56:15,192 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 30 [2022-01-31 00:56:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:15,192 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-01-31 00:56:15,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-01-31 00:56:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 00:56:15,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:15,193 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 00:56:15,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 00:56:15,399 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 00:56:15,399 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2143768931, now seen corresponding path program 1 times [2022-01-31 00:56:15,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262519884] [2022-01-31 00:56:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:15,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:15,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:15,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516577198] [2022-01-31 00:56:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:15,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:15,423 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 00:56:15,433 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 00:56:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:56:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 00:56:15,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:15,548 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 00:56:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:56:15,553 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 00:56:15,555 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 00:56:15,557 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 00:56:15,581 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 00:56:15,581 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 28 treesize of output 30 [2022-01-31 00:56:15,617 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-31 00:56:15,617 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 38 treesize of output 32 [2022-01-31 00:56:15,931 INFO L353 Elim1Store]: treesize reduction 91, result has 3.2 percent of original size [2022-01-31 00:56:15,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 75 treesize of output 35 [2022-01-31 00:56:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:15,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:56:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:56:16,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262519884] [2022-01-31 00:56:16,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516577198] [2022-01-31 00:56:16,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516577198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:56:16,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:56:16,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-01-31 00:56:16,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375284558] [2022-01-31 00:56:16,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:56:16,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 00:56:16,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 00:56:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-31 00:56:16,458 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:56:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:18,701 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-01-31 00:56:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 00:56:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-01-31 00:56:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:18,702 INFO L225 Difference]: With dead ends: 70 [2022-01-31 00:56:18,702 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 00:56:18,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2022-01-31 00:56:18,703 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:18,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 250 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-31 00:56:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 00:56:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-31 00:56:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 00:56:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-01-31 00:56:18,710 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 34 [2022-01-31 00:56:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:18,710 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-01-31 00:56:18,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:56:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-01-31 00:56:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 00:56:18,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:18,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 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 00:56:18,731 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 00:56:18,929 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 00:56:18,929 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -768689921, now seen corresponding path program 4 times [2022-01-31 00:56:18,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:18,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482761516] [2022-01-31 00:56:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:18,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:18,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:18,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432494394] [2022-01-31 00:56:18,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 00:56:18,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:18,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:18,961 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 00:56:18,961 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 00:56:19,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 00:56:19,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:56:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 00:56:19,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:56:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 00:56:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:56:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 00:56:19,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:56:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482761516] [2022-01-31 00:56:19,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:56:19,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432494394] [2022-01-31 00:56:19,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432494394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:56:19,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:56:19,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 00:56:19,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675880039] [2022-01-31 00:56:19,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:56:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 00:56:19,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:56:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 00:56:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 00:56:19,173 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:56:19,428 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2022-01-31 00:56:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 00:56:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 00:56:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:56:19,429 INFO L225 Difference]: With dead ends: 130 [2022-01-31 00:56:19,429 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 00:56:19,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-01-31 00:56:19,430 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:56:19,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 165 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:56:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 00:56:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2022-01-31 00:56:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 00:56:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-01-31 00:56:19,436 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 34 [2022-01-31 00:56:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:56:19,436 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-01-31 00:56:19,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:56:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-01-31 00:56:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 00:56:19,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:56:19,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 00:56:19,456 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 00:56:19,639 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 00:56:19,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:56:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:56:19,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2094692671, now seen corresponding path program 5 times [2022-01-31 00:56:19,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:56:19,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468443937] [2022-01-31 00:56:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:56:19,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:56:19,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:56:19,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957784320] [2022-01-31 00:56:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 00:56:19,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:56:19,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:56:19,670 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 00:56:19,671 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 00:57:13,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 00:57:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:57:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 00:57:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:57:13,585 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 00:57:13,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,591 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 14 treesize of output 14 [2022-01-31 00:57:13,595 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 00:57:13,622 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 14 treesize of output 16 [2022-01-31 00:57:13,654 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 14 treesize of output 16 [2022-01-31 00:57:13,680 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 14 treesize of output 16 [2022-01-31 00:57:13,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 00:57:13,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:57:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 26 treesize of output 15 [2022-01-31 00:57:13,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 00:57:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:57:13,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 00:57:13,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 17 [2022-01-31 00:57:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,862 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 21 treesize of output 20 [2022-01-31 00:57:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:57:13,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 00:57:13,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2022-01-31 00:57:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:57:13,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:57:14,565 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_355 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_355) c_main_~b~0.base) c_main_~b~0.offset) 1)) is different from false [2022-01-31 00:57:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2022-01-31 00:57:14,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:57:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468443937] [2022-01-31 00:57:14,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:57:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957784320] [2022-01-31 00:57:14,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957784320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:57:14,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:57:14,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-01-31 00:57:14,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256748496] [2022-01-31 00:57:14,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:57:14,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 00:57:14,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:57:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 00:57:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=322, Unknown=1, NotChecked=38, Total=462 [2022-01-31 00:57:14,605 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 22 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:57:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:57:15,032 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-01-31 00:57:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 00:57:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 00:57:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:57:15,033 INFO L225 Difference]: With dead ends: 98 [2022-01-31 00:57:15,034 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 00:57:15,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=597, Unknown=1, NotChecked=52, Total=812 [2022-01-31 00:57:15,035 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 00:57:15,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 270 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 275 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-01-31 00:57:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 00:57:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 72. [2022-01-31 00:57:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 00:57:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-01-31 00:57:15,042 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 34 [2022-01-31 00:57:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:57:15,042 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-01-31 00:57:15,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:57:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-01-31 00:57:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 00:57:15,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:57:15,043 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 00:57:15,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 00:57:15,247 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 00:57:15,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:57:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:57:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1519271003, now seen corresponding path program 2 times [2022-01-31 00:57:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:57:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642903363] [2022-01-31 00:57:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:57:15,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:57:15,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:57:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62611064] [2022-01-31 00:57:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:57:15,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:57:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:57:15,261 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 00:57:15,264 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 00:57:15,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:57:15,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:57:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 00:57:15,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:57:15,396 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 00:57:15,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:57:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 00:57:15,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:57:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642903363] [2022-01-31 00:57:15,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:57:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62611064] [2022-01-31 00:57:15,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62611064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:57:15,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:57:15,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 00:57:15,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067812325] [2022-01-31 00:57:15,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:57:15,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 00:57:15,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:57:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 00:57:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 00:57:15,467 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 00:57:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:57:15,593 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-01-31 00:57:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 00:57:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 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 00:57:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:57:15,595 INFO L225 Difference]: With dead ends: 90 [2022-01-31 00:57:15,596 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 00:57:15,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 00:57:15,596 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:57:15,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 85 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:57:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 00:57:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-01-31 00:57:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:57:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 00:57:15,605 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 36 [2022-01-31 00:57:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:57:15,606 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 00:57:15,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 00:57:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 00:57:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 00:57:15,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:57:15,606 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 00:57:15,629 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 00:57:15,827 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 00:57:15,827 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:57:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:57:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 56996441, now seen corresponding path program 3 times [2022-01-31 00:57:15,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:57:15,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591192728] [2022-01-31 00:57:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:57:15,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:57:15,882 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 00:57:15,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277847859] [2022-01-31 00:57:15,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:57:15,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:57:15,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:57:15,884 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 00:57:15,885 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 00:57:16,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 00:57:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:57:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 00:57:16,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:57:16,107 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 00:57:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,113 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 19 treesize of output 23 [2022-01-31 00:57:16,119 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 00:57:16,123 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 00:57:16,191 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:57:16,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2022-01-31 00:57:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 00:57:16,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 26 treesize of output 15 [2022-01-31 00:57:16,271 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:57:16,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2022-01-31 00:57:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 143 [2022-01-31 00:57:16,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 76 [2022-01-31 00:57:16,509 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 00:57:16,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 143 [2022-01-31 00:57:16,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:57:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-01-31 00:57:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 124 treesize of output 65 [2022-01-31 00:57:16,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:57:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:16,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:57:16,725 INFO L353 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2022-01-31 00:57:16,726 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 5 new quantified variables, introduced 11 case distinctions, treesize of input 72 treesize of output 65 [2022-01-31 00:57:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:23,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:23,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:57:23,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:57:23,196 INFO L353 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2022-01-31 00:57:23,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 54 [2022-01-31 00:57:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:57:23,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:57:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:57:34,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:57:34,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591192728] [2022-01-31 00:57:34,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 00:57:34,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277847859] [2022-01-31 00:57:34,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277847859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:57:34,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 00:57:34,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2022-01-31 00:57:34,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365230860] [2022-01-31 00:57:34,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 00:57:34,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 00:57:34,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:57:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 00:57:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=709, Unknown=7, NotChecked=0, Total=870 [2022-01-31 00:57:34,728 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 00:58:40,354 WARN L228 SmtUtils]: Spent 44.86s on a formula simplification. DAG size of input: 201 DAG size of output: 200 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:01:06,690 WARN L228 SmtUtils]: Spent 2.29m on a formula simplification. DAG size of input: 242 DAG size of output: 232 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:01:13,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 01:01:32,217 WARN L228 SmtUtils]: Spent 14.20s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:03:33,288 WARN L228 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 223 DAG size of output: 194 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:04:22,999 WARN L228 SmtUtils]: Spent 40.37s on a formula simplification. DAG size of input: 196 DAG size of output: 183 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:04:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:04:23,273 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-01-31 01:04:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 01:04:23,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-01-31 01:04:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:04:23,275 INFO L225 Difference]: With dead ends: 95 [2022-01-31 01:04:23,275 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 01:04:23,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 417.1s TimeCoverageRelationStatistics Valid=341, Invalid=1540, Unknown=11, NotChecked=0, Total=1892 [2022-01-31 01:04:23,276 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:04:23,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 315 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 250 Invalid, 0 Unknown, 54 Unchecked, 7.2s Time] [2022-01-31 01:04:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 01:04:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2022-01-31 01:04:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 72 states have internal predecessors, (81), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 01:04:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-01-31 01:04:23,286 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 38 [2022-01-31 01:04:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:04:23,288 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-01-31 01:04:23,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:04:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-01-31 01:04:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 01:04:23,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:04:23,289 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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 01:04:23,306 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 01:04:23,489 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 01:04:23,490 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:04:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:04:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 467372857, now seen corresponding path program 6 times [2022-01-31 01:04:23,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:04:23,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059960249] [2022-01-31 01:04:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:04:23,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:04:23,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:04:23,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16292100] [2022-01-31 01:04:23,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 01:04:23,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:04:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:04:23,516 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 01:04:23,517 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 01:04:24,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 01:04:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:04:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 01:04:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:04:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 01:04:24,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:04:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 01:04:24,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:04:24,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059960249] [2022-01-31 01:04:24,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:04:24,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16292100] [2022-01-31 01:04:24,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16292100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:04:24,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:04:24,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 01:04:24,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530777857] [2022-01-31 01:04:24,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:04:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 01:04:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:04:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 01:04:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 01:04:24,482 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:04:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:04:24,919 INFO L93 Difference]: Finished difference Result 172 states and 197 transitions. [2022-01-31 01:04:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 01:04:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-01-31 01:04:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:04:24,929 INFO L225 Difference]: With dead ends: 172 [2022-01-31 01:04:24,929 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 01:04:24,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2022-01-31 01:04:24,930 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:04:24,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 159 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 01:04:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 01:04:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2022-01-31 01:04:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 97 states have (on average 1.134020618556701) internal successors, (110), 101 states have internal predecessors, (110), 13 states have call successors, (13), 9 states have call predecessors, (13), 7 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 01:04:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-01-31 01:04:24,969 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 40 [2022-01-31 01:04:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:04:24,969 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-01-31 01:04:24,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:04:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-01-31 01:04:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 01:04:24,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:04:24,971 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 01:04:24,982 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 01:04:25,176 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 01:04:25,177 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:04:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:04:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash -330340331, now seen corresponding path program 4 times [2022-01-31 01:04:25,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:04:25,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460380623] [2022-01-31 01:04:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:04:25,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:04:25,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:04:25,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487824586] [2022-01-31 01:04:25,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 01:04:25,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:04:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:04:25,195 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 01:04:25,195 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 01:04:25,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 01:04:25,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:04:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 01:04:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:04:25,619 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 01:04:25,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,625 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 01:04:25,630 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 20 treesize of output 20 [2022-01-31 01:04:25,634 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 01:04:25,638 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 01:04:25,681 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:04:25,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2022-01-31 01:04:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:04:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 17 [2022-01-31 01:04:25,748 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:04:25,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2022-01-31 01:04:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:04:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 26 treesize of output 15 [2022-01-31 01:04:25,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,802 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 01:04:25,802 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 28 treesize of output 30 [2022-01-31 01:04:25,865 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:04:25,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2022-01-31 01:04:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:04:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 155 [2022-01-31 01:04:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:25,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 103 treesize of output 64 [2022-01-31 01:04:26,005 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:04:26,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 101 [2022-01-31 01:04:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 118 [2022-01-31 01:04:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 121 treesize of output 62 [2022-01-31 01:04:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,133 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 01:04:26,133 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 3 case distinctions, treesize of input 47 treesize of output 44 [2022-01-31 01:04:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:04:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:26,363 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-31 01:04:26,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 39 [2022-01-31 01:04:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:04:26,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:04:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:04:50,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:04:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460380623] [2022-01-31 01:04:50,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:04:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487824586] [2022-01-31 01:04:50,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487824586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:04:50,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:04:50,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2022-01-31 01:04:50,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995911049] [2022-01-31 01:04:50,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:04:50,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 01:04:50,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:04:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 01:04:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=733, Unknown=7, NotChecked=0, Total=870 [2022-01-31 01:04:50,074 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:04:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:04:51,608 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2022-01-31 01:04:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 01:04:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-01-31 01:04:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:04:51,609 INFO L225 Difference]: With dead ends: 168 [2022-01-31 01:04:51,610 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 01:04:51,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=178, Invalid=1074, Unknown=8, NotChecked=0, Total=1260 [2022-01-31 01:04:51,610 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:04:51,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 318 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-01-31 01:04:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 01:04:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 139. [2022-01-31 01:04:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 120 states have internal predecessors, (128), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 01:04:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 160 transitions. [2022-01-31 01:04:51,631 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 160 transitions. Word has length 42 [2022-01-31 01:04:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:04:51,631 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 160 transitions. [2022-01-31 01:04:51,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:04:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 160 transitions. [2022-01-31 01:04:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 01:04:51,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:04:51,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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 01:04:51,649 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 01:04:51,832 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 01:04:51,832 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:04:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:04:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 871584375, now seen corresponding path program 7 times [2022-01-31 01:04:51,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:04:51,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29503833] [2022-01-31 01:04:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:04:51,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:04:51,845 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:04:51,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858925482] [2022-01-31 01:04:51,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 01:04:51,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:04:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:04:51,847 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 01:04:51,848 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 01:04:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:04:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 01:04:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:04:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 01:04:52,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:04:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 01:04:52,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:04:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29503833] [2022-01-31 01:04:52,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:04:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858925482] [2022-01-31 01:04:52,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858925482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:04:52,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:04:52,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-31 01:04:52,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156758239] [2022-01-31 01:04:52,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:04:52,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 01:04:52,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:04:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 01:04:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-31 01:04:52,158 INFO L87 Difference]: Start difference. First operand 139 states and 160 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:04:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:04:52,899 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2022-01-31 01:04:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 01:04:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-01-31 01:04:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:04:52,903 INFO L225 Difference]: With dead ends: 241 [2022-01-31 01:04:52,903 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 01:04:52,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1483, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 01:04:52,905 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 169 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 01:04:52,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 222 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 01:04:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 01:04:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2022-01-31 01:04:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 130 states have internal predecessors, (140), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 01:04:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2022-01-31 01:04:52,946 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 42 [2022-01-31 01:04:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:04:52,946 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2022-01-31 01:04:52,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:04:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2022-01-31 01:04:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 01:04:52,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:04:52,947 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] [2022-01-31 01:04:52,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 01:04:53,147 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 01:04:53,148 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:04:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:04:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 59041583, now seen corresponding path program 5 times [2022-01-31 01:04:53,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:04:53,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66287460] [2022-01-31 01:04:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:04:53,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:04:53,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:04:53,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851311537] [2022-01-31 01:04:53,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 01:04:53,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:04:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:04:53,158 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 01:04:53,159 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 01:04:56,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-31 01:04:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:04:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 01:04:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:04:56,301 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 01:04:56,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 01:04:56,327 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-01-31 01:04:56,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-01-31 01:04:56,335 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 01:04:56,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-01-31 01:04:56,404 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 01:04:56,424 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-01-31 01:04:56,443 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 5 treesize of output 3 [2022-01-31 01:04:56,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 33 treesize of output 25 [2022-01-31 01:04:56,469 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 15 treesize of output 11 [2022-01-31 01:04:56,513 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 01:04:56,558 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 117 treesize of output 109 [2022-01-31 01:04:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:04:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 133 [2022-01-31 01:04:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 134 treesize of output 93 [2022-01-31 01:04:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 46 [2022-01-31 01:04:56,795 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 178 treesize of output 158 [2022-01-31 01:04:56,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:04:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-01-31 01:04:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 69 treesize of output 39 [2022-01-31 01:04:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:04:56,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 72 [2022-01-31 01:05:06,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:05:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:05:06,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:05:06,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:05:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:05:06,112 INFO L353 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2022-01-31 01:05:06,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 54 [2022-01-31 01:05:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:05:06,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:05:39,208 WARN L228 SmtUtils]: Spent 10.28s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:05:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:05:39,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:05:39,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66287460] [2022-01-31 01:05:39,233 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:05:39,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851311537] [2022-01-31 01:05:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851311537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:05:39,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:05:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2022-01-31 01:05:39,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736960715] [2022-01-31 01:05:39,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:05:39,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 01:05:39,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:05:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 01:05:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1234, Unknown=8, NotChecked=0, Total=1406 [2022-01-31 01:05:39,235 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 38 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 36 states have internal predecessors, (62), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 01:05:57,982 WARN L228 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 322 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:09:30,615 WARN L228 SmtUtils]: Spent 3.30m on a formula simplification. DAG size of input: 319 DAG size of output: 302 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:09:31,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 01:09:32,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 01:09:34,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 01:09:37,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 01:09:53,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 01:10:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:10:07,879 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2022-01-31 01:10:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 01:10:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 36 states have internal predecessors, (62), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-01-31 01:10:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:10:07,880 INFO L225 Difference]: With dead ends: 176 [2022-01-31 01:10:07,880 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 01:10:07,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 285.5s TimeCoverageRelationStatistics Valid=311, Invalid=2434, Unknown=11, NotChecked=0, Total=2756 [2022-01-31 01:10:07,881 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-01-31 01:10:07,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 497 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 300 Invalid, 1 Unknown, 153 Unchecked, 18.4s Time] [2022-01-31 01:10:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 01:10:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-01-31 01:10:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 115 states have internal predecessors, (124), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 01:10:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2022-01-31 01:10:07,901 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 46 [2022-01-31 01:10:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:10:07,901 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2022-01-31 01:10:07,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 36 states have internal predecessors, (62), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 01:10:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2022-01-31 01:10:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 01:10:07,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:10:07,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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 01:10:07,908 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 01:10:08,108 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 01:10:08,108 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:10:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:10:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1523170763, now seen corresponding path program 8 times [2022-01-31 01:10:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:10:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264524508] [2022-01-31 01:10:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:10:08,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:10:08,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:10:08,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409143505] [2022-01-31 01:10:08,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 01:10:08,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:10:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:10:08,123 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 01:10:08,127 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 01:10:08,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 01:10:08,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:10:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 01:10:08,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:10:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:10:08,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:10:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:10:08,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:10:08,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264524508] [2022-01-31 01:10:08,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:10:08,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409143505] [2022-01-31 01:10:08,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409143505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:10:08,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:10:08,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-01-31 01:10:08,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974213419] [2022-01-31 01:10:08,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:10:08,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 01:10:08,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:10:08,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 01:10:08,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-01-31 01:10:08,492 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:10:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:10:09,705 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-01-31 01:10:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 01:10:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-01-31 01:10:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:10:09,707 INFO L225 Difference]: With dead ends: 233 [2022-01-31 01:10:09,707 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 01:10:09,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=802, Invalid=2620, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 01:10:09,709 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 261 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 01:10:09,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 191 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 01:10:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 01:10:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 164. [2022-01-31 01:10:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 140 states have internal predecessors, (150), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 01:10:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2022-01-31 01:10:09,734 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 44 [2022-01-31 01:10:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:10:09,734 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2022-01-31 01:10:09,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:10:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2022-01-31 01:10:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 01:10:09,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:10:09,735 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 01:10:09,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 01:10:09,942 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 01:10:09,942 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:10:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:10:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1439748049, now seen corresponding path program 6 times [2022-01-31 01:10:09,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:10:09,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558743008] [2022-01-31 01:10:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:10:09,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:10:09,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:10:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190611188] [2022-01-31 01:10:09,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 01:10:09,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:10:09,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:10:09,959 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 01:10:09,961 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 01:10:11,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 01:10:11,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:10:11,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-31 01:10:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:10:11,233 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 01:10:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,246 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 01:10:11,249 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 20 treesize of output 20 [2022-01-31 01:10:11,254 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 01:10:11,259 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 01:10:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,325 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 01:10:11,325 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 28 treesize of output 30 [2022-01-31 01:10:11,398 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-01-31 01:10:11,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 64 [2022-01-31 01:10:11,432 INFO L353 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-01-31 01:10:11,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 69 [2022-01-31 01:10:11,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 36 treesize of output 26 [2022-01-31 01:10:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 45 treesize of output 32 [2022-01-31 01:10:11,625 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 74 treesize of output 70 [2022-01-31 01:10:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,650 INFO L353 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-01-31 01:10:11,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 79 [2022-01-31 01:10:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 36 treesize of output 26 [2022-01-31 01:10:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 45 treesize of output 32 [2022-01-31 01:10:11,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 40 treesize of output 29 [2022-01-31 01:10:11,953 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 83 treesize of output 79 [2022-01-31 01:10:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,974 INFO L353 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-01-31 01:10:11,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 88 [2022-01-31 01:10:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:11,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 18 [2022-01-31 01:10:12,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:10:12,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 17 [2022-01-31 01:10:12,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 37 treesize of output 24 [2022-01-31 01:10:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 32 treesize of output 21 [2022-01-31 01:10:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 32 treesize of output 21 [2022-01-31 01:10:12,730 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 173 treesize of output 161 [2022-01-31 01:10:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:12,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 155 [2022-01-31 01:10:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 122 treesize of output 63 [2022-01-31 01:10:13,382 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 133 treesize of output 125 [2022-01-31 01:10:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 118 [2022-01-31 01:10:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 80 treesize of output 41 [2022-01-31 01:10:13,755 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 113 treesize of output 105 [2022-01-31 01:10:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 84 [2022-01-31 01:10:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:13,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 37 treesize of output 22 [2022-01-31 01:10:14,040 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:10:14,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 71 [2022-01-31 01:10:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 84 [2022-01-31 01:10:14,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:10:14,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 63 treesize of output 42 [2022-01-31 01:10:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:14,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:14,683 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-31 01:10:14,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 39 [2022-01-31 01:10:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:10:14,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:10:25,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:25,480 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 01:10:25,480 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 3 case distinctions, treesize of input 203 treesize of output 1 [2022-01-31 01:10:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:10:25,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:10:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558743008] [2022-01-31 01:10:25,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:10:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190611188] [2022-01-31 01:10:25,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190611188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:10:25,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:10:25,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 53 [2022-01-31 01:10:25,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811260666] [2022-01-31 01:10:25,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:10:25,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 01:10:25,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:10:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 01:10:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=2332, Unknown=2, NotChecked=0, Total=2756 [2022-01-31 01:10:25,513 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 53 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 01:10:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:10:29,118 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2022-01-31 01:10:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 01:10:29,119 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-01-31 01:10:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:10:29,120 INFO L225 Difference]: With dead ends: 202 [2022-01-31 01:10:29,120 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 01:10:29,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=706, Invalid=4122, Unknown=2, NotChecked=0, Total=4830 [2022-01-31 01:10:29,122 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 01:10:29,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 395 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 218 Invalid, 0 Unknown, 580 Unchecked, 0.6s Time] [2022-01-31 01:10:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 01:10:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2022-01-31 01:10:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 153 states have internal predecessors, (162), 24 states have call successors, (24), 12 states have call predecessors, (24), 9 states have return successors, (21), 14 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 01:10:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-01-31 01:10:29,155 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 46 [2022-01-31 01:10:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:10:29,155 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-01-31 01:10:29,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 01:10:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-01-31 01:10:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 01:10:29,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:10:29,156 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 01:10:29,175 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 01:10:29,368 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 01:10:29,369 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:10:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:10:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash 776134737, now seen corresponding path program 7 times [2022-01-31 01:10:29,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:10:29,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204333018] [2022-01-31 01:10:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:10:29,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:10:29,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:10:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460433660] [2022-01-31 01:10:29,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 01:10:29,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:10:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:10:29,389 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 01:10:29,394 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 01:10:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:10:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 01:10:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:10:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 01:10:29,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:10:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 01:10:29,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:10:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204333018] [2022-01-31 01:10:29,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:10:29,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460433660] [2022-01-31 01:10:29,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460433660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:10:29,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:10:29,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-01-31 01:10:29,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569296921] [2022-01-31 01:10:29,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:10:29,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 01:10:29,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:10:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 01:10:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-01-31 01:10:29,707 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 01:10:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:10:30,755 INFO L93 Difference]: Finished difference Result 280 states and 319 transitions. [2022-01-31 01:10:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 01:10:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-01-31 01:10:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:10:30,758 INFO L225 Difference]: With dead ends: 280 [2022-01-31 01:10:30,758 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 01:10:30,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 01:10:30,759 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 130 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 01:10:30,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 208 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 01:10:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 01:10:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 165. [2022-01-31 01:10:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 138 states have internal predecessors, (147), 20 states have call successors, (20), 11 states have call predecessors, (20), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 01:10:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2022-01-31 01:10:30,790 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 46 [2022-01-31 01:10:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:10:30,790 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2022-01-31 01:10:30,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 01:10:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2022-01-31 01:10:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 01:10:30,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:10:30,791 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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 01:10:30,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 01:10:30,991 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 01:10:30,992 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:10:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:10:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash -780387725, now seen corresponding path program 9 times [2022-01-31 01:10:30,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:10:30,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346482965] [2022-01-31 01:10:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:10:30,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:10:31,006 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:10:31,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657102032] [2022-01-31 01:10:31,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 01:10:31,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:10:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:10:31,008 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 01:10:31,010 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 01:10:34,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 01:10:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:10:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 01:10:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:10:34,606 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-31 01:10:34,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-31 01:10:34,611 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 01:10:34,615 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 01:10:34,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 01:10:34,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 11 [2022-01-31 01:10:34,667 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 5 treesize of output 3 [2022-01-31 01:10:34,680 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 01:10:34,719 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 14 treesize of output 16 [2022-01-31 01:10:34,772 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 14 treesize of output 16 [2022-01-31 01:10:34,824 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 14 treesize of output 16 [2022-01-31 01:10:34,858 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 14 treesize of output 16 [2022-01-31 01:10:34,893 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 14 treesize of output 16 [2022-01-31 01:10:34,921 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 14 treesize of output 16 [2022-01-31 01:10:35,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:10:35,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:10:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 17 [2022-01-31 01:10:35,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:10:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:10:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 37 treesize of output 24 [2022-01-31 01:10:35,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:10:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:10:35,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:10:35,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 37 treesize of output 24 [2022-01-31 01:10:35,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:10:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:10:35,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 17 [2022-01-31 01:10:35,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:10:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:10:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 37 treesize of output 24 [2022-01-31 01:10:35,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:10:35,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:10:35,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 26 treesize of output 15 [2022-01-31 01:10:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:35,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:35,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:10:35,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2022-01-31 01:10:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 01:10:35,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:10:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 01:10:38,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:10:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346482965] [2022-01-31 01:10:38,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:10:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657102032] [2022-01-31 01:10:38,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657102032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:10:38,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:10:38,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 44 [2022-01-31 01:10:38,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983147942] [2022-01-31 01:10:38,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:10:38,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 01:10:38,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:10:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 01:10:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 01:10:38,055 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 01:10:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:10:41,167 INFO L93 Difference]: Finished difference Result 219 states and 247 transitions. [2022-01-31 01:10:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 01:10:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 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 01:10:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:10:41,169 INFO L225 Difference]: With dead ends: 219 [2022-01-31 01:10:41,169 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 01:10:41,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1252, Invalid=4754, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 01:10:41,171 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 01:10:41,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 303 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 526 Invalid, 0 Unknown, 491 Unchecked, 0.8s Time] [2022-01-31 01:10:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 01:10:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 186. [2022-01-31 01:10:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 158 states have internal predecessors, (173), 21 states have call successors, (21), 12 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 01:10:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2022-01-31 01:10:41,202 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 46 [2022-01-31 01:10:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:10:41,202 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2022-01-31 01:10:41,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 01:10:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2022-01-31 01:10:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 01:10:41,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:10:41,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-31 01:10:41,210 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 01:10:41,408 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 01:10:41,409 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:10:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:10:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash 942350571, now seen corresponding path program 8 times [2022-01-31 01:10:41,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:10:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835585845] [2022-01-31 01:10:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:10:41,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:10:41,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:10:41,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754702376] [2022-01-31 01:10:41,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 01:10:41,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:10:41,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:10:41,421 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 01:10:41,422 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 01:10:41,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 01:10:41,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:10:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 01:10:41,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:10:41,901 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 01:10:41,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 01:10:41,924 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-01-31 01:10:41,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-01-31 01:10:41,928 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 01:10:41,941 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 17 treesize of output 15 [2022-01-31 01:10:41,957 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 01:10:41,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-31 01:10:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:41,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 11 [2022-01-31 01:10:41,987 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 5 treesize of output 3 [2022-01-31 01:10:42,015 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 01:10:42,070 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:10:42,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2022-01-31 01:10:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 133 [2022-01-31 01:10:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 113 treesize of output 63 [2022-01-31 01:10:42,188 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:10:42,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 124 [2022-01-31 01:10:42,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 150 [2022-01-31 01:10:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 45 [2022-01-31 01:10:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,336 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 01:10:42,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 69 treesize of output 63 [2022-01-31 01:10:42,484 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:10:42,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 195 treesize of output 171 [2022-01-31 01:10:42,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:42,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-01-31 01:10:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 69 treesize of output 39 [2022-01-31 01:10:42,702 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:10:42,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 227 treesize of output 197 [2022-01-31 01:10:42,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 196 [2022-01-31 01:10:42,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:10:42,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:10:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 93 [2022-01-31 01:10:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:42,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:10:42,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:10:42,985 INFO L353 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-01-31 01:10:42,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 112 treesize of output 97