/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-fpi/s22if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:36:19,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:36:19,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:36:19,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:36:19,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:36:19,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:36:19,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:36:19,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:36:19,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:36:19,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:36:19,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:36:19,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:36:19,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:36:19,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:36:19,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:36:19,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:36:19,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:36:19,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:36:19,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:36:19,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:36:19,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:36:19,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:36:19,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:36:19,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:36:19,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:36:19,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:36:19,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:36:19,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:36:19,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:36:19,567 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:36:19,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:36:19,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:36:19,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:36:19,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:36:19,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:36:19,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:36:19,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:36:19,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:36:19,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:36:19,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:36:19,570 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:36:19,570 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:36:19,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:36:19,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:36:19,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:36:19,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:36:19,772 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:36:19,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s22if.c [2022-01-31 11:36:19,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7ba39dd/e93dfd552c1a4e389b376ae9fb784a61/FLAG5e8303c91 [2022-01-31 11:36:20,202 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:36:20,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s22if.c [2022-01-31 11:36:20,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7ba39dd/e93dfd552c1a4e389b376ae9fb784a61/FLAG5e8303c91 [2022-01-31 11:36:20,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7ba39dd/e93dfd552c1a4e389b376ae9fb784a61 [2022-01-31 11:36:20,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:36:20,220 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:36:20,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:36:20,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:36:20,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:36:20,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c82bf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20, skipping insertion in model container [2022-01-31 11:36:20,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:36:20,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:36:20,349 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/s22if.c[588,601] [2022-01-31 11:36:20,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:36:20,366 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:36:20,374 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/s22if.c[588,601] [2022-01-31 11:36:20,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:36:20,387 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:36:20,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20 WrapperNode [2022-01-31 11:36:20,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:36:20,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:36:20,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:36:20,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:36:20,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:36:20,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:36:20,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:36:20,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:36:20,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:36:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:20,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 11:36:20,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 11:36:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:36:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:36:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:36:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:36:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:36:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:36:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:36:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:36:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:36:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:36:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:36:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:36:20,504 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:36:20,505 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:36:20,620 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:36:20,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:36:20,624 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 11:36:20,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:36:20 BoogieIcfgContainer [2022-01-31 11:36:20,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:36:20,626 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:36:20,626 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:36:20,630 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:36:20,632 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:36:20" (1/1) ... [2022-01-31 11:36:20,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:36:20 BasicIcfg [2022-01-31 11:36:20,646 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:36:20,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:36:20,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:36:20,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:36:20,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:36:20" (1/4) ... [2022-01-31 11:36:20,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8a2f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:36:20, skipping insertion in model container [2022-01-31 11:36:20,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:36:20" (2/4) ... [2022-01-31 11:36:20,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8a2f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:36:20, skipping insertion in model container [2022-01-31 11:36:20,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:36:20" (3/4) ... [2022-01-31 11:36:20,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8a2f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:36:20, skipping insertion in model container [2022-01-31 11:36:20,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:36:20" (4/4) ... [2022-01-31 11:36:20,650 INFO L111 eAbstractionObserver]: Analyzing ICFG s22if.cJordan [2022-01-31 11:36:20,654 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:36:20,654 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:36:20,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:36:20,685 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 11:36:20,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:36:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:36:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 11:36:20,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:20,701 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] [2022-01-31 11:36:20,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 891722992, now seen corresponding path program 1 times [2022-01-31 11:36:20,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:20,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588820032] [2022-01-31 11:36:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:20,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:20,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:20,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:36:20,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588820032] [2022-01-31 11:36:20,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588820032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:36:20,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:36:20,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:36:20,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673831794] [2022-01-31 11:36:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:36:20,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:36:20,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:36:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:36:20,932 INFO L87 Difference]: Start difference. First operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:20,999 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 11:36:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:36:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 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 23 [2022-01-31 11:36:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:21,016 INFO L225 Difference]: With dead ends: 36 [2022-01-31 11:36:21,016 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 11:36:21,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:36:21,024 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:21,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:36:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 11:36:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 11:36:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 11:36:21,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2022-01-31 11:36:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:21,051 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 11:36:21,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 11:36:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 11:36:21,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:21,052 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] [2022-01-31 11:36:21,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:36:21,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1828318323, now seen corresponding path program 1 times [2022-01-31 11:36:21,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:21,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597502616] [2022-01-31 11:36:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:21,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:21,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:21,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:36:21,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597502616] [2022-01-31 11:36:21,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597502616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:36:21,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:36:21,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 11:36:21,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10260553] [2022-01-31 11:36:21,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:36:21,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 11:36:21,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 11:36:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 11:36:21,185 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:21,260 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-01-31 11:36:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 11:36:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-01-31 11:36:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:21,261 INFO L225 Difference]: With dead ends: 37 [2022-01-31 11:36:21,261 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 11:36:21,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 11:36:21,263 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:21,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 11:36:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-31 11:36:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 11:36:21,267 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-01-31 11:36:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:21,267 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 11:36:21,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 11:36:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 11:36:21,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:21,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:36:21,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 11:36:21,268 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:21,269 INFO L85 PathProgramCache]: Analyzing trace with hash -343654416, now seen corresponding path program 1 times [2022-01-31 11:36:21,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:21,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540670205] [2022-01-31 11:36:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:21,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:21,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984375301] [2022-01-31 11:36:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:21,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:21,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:36:21,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 11:36:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 11:36:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:21,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-31 11:36:21,541 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 15 treesize of output 7 [2022-01-31 11:36:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:21,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:21,631 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 37 treesize of output 31 [2022-01-31 11:36:21,638 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 11:36:21,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2022-01-31 11:36:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:21,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:21,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540670205] [2022-01-31 11:36:21,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:21,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984375301] [2022-01-31 11:36:21,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984375301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:21,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:21,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-01-31 11:36:21,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875226841] [2022-01-31 11:36:21,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:21,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:36:21,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:36:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:36:21,683 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:21,817 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-01-31 11:36:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 11:36:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 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 31 [2022-01-31 11:36:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:21,819 INFO L225 Difference]: With dead ends: 46 [2022-01-31 11:36:21,819 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 11:36:21,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:36:21,822 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:21,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 11:36:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2022-01-31 11:36:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-31 11:36:21,831 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 31 [2022-01-31 11:36:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:21,831 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-31 11:36:21,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-31 11:36:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 11:36:21,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:21,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:36:21,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 11:36:22,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:22,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2086464751, now seen corresponding path program 1 times [2022-01-31 11:36:22,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461440457] [2022-01-31 11:36:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:22,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:22,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:22,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:22,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461440457] [2022-01-31 11:36:22,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461440457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:36:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626023086] [2022-01-31 11:36:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:22,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:22,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:22,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:36:22,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 11:36:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:22,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 11:36:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:22,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:36:22,440 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 11:36:22,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:36:22,534 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 11:36:22,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-01-31 11:36:22,651 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 28 treesize of output 12 [2022-01-31 11:36:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:22,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:22,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_74 (Array Int Int)) (main_~i~0 Int) (main_~a~0.offset Int)) (let ((.cse0 (select v_ArrVal_74 (+ main_~a~0.offset (* main_~i~0 4))))) (or (= (* c_~N~0 3) (+ .cse0 (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_74) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|))) (not (= .cse0 3))))) is different from false [2022-01-31 11:36:22,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:22,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-01-31 11:36:22,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:36:22,921 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 26 treesize of output 18 [2022-01-31 11:36:22,924 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 22 treesize of output 10 [2022-01-31 11:36:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-31 11:36:22,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626023086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:22,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:36:22,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 24 [2022-01-31 11:36:22,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970694212] [2022-01-31 11:36:22,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 11:36:22,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 11:36:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=426, Unknown=1, NotChecked=42, Total=552 [2022-01-31 11:36:22,958 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 11:36:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:23,213 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-01-31 11:36:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 11:36:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 11:36:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:23,215 INFO L225 Difference]: With dead ends: 56 [2022-01-31 11:36:23,215 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 11:36:23,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=721, Unknown=1, NotChecked=56, Total=930 [2022-01-31 11:36:23,216 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:23,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 112 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-01-31 11:36:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 11:36:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-01-31 11:36:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-01-31 11:36:23,220 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2022-01-31 11:36:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:23,220 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-01-31 11:36:23,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 11:36:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-01-31 11:36:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 11:36:23,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:23,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:36:23,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 11:36:23,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 11:36:23,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash -637057423, now seen corresponding path program 1 times [2022-01-31 11:36:23,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:23,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309671085] [2022-01-31 11:36:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:23,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:23,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:23,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419150700] [2022-01-31 11:36:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:23,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:23,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:23,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:36:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 11:36:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 11:36:23,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:23,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:36:23,547 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 15 treesize of output 7 [2022-01-31 11:36:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:23,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:23,597 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 14 treesize of output 12 [2022-01-31 11:36:23,600 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 22 treesize of output 20 [2022-01-31 11:36:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309671085] [2022-01-31 11:36:23,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419150700] [2022-01-31 11:36:23,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419150700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:23,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 11:36:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127431081] [2022-01-31 11:36:23,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:23,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:36:23,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:36:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:36:23,624 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:23,677 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-01-31 11:36:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 11:36:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-31 11:36:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:23,678 INFO L225 Difference]: With dead ends: 56 [2022-01-31 11:36:23,678 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 11:36:23,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 11:36:23,679 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:23,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 134 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:36:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 11:36:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-01-31 11:36:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-01-31 11:36:23,682 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 31 [2022-01-31 11:36:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:23,682 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-01-31 11:36:23,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-01-31 11:36:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 11:36:23,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:23,683 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, 1, 1, 1, 1, 1] [2022-01-31 11:36:23,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 11:36:23,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:23,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -531940331, now seen corresponding path program 2 times [2022-01-31 11:36:23,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:23,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755050229] [2022-01-31 11:36:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:23,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:23,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:23,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755050229] [2022-01-31 11:36:23,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755050229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:36:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014765945] [2022-01-31 11:36:23,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:36:23,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:23,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:23,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:36:23,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 11:36:24,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:36:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:36:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:24,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014765945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:24,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:36:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 11:36:24,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694708608] [2022-01-31 11:36:24,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:36:24,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:36:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:36:24,155 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:24,351 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-01-31 11:36:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 11:36:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 3 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 33 [2022-01-31 11:36:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:24,352 INFO L225 Difference]: With dead ends: 69 [2022-01-31 11:36:24,352 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 11:36:24,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-31 11:36:24,353 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:24,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 54 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 11:36:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-01-31 11:36:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 11:36:24,356 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 33 [2022-01-31 11:36:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:24,356 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 11:36:24,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 11:36:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 11:36:24,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:24,357 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, 1, 1, 1, 1, 1, 1] [2022-01-31 11:36:24,378 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 11:36:24,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:24,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1196805917, now seen corresponding path program 1 times [2022-01-31 11:36:24,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626797128] [2022-01-31 11:36:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:24,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:24,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381606016] [2022-01-31 11:36:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:24,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:24,579 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 11:36:24,581 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 11:36:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:36:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:24,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 11:36:24,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626797128] [2022-01-31 11:36:24,744 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381606016] [2022-01-31 11:36:24,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381606016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:24,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:24,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:36:24,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602438133] [2022-01-31 11:36:24,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:24,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:36:24,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:36:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:36:24,746 INFO L87 Difference]: Start difference. First operand 49 states and 57 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:24,830 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-01-31 11:36:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 11:36:24,830 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 11:36:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:24,831 INFO L225 Difference]: With dead ends: 62 [2022-01-31 11:36:24,831 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 11:36:24,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:36:24,831 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:24,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 88 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 11:36:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-31 11:36:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-01-31 11:36:24,834 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2022-01-31 11:36:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:24,834 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-01-31 11:36:24,834 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-01-31 11:36:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 11:36:24,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:24,835 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, 1] [2022-01-31 11:36:24,875 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 11:36:25,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:25,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1165711052, now seen corresponding path program 2 times [2022-01-31 11:36:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420651947] [2022-01-31 11:36:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:25,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:25,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:25,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007352495] [2022-01-31 11:36:25,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:36:25,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:25,068 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 11:36:25,069 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 11:36:25,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:36:25,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 11:36:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:25,229 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 31 treesize of output 15 [2022-01-31 11:36:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:25,289 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 16 treesize of output 18 [2022-01-31 11:36:25,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:25,323 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-01-31 11:36:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:36:25,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:25,494 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_205 (Array Int Int)) (v_main_~i~0_63 Int)) (or (< (+ v_main_~i~0_63 1) c_~N~0) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_205) c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_63 4)))) (not (<= v_main_~i~0_63 (+ c_main_~i~0 1))))) is different from false [2022-01-31 11:36:25,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:25,604 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 33 [2022-01-31 11:36:25,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:25,611 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-31 11:36:25,616 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 13 treesize of output 7 [2022-01-31 11:36:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-01-31 11:36:25,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420651947] [2022-01-31 11:36:25,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:25,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007352495] [2022-01-31 11:36:25,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007352495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:25,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:25,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-01-31 11:36:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471453741] [2022-01-31 11:36:25,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:25,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 11:36:25,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 11:36:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=562, Unknown=7, NotChecked=50, Total=756 [2022-01-31 11:36:25,873 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:26,170 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-01-31 11:36:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 11:36:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 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 39 [2022-01-31 11:36:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:26,172 INFO L225 Difference]: With dead ends: 65 [2022-01-31 11:36:26,173 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 11:36:26,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=922, Unknown=8, NotChecked=66, Total=1260 [2022-01-31 11:36:26,173 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:26,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 189 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 259 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-01-31 11:36:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 11:36:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-01-31 11:36:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-01-31 11:36:26,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-01-31 11:36:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:26,177 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-01-31 11:36:26,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-01-31 11:36:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 11:36:26,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:26,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:36:26,204 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 11:36:26,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:26,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1386445909, now seen corresponding path program 3 times [2022-01-31 11:36:26,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:26,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971935533] [2022-01-31 11:36:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:26,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:26,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 11:36:26,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971935533] [2022-01-31 11:36:26,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971935533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:36:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139146221] [2022-01-31 11:36:26,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:36:26,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:26,685 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 11:36:26,686 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 11:36:26,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:36:26,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 11:36:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:26,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:36:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:26,779 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 11:36:26,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:26,790 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 11:36:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:26,831 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 11:36:26,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:26,896 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 11:36:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:27,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-01-31 11:36:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:27,107 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:36:27,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 43 [2022-01-31 11:36:27,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:27,242 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:36:27,242 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 1 case distinctions, treesize of input 39 treesize of output 15 [2022-01-31 11:36:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 11:36:27,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:29,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_79 Int) (v_main_~i~0_76 Int)) (let ((.cse4 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_249))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.base|))) (let ((.cse1 (select .cse5 |c_main_~#sum~0.offset|)) (.cse2 (select v_ArrVal_249 (+ main_~a~0.offset (* v_main_~i~0_79 4))))) (let ((.cse0 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse1 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_76 4))))) (or (let ((.cse3 (+ c_main_~i~0 1))) (and (<= (div (+ (* (- 1) .cse0) (* (- 1) .cse1) (* (- 1) .cse2)) (- 3)) .cse3) (<= .cse3 (div (+ .cse1 .cse2 .cse0) 3)))) (not (= .cse2 3)) (not (= .cse0 3)))))))) is different from false [2022-01-31 11:36:29,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_79 Int) (v_main_~i~0_76 Int)) (let ((.cse4 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_249))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.base|))) (let ((.cse1 (select .cse5 |c_main_~#sum~0.offset|)) (.cse2 (select v_ArrVal_249 (+ main_~a~0.offset (* v_main_~i~0_79 4))))) (let ((.cse3 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse1 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_76 4))))) (or (let ((.cse0 (+ c_main_~i~0 2))) (and (<= .cse0 (div (+ .cse1 .cse2 .cse3) 3)) (<= (div (+ (* (- 1) .cse3) (* (- 1) .cse1) (* (- 1) .cse2)) (- 3)) .cse0))) (not (= .cse2 3)) (not (= .cse3 3)))))))) is different from false [2022-01-31 11:36:29,641 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_249 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_79 Int) (v_main_~i~0_76 Int)) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_249))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse0 (select .cse4 |c_main_~#sum~0.offset|)) (.cse1 (select v_ArrVal_249 (+ main_~a~0.offset (* v_main_~i~0_79 4))))) (let ((.cse2 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ .cse0 .cse1))) c_main_~a~0.base) (+ main_~a~0.offset (* v_main_~i~0_76 4))))) (or (and (<= 2 (div (+ .cse0 .cse1 .cse2) 3)) (<= (div (+ (* (- 1) .cse2) (* (- 1) .cse0) (* (- 1) .cse1)) (- 3)) 2)) (not (= .cse1 3)) (not (= .cse2 3)))))))) is different from false [2022-01-31 11:36:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2022-01-31 11:36:30,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139146221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:30,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:36:30,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 40 [2022-01-31 11:36:30,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639425153] [2022-01-31 11:36:30,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:30,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 11:36:30,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 11:36:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1192, Unknown=5, NotChecked=216, Total=1560 [2022-01-31 11:36:30,050 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:30,941 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2022-01-31 11:36:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 11:36:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-01-31 11:36:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:30,942 INFO L225 Difference]: With dead ends: 97 [2022-01-31 11:36:30,942 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 11:36:30,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 63 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=281, Invalid=1982, Unknown=5, NotChecked=282, Total=2550 [2022-01-31 11:36:30,943 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:30,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 179 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 506 Invalid, 0 Unknown, 376 Unchecked, 0.3s Time] [2022-01-31 11:36:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 11:36:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2022-01-31 11:36:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 70 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-01-31 11:36:30,948 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 39 [2022-01-31 11:36:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:30,948 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-01-31 11:36:30,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-01-31 11:36:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 11:36:30,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:30,949 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, 1] [2022-01-31 11:36:30,966 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 11:36:31,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:31,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 821770708, now seen corresponding path program 1 times [2022-01-31 11:36:31,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:31,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849258380] [2022-01-31 11:36:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:31,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:31,172 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:31,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085127780] [2022-01-31 11:36:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:31,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:31,174 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 11:36:31,175 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 11:36:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:31,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 11:36:31,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:31,285 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 37 treesize of output 17 [2022-01-31 11:36:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:31,323 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 25 treesize of output 24 [2022-01-31 11:36:31,351 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 17 treesize of output 9 [2022-01-31 11:36:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 11:36:31,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:33,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_294 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_90 4)) v_ArrVal_294) c_main_~a~0.offset) 3)))) is different from false [2022-01-31 11:36:33,454 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 44 treesize of output 38 [2022-01-31 11:36:33,459 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 11:36:33,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 158 [2022-01-31 11:36:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2022-01-31 11:36:33,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:33,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849258380] [2022-01-31 11:36:33,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:33,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085127780] [2022-01-31 11:36:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085127780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:33,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:33,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 11:36:33,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740596240] [2022-01-31 11:36:33,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 11:36:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 11:36:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=138, Unknown=1, NotChecked=24, Total=210 [2022-01-31 11:36:33,521 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:35,540 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_294 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_90 4)) v_ArrVal_294) c_main_~a~0.offset) 3)))) (= c_main_~i~0 0) (= c_main_~a~0.offset 0) (= (+ (- 2) (select (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset))) 1)) is different from false [2022-01-31 11:36:37,548 WARN L838 $PredicateComparison]: unable to prove that (and (<= 1 c_main_~i~0) (= (+ (select (select |c_#memory_int| c_main_~a~0.base) c_main_~a~0.offset) (- 2)) 1) (forall ((v_main_~i~0_90 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_90)) (forall ((v_ArrVal_294 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_90 4)) v_ArrVal_294) c_main_~a~0.offset) 3)))) (= c_main_~a~0.offset 0)) is different from false [2022-01-31 11:36:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:37,633 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2022-01-31 11:36:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 11:36:37,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 39 [2022-01-31 11:36:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:37,634 INFO L225 Difference]: With dead ends: 108 [2022-01-31 11:36:37,634 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 11:36:37,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=83, Invalid=232, Unknown=3, NotChecked=102, Total=420 [2022-01-31 11:36:37,634 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:37,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-01-31 11:36:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 11:36:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2022-01-31 11:36:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 77 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-01-31 11:36:37,639 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 39 [2022-01-31 11:36:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:37,639 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-01-31 11:36:37,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-01-31 11:36:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 11:36:37,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:37,640 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-01-31 11:36:37,656 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 11:36:37,855 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,SelfDestructingSolverStorable9 [2022-01-31 11:36:37,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1676245229, now seen corresponding path program 1 times [2022-01-31 11:36:37,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:37,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510180771] [2022-01-31 11:36:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:37,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:37,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:37,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206081805] [2022-01-31 11:36:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:37,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:37,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:37,866 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 11:36:37,867 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 11:36:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:37,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 11:36:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:37,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 11:36:37,968 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 11:36:37,968 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 25 treesize of output 24 [2022-01-31 11:36:37,981 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 19 treesize of output 7 [2022-01-31 11:36:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 11:36:37,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:38,053 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 16 treesize of output 14 [2022-01-31 11:36:38,057 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 28 treesize of output 24 [2022-01-31 11:36:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 11:36:38,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:38,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510180771] [2022-01-31 11:36:38,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:38,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206081805] [2022-01-31 11:36:38,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206081805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:38,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:38,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-31 11:36:38,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129477895] [2022-01-31 11:36:38,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:38,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 11:36:38,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 11:36:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 11:36:38,080 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:38,172 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-01-31 11:36:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 11:36:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 39 [2022-01-31 11:36:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:38,173 INFO L225 Difference]: With dead ends: 82 [2022-01-31 11:36:38,173 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 11:36:38,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-31 11:36:38,173 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:38,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 11:36:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-01-31 11:36:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-01-31 11:36:38,177 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 39 [2022-01-31 11:36:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:38,177 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-01-31 11:36:38,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-01-31 11:36:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 11:36:38,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:38,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 11:36:38,195 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 11:36:38,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:38,395 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1211084633, now seen corresponding path program 3 times [2022-01-31 11:36:38,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495124174] [2022-01-31 11:36:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:38,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:38,404 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:38,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650301456] [2022-01-31 11:36:38,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:36:38,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:38,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:38,409 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 11:36:38,411 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 11:36:38,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 11:36:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:36:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 11:36:38,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 11:36:38,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495124174] [2022-01-31 11:36:38,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650301456] [2022-01-31 11:36:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650301456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:38,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:38,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 11:36:38,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651742090] [2022-01-31 11:36:38,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:38,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:36:38,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:36:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:36:38,636 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:38,744 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-01-31 11:36:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 11:36:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 11:36:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:38,745 INFO L225 Difference]: With dead ends: 84 [2022-01-31 11:36:38,745 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 11:36:38,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 11:36:38,746 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:38,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 82 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 11:36:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2022-01-31 11:36:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-01-31 11:36:38,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 42 [2022-01-31 11:36:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:38,749 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-01-31 11:36:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-01-31 11:36:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 11:36:38,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:38,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-31 11:36:38,769 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 11:36:38,961 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,SelfDestructingSolverStorable11 [2022-01-31 11:36:38,962 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:38,962 INFO L85 PathProgramCache]: Analyzing trace with hash -23692747, now seen corresponding path program 4 times [2022-01-31 11:36:38,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:38,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106001287] [2022-01-31 11:36:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:38,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:38,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411238795] [2022-01-31 11:36:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:36:38,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:38,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:38,972 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 11:36:38,973 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 11:36:39,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:36:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:36:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:39,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:39,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:39,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106001287] [2022-01-31 11:36:39,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:39,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411238795] [2022-01-31 11:36:39,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411238795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:39,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:39,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 11:36:39,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674141568] [2022-01-31 11:36:39,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:39,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:36:39,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:39,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:36:39,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:36:39,203 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:39,326 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-01-31 11:36:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 11:36:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 11:36:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:39,327 INFO L225 Difference]: With dead ends: 60 [2022-01-31 11:36:39,327 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 11:36:39,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 11:36:39,327 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:39,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 91 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 11:36:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-01-31 11:36:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 11:36:39,332 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 44 [2022-01-31 11:36:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:39,332 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 11:36:39,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 11:36:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 11:36:39,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:39,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 11:36:39,348 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 11:36:39,543 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,SelfDestructingSolverStorable12 [2022-01-31 11:36:39,543 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 845505913, now seen corresponding path program 5 times [2022-01-31 11:36:39,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:39,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632328818] [2022-01-31 11:36:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:39,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:39,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799598849] [2022-01-31 11:36:39,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:36:39,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:39,553 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 11:36:39,571 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 11:36:39,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 11:36:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 11:36:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:39,675 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 11:36:39,735 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 31 treesize of output 15 [2022-01-31 11:36:39,777 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 16 treesize of output 18 [2022-01-31 11:36:39,805 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 16 treesize of output 18 [2022-01-31 11:36:39,832 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 19 treesize of output 7 [2022-01-31 11:36:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 11:36:39,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:39,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_480) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)) 3)) is different from false [2022-01-31 11:36:39,886 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_480) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 8)))) is different from false [2022-01-31 11:36:39,895 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_480) c_main_~a~0.base) (+ c_main_~a~0.offset 8)) 3)) is different from false [2022-01-31 11:36:39,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:39,926 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 31 [2022-01-31 11:36:39,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:39,930 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-31 11:36:39,934 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 11 treesize of output 7 [2022-01-31 11:36:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 12 not checked. [2022-01-31 11:36:39,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632328818] [2022-01-31 11:36:39,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799598849] [2022-01-31 11:36:39,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799598849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:39,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:39,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-01-31 11:36:39,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881629153] [2022-01-31 11:36:39,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:39,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 11:36:39,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 11:36:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=195, Unknown=3, NotChecked=90, Total=342 [2022-01-31 11:36:39,997 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:40,154 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-01-31 11:36:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 11:36:40,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 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 47 [2022-01-31 11:36:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:40,155 INFO L225 Difference]: With dead ends: 75 [2022-01-31 11:36:40,155 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 11:36:40,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=245, Unknown=3, NotChecked=102, Total=420 [2022-01-31 11:36:40,156 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:40,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 186 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 213 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-01-31 11:36:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 11:36:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-01-31 11:36:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2022-01-31 11:36:40,158 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 47 [2022-01-31 11:36:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:40,159 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2022-01-31 11:36:40,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2022-01-31 11:36:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 11:36:40,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:40,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 11:36:40,182 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 11:36:40,371 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,SelfDestructingSolverStorable13 [2022-01-31 11:36:40,371 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -897304422, now seen corresponding path program 6 times [2022-01-31 11:36:40,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:40,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841928889] [2022-01-31 11:36:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:40,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:40,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723592001] [2022-01-31 11:36:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:36:40,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:40,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:40,386 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 11:36:40,387 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 11:36:40,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 11:36:40,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 11:36:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:40,554 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 31 treesize of output 15 [2022-01-31 11:36:40,583 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 11:36:40,584 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 25 treesize of output 30 [2022-01-31 11:36:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:40,683 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 20 treesize of output 22 [2022-01-31 11:36:40,718 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 11:36:40,718 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 14 [2022-01-31 11:36:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 11:36:40,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:40,858 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_535 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)) 3)) (<= c_~N~0 (+ c_main_~i~0 2))) is different from false [2022-01-31 11:36:40,879 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~N~0 2) (forall ((v_ArrVal_535 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))) is different from false [2022-01-31 11:36:40,890 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_535 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ c_main_~a~0.offset 4)))) (<= c_main_~i~0 2)) is different from false [2022-01-31 11:36:40,896 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_main_~i~0 1) (forall ((v_ArrVal_535 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))) is different from false [2022-01-31 11:36:40,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (<= main_~i~0 1) (forall ((v_ArrVal_535 (Array Int Int)) (v_ArrVal_534 Int)) (= 3 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_534)) |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ c_main_~a~0.offset 4)))))) is different from false [2022-01-31 11:36:41,509 INFO L353 Elim1Store]: treesize reduction 28, result has 56.3 percent of original size [2022-01-31 11:36:41,510 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 52 [2022-01-31 11:36:41,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:41,515 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-01-31 11:36:41,519 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 11 treesize of output 7 [2022-01-31 11:36:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 13 not checked. [2022-01-31 11:36:41,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841928889] [2022-01-31 11:36:41,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723592001] [2022-01-31 11:36:41,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723592001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:41,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:41,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-01-31 11:36:41,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449896350] [2022-01-31 11:36:41,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:41,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 11:36:41,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 11:36:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=498, Unknown=5, NotChecked=250, Total=870 [2022-01-31 11:36:41,626 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:43,713 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3))) (and (= 0 (+ (- 1) c_main_~i~0)) (forall ((main_~i~0 Int)) (or (<= main_~i~0 1) (forall ((v_ArrVal_535 (Array Int Int)) (v_ArrVal_534 Int)) (= 3 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_534)) |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ c_main_~a~0.offset 4)))))) (< (+ c_main_~a~0.base 1) |c_main_~#sum~0.base|) .cse0 (or (<= c_~N~0 2) .cse0) (= c_main_~i~0 1))) is different from false [2022-01-31 11:36:45,716 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((main_~i~0 Int)) (or (<= main_~i~0 1) (forall ((v_ArrVal_535 (Array Int Int)) (v_ArrVal_534 Int)) (= 3 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_534)) |c_main_~#sum~0.base| v_ArrVal_535) c_main_~a~0.base) (+ c_main_~a~0.offset 4)))))) (< (+ c_main_~a~0.base 1) |c_main_~#sum~0.base|) (= (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3)) is different from false [2022-01-31 11:36:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:46,008 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2022-01-31 11:36:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 11:36:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 47 [2022-01-31 11:36:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:46,009 INFO L225 Difference]: With dead ends: 100 [2022-01-31 11:36:46,009 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 11:36:46,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=225, Invalid=852, Unknown=7, NotChecked=476, Total=1560 [2022-01-31 11:36:46,010 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:46,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 237 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 323 Invalid, 0 Unknown, 286 Unchecked, 0.2s Time] [2022-01-31 11:36:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 11:36:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2022-01-31 11:36:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-01-31 11:36:46,014 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 47 [2022-01-31 11:36:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:46,014 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-01-31 11:36:46,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-01-31 11:36:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 11:36:46,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:46,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2022-01-31 11:36:46,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 11:36:46,227 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,SelfDestructingSolverStorable14 [2022-01-31 11:36:46,227 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:46,228 INFO L85 PathProgramCache]: Analyzing trace with hash 899646937, now seen corresponding path program 4 times [2022-01-31 11:36:46,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:46,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133449085] [2022-01-31 11:36:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:46,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:46,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:46,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:46,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133449085] [2022-01-31 11:36:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133449085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:36:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925316998] [2022-01-31 11:36:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:36:46,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:46,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:46,658 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 11:36:46,659 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 11:36:46,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:36:46,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 11:36:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:46,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:36:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:46,770 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 11:36:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:46,811 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 11:36:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:46,853 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 11:36:46,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:46,970 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 11:36:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:46,998 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 11:36:47,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:47,025 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 11:36:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:47,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-01-31 11:36:47,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:47,230 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:36:47,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 43 [2022-01-31 11:36:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:47,380 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:36:47,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-01-31 11:36:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:47,510 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:36:47,511 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 1 case distinctions, treesize of input 39 treesize of output 15 [2022-01-31 11:36:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:47,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:53,354 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_169 Int) (main_~i~0 Int) (v_ArrVal_593 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_171 Int)) (let ((.cse4 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_593))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.base|))) (let ((.cse0 (select v_ArrVal_593 (+ main_~a~0.offset (* main_~i~0 4)))) (.cse3 (select .cse5 |c_main_~#sum~0.offset|))) (let ((.cse1 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_171))))) (let ((.cse2 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse1 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_169))))) (or (not (= .cse0 3)) (not (= .cse1 3)) (= (+ .cse0 .cse1 .cse2 .cse3) (* c_~N~0 3)) (not (= 3 .cse2))))))))) is different from false [2022-01-31 11:36:54,143 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_main_~i~0_169 Int) (v_main_~i~0_178 Int) (v_ArrVal_593 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_171 Int)) (let ((.cse4 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_593))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.base|))) (let ((.cse0 (select v_ArrVal_593 (+ main_~a~0.offset (* 4 v_main_~i~0_178)))) (.cse2 (select .cse5 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_171))))) (let ((.cse1 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse2 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_169))))) (or (= (* 3 ~N~0) (+ .cse0 .cse1 .cse2 .cse3)) (not (= 3 .cse1)) (not (= 3 .cse0)) (not (= 3 .cse3))))))))) (< (+ c_main_~i~0 1) ~N~0) (not (< c_main_~i~0 ~N~0)))) is different from false [2022-01-31 11:36:54,255 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_169 Int) (v_main_~i~0_178 Int) (~N~0 Int) (v_ArrVal_593 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_171 Int)) (let ((.cse4 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_593))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.base|))) (let ((.cse0 (select v_ArrVal_593 (+ main_~a~0.offset (* 4 v_main_~i~0_178)))) (.cse2 (select .cse5 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_171))))) (let ((.cse1 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse2 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_169))))) (or (= (* 3 ~N~0) (+ .cse0 .cse1 .cse2 .cse3)) (not (= 3 .cse1)) (not (= 3 .cse0)) (not (< (+ c_main_~i~0 1) ~N~0)) (not (= 3 .cse3)) (< (+ c_main_~i~0 2) ~N~0)))))))) is different from false [2022-01-31 11:36:54,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_169 Int) (v_main_~i~0_178 Int) (~N~0 Int) (v_ArrVal_593 (Array Int Int)) (main_~a~0.offset Int) (v_main_~i~0_171 Int)) (let ((.cse4 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_593))) (let ((.cse5 (select .cse4 |c_main_~#sum~0.base|))) (let ((.cse0 (select v_ArrVal_593 (+ main_~a~0.offset (* 4 v_main_~i~0_178)))) (.cse2 (select .cse5 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse2))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_171))))) (let ((.cse1 (select (select (store .cse4 |c_main_~#sum~0.base| (store .cse5 |c_main_~#sum~0.offset| (+ .cse0 .cse2 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_169))))) (or (= (* 3 ~N~0) (+ .cse0 .cse1 .cse2 .cse3)) (< (+ c_main_~i~0 3) ~N~0) (not (= 3 .cse1)) (not (= 3 .cse0)) (not (< (+ c_main_~i~0 2) ~N~0)) (not (= 3 .cse3))))))))) is different from false [2022-01-31 11:36:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 14 not checked. [2022-01-31 11:36:54,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925316998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:54,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:36:54,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 18] total 48 [2022-01-31 11:36:54,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239720587] [2022-01-31 11:36:54,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:54,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 11:36:54,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:54,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 11:36:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1744, Unknown=8, NotChecked=348, Total=2256 [2022-01-31 11:36:54,704 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 48 states, 46 states have (on average 1.891304347826087) internal successors, (87), 45 states have internal predecessors, (87), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:56,102 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2022-01-31 11:36:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 11:36:56,102 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.891304347826087) internal successors, (87), 45 states have internal predecessors, (87), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-01-31 11:36:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:56,103 INFO L225 Difference]: With dead ends: 134 [2022-01-31 11:36:56,103 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 11:36:56,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=406, Invalid=3384, Unknown=8, NotChecked=492, Total=4290 [2022-01-31 11:36:56,104 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:56,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 258 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 769 Invalid, 0 Unknown, 549 Unchecked, 0.4s Time] [2022-01-31 11:36:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 11:36:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-01-31 11:36:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 118 states have (on average 1.2457627118644068) internal successors, (147), 118 states have internal predecessors, (147), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 153 transitions. [2022-01-31 11:36:56,107 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 153 transitions. Word has length 47 [2022-01-31 11:36:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:56,107 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 153 transitions. [2022-01-31 11:36:56,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.891304347826087) internal successors, (87), 45 states have internal predecessors, (87), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 153 transitions. [2022-01-31 11:36:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 11:36:56,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:56,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-01-31 11:36:56,124 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 11:36:56,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:56,324 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1034042, now seen corresponding path program 2 times [2022-01-31 11:36:56,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786897242] [2022-01-31 11:36:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:56,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:56,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:56,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492344653] [2022-01-31 11:36:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:36:56,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:56,334 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 11:36:56,335 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 11:36:56,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:36:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 11:36:56,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:56,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 11:36:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:56,477 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 25 treesize of output 24 [2022-01-31 11:36:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:56,502 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 25 treesize of output 24 [2022-01-31 11:36:56,520 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 15 treesize of output 7 [2022-01-31 11:36:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:56,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:56,646 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 16 treesize of output 14 [2022-01-31 11:36:56,647 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 28 treesize of output 24 [2022-01-31 11:36:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:56,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786897242] [2022-01-31 11:36:56,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492344653] [2022-01-31 11:36:56,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492344653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:56,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:56,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-01-31 11:36:56,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915640050] [2022-01-31 11:36:56,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:56,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 11:36:56,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 11:36:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-31 11:36:56,692 INFO L87 Difference]: Start difference. First operand 125 states and 153 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:56,862 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2022-01-31 11:36:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 11:36:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 47 [2022-01-31 11:36:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:56,863 INFO L225 Difference]: With dead ends: 132 [2022-01-31 11:36:56,863 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 11:36:56,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-31 11:36:56,863 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:56,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 194 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 11:36:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2022-01-31 11:36:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 114 states have (on average 1.219298245614035) internal successors, (139), 114 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2022-01-31 11:36:56,866 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 47 [2022-01-31 11:36:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:56,866 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2022-01-31 11:36:56,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2022-01-31 11:36:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 11:36:56,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:56,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1] [2022-01-31 11:36:56,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 11:36:57,083 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,SelfDestructingSolverStorable16 [2022-01-31 11:36:57,083 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:57,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:57,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1182980387, now seen corresponding path program 5 times [2022-01-31 11:36:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130880953] [2022-01-31 11:36:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:57,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:36:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:57,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:36:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:57,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:57,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130880953] [2022-01-31 11:36:57,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130880953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:36:57,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948313202] [2022-01-31 11:36:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:36:57,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:57,234 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 11:36:57,235 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 11:36:57,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 11:36:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 11:36:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:57,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:57,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948313202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:57,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:36:57,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 11:36:57,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990365524] [2022-01-31 11:36:57,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:57,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:36:57,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:36:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 11:36:57,556 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:57,834 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2022-01-31 11:36:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 11:36:57,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (5), 3 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 49 [2022-01-31 11:36:57,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:57,835 INFO L225 Difference]: With dead ends: 142 [2022-01-31 11:36:57,835 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 11:36:57,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-01-31 11:36:57,836 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:57,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 54 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:36:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 11:36:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2022-01-31 11:36:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 108 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2022-01-31 11:36:57,838 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 49 [2022-01-31 11:36:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:57,839 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2022-01-31 11:36:57,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2022-01-31 11:36:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 11:36:57,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:57,839 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1] [2022-01-31 11:36:57,858 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 11:36:58,051 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,SelfDestructingSolverStorable17 [2022-01-31 11:36:58,051 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:58,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1207498923, now seen corresponding path program 7 times [2022-01-31 11:36:58,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:58,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995938815] [2022-01-31 11:36:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:58,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:58,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746191430] [2022-01-31 11:36:58,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 11:36:58,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:58,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:58,061 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 11:36:58,062 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 11:36:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:36:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 11:36:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 11:36:58,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995938815] [2022-01-31 11:36:58,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746191430] [2022-01-31 11:36:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746191430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:58,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:58,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 11:36:58,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418859480] [2022-01-31 11:36:58,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:58,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 11:36:58,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:58,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 11:36:58,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:36:58,347 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:58,501 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-01-31 11:36:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 11:36:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 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 50 [2022-01-31 11:36:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:58,502 INFO L225 Difference]: With dead ends: 90 [2022-01-31 11:36:58,502 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 11:36:58,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-31 11:36:58,502 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:58,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 143 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:36:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 11:36:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-01-31 11:36:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-01-31 11:36:58,504 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2022-01-31 11:36:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:58,504 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-01-31 11:36:58,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-01-31 11:36:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 11:36:58,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:58,505 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:36:58,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-31 11:36:58,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:58,722 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash -392195492, now seen corresponding path program 8 times [2022-01-31 11:36:58,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:58,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769900867] [2022-01-31 11:36:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:58,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:58,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:58,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59851909] [2022-01-31 11:36:58,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:36:58,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:58,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:58,732 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 11:36:58,737 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 11:36:58,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:36:58,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:58,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 11:36:58,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:36:58,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-31 11:36:58,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:58,968 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 16 treesize of output 18 [2022-01-31 11:36:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:59,002 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 16 treesize of output 18 [2022-01-31 11:36:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:36:59,038 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 16 treesize of output 18 [2022-01-31 11:36:59,064 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 19 treesize of output 7 [2022-01-31 11:36:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 11:36:59,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:36:59,117 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_830 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_830) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)))) is different from false [2022-01-31 11:36:59,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_830 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_830) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 8)))) is different from false [2022-01-31 11:36:59,132 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_830 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_830) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 12)))) is different from false [2022-01-31 11:36:59,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_830 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_830) c_main_~a~0.base) (+ c_main_~a~0.offset 12)))) is different from false [2022-01-31 11:36:59,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:59,173 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 31 [2022-01-31 11:36:59,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:36:59,184 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-31 11:36:59,186 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 11 treesize of output 7 [2022-01-31 11:36:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 22 not checked. [2022-01-31 11:36:59,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:36:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769900867] [2022-01-31 11:36:59,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:36:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59851909] [2022-01-31 11:36:59,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59851909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:36:59,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:36:59,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-01-31 11:36:59,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000474593] [2022-01-31 11:36:59,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:36:59,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 11:36:59,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:36:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 11:36:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=421, Unknown=4, NotChecked=180, Total=702 [2022-01-31 11:36:59,336 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:36:59,617 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2022-01-31 11:36:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 11:36:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 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 55 [2022-01-31 11:36:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:36:59,618 INFO L225 Difference]: With dead ends: 94 [2022-01-31 11:36:59,618 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 11:36:59,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=579, Unknown=4, NotChecked=212, Total=930 [2022-01-31 11:36:59,618 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:36:59,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 217 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 301 Invalid, 0 Unknown, 235 Unchecked, 0.1s Time] [2022-01-31 11:36:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 11:36:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2022-01-31 11:36:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:36:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-01-31 11:36:59,621 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 55 [2022-01-31 11:36:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:36:59,621 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-01-31 11:36:59,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:36:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-01-31 11:36:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 11:36:59,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:36:59,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1] [2022-01-31 11:36:59,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 11:36:59,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:59,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:36:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:36:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2135005827, now seen corresponding path program 9 times [2022-01-31 11:36:59,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:36:59,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468510795] [2022-01-31 11:36:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:36:59,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:36:59,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:36:59,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577775390] [2022-01-31 11:36:59,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:36:59,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:36:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:36:59,838 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 11:36:59,854 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 11:36:59,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 11:36:59,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:36:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 11:36:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:37:00,094 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 31 treesize of output 15 [2022-01-31 11:37:00,152 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 11:37:00,152 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 25 treesize of output 30 [2022-01-31 11:37:00,222 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 11:37:00,223 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 29 treesize of output 34 [2022-01-31 11:37:00,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:00,317 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 16 treesize of output 18 [2022-01-31 11:37:00,347 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 19 treesize of output 7 [2022-01-31 11:37:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 11:37:00,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:37:00,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_899) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)) 3)) is different from false [2022-01-31 11:37:00,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_899) c_main_~a~0.base) (+ c_main_~a~0.offset 4)))) is different from false [2022-01-31 11:37:00,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_895 Int) (main_~i~0 Int) (v_ArrVal_899 (Array Int Int)) (v_main_~i~0_270 Int) (v_ArrVal_897 Int)) (or (< (+ v_main_~i~0_270 1) c_~N~0) (not (<= v_main_~i~0_270 (+ main_~i~0 1))) (= (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_895) (+ c_main_~a~0.offset (* 4 v_main_~i~0_270)) v_ArrVal_897)) |c_main_~#sum~0.base| v_ArrVal_899) c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3))) is different from false [2022-01-31 11:37:00,733 INFO L353 Elim1Store]: treesize reduction 96, result has 40.4 percent of original size [2022-01-31 11:37:00,733 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 81 [2022-01-31 11:37:00,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:37:00,748 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 76 treesize of output 98 [2022-01-31 11:37:00,754 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 11 treesize of output 7 [2022-01-31 11:37:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 12 not checked. [2022-01-31 11:37:01,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:37:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468510795] [2022-01-31 11:37:01,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:37:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577775390] [2022-01-31 11:37:01,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577775390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:37:01,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:37:01,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2022-01-31 11:37:01,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995536464] [2022-01-31 11:37:01,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:37:01,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 11:37:01,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:37:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 11:37:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=874, Unknown=4, NotChecked=192, Total=1260 [2022-01-31 11:37:01,084 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:02,890 WARN L838 $PredicateComparison]: unable to prove that (and (<= 1 c_main_~i~0) (< (+ c_main_~a~0.base 1) |c_main_~#sum~0.base|) (= (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3) (= c_main_~i~0 1) (< 3 c_~N~0) (forall ((v_ArrVal_895 Int) (main_~i~0 Int) (v_ArrVal_899 (Array Int Int)) (v_main_~i~0_270 Int) (v_ArrVal_897 Int)) (or (< (+ v_main_~i~0_270 1) c_~N~0) (not (<= v_main_~i~0_270 (+ main_~i~0 1))) (= (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_895) (+ c_main_~a~0.offset (* 4 v_main_~i~0_270)) v_ArrVal_897)) |c_main_~#sum~0.base| v_ArrVal_899) c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3)))) is different from false [2022-01-31 11:37:04,898 WARN L838 $PredicateComparison]: unable to prove that (and (< (+ c_main_~a~0.base 1) |c_main_~#sum~0.base|) (= (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3) (< 3 c_~N~0) (forall ((v_ArrVal_895 Int) (main_~i~0 Int) (v_ArrVal_899 (Array Int Int)) (v_main_~i~0_270 Int) (v_ArrVal_897 Int)) (or (< (+ v_main_~i~0_270 1) c_~N~0) (not (<= v_main_~i~0_270 (+ main_~i~0 1))) (= (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_895) (+ c_main_~a~0.offset (* 4 v_main_~i~0_270)) v_ArrVal_897)) |c_main_~#sum~0.base| v_ArrVal_899) c_main_~a~0.base) (+ c_main_~a~0.offset 4)) 3)))) is different from false [2022-01-31 11:37:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:37:05,291 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2022-01-31 11:37:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 11:37:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 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 55 [2022-01-31 11:37:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:37:05,292 INFO L225 Difference]: With dead ends: 95 [2022-01-31 11:37:05,292 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 11:37:05,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=348, Invalid=1306, Unknown=6, NotChecked=410, Total=2070 [2022-01-31 11:37:05,292 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:37:05,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 291 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 512 Invalid, 0 Unknown, 292 Unchecked, 0.3s Time] [2022-01-31 11:37:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 11:37:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2022-01-31 11:37:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:37:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2022-01-31 11:37:05,294 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 55 [2022-01-31 11:37:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:37:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2022-01-31 11:37:05,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2022-01-31 11:37:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 11:37:05,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:37:05,295 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1] [2022-01-31 11:37:05,331 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 11:37:05,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:37:05,511 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:37:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:37:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash 113363133, now seen corresponding path program 10 times [2022-01-31 11:37:05,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:37:05,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925272528] [2022-01-31 11:37:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:37:05,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:37:05,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:37:05,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661293244] [2022-01-31 11:37:05,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:37:05,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:37:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:37:05,522 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 11:37:05,523 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 11:37:05,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:37:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:37:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 11:37:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:37:05,712 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 31 treesize of output 15 [2022-01-31 11:37:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:05,763 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 16 treesize of output 18 [2022-01-31 11:37:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:05,798 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 16 treesize of output 18 [2022-01-31 11:37:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:05,839 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 16 treesize of output 18 [2022-01-31 11:37:05,869 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 19 treesize of output 7 [2022-01-31 11:37:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 11:37:05,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:37:05,928 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_966 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_966) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)) 3)) is different from false [2022-01-31 11:37:05,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_966 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_966) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 8)))) is different from false [2022-01-31 11:37:05,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_966 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_966) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 12)))) is different from false [2022-01-31 11:37:05,958 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_966 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_966) c_main_~a~0.base) (+ c_main_~a~0.offset 12)))) is different from false [2022-01-31 11:37:05,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:37:05,992 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 31 [2022-01-31 11:37:05,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:37:05,996 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-31 11:37:05,998 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 11 treesize of output 7 [2022-01-31 11:37:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 22 not checked. [2022-01-31 11:37:06,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:37:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925272528] [2022-01-31 11:37:06,129 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:37:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661293244] [2022-01-31 11:37:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661293244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:37:06,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:37:06,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-01-31 11:37:06,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800693361] [2022-01-31 11:37:06,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:37:06,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 11:37:06,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:37:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 11:37:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=421, Unknown=4, NotChecked=180, Total=702 [2022-01-31 11:37:06,130 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:37:06,505 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2022-01-31 11:37:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 11:37:06,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 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 55 [2022-01-31 11:37:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:37:06,507 INFO L225 Difference]: With dead ends: 95 [2022-01-31 11:37:06,507 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 11:37:06,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=495, Unknown=4, NotChecked=196, Total=812 [2022-01-31 11:37:06,508 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 122 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:37:06,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 198 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 533 Invalid, 0 Unknown, 344 Unchecked, 0.3s Time] [2022-01-31 11:37:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 11:37:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-01-31 11:37:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 78 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:37:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-01-31 11:37:06,510 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 55 [2022-01-31 11:37:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:37:06,510 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-01-31 11:37:06,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-01-31 11:37:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 11:37:06,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:37:06,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:37:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 11:37:06,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 11:37:06,724 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:37:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:37:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1629447202, now seen corresponding path program 11 times [2022-01-31 11:37:06,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:37:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476675240] [2022-01-31 11:37:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:37:06,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:37:06,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:37:06,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181322485] [2022-01-31 11:37:06,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:37:06,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:37:06,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:37:06,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:37:06,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 11:37:06,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 11:37:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:37:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 11:37:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:37:06,883 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 11:37:06,973 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 37 treesize of output 17 [2022-01-31 11:37:07,013 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 11:37:07,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 11:37:07,053 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 16 treesize of output 18 [2022-01-31 11:37:07,079 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 16 treesize of output 18 [2022-01-31 11:37:07,105 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 19 treesize of output 7 [2022-01-31 11:37:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 11:37:07,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:37:07,166 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1035 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1035) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4)))) is different from false [2022-01-31 11:37:07,172 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1035 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1035) c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 8)) 3)) is different from false [2022-01-31 11:37:07,188 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1035 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_main_~#sum~0.base| v_ArrVal_1035) c_main_~a~0.base) (+ c_main_~a~0.offset 8)) 3)) is different from false [2022-01-31 11:37:07,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1032 Int) (v_ArrVal_1035 (Array Int Int))) (= 3 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset) v_ArrVal_1032)) |c_main_~#sum~0.base| v_ArrVal_1035) c_main_~a~0.base) (+ c_main_~a~0.offset 8)))) is different from false [2022-01-31 11:37:07,207 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1032 Int) (v_ArrVal_1035 (Array Int Int))) (= 3 (select (select (store (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4) v_ArrVal_1032)) |c_main_~#sum~0.base| v_ArrVal_1035) c_main_~a~0.base) (+ c_main_~a~0.offset 8)))) is different from false [2022-01-31 11:37:07,240 INFO L353 Elim1Store]: treesize reduction 39, result has 41.8 percent of original size [2022-01-31 11:37:07,241 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 44 [2022-01-31 11:37:07,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 11:37:07,246 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-31 11:37:07,248 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 11 treesize of output 7 [2022-01-31 11:37:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 22 not checked. [2022-01-31 11:37:07,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:37:07,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476675240] [2022-01-31 11:37:07,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:37:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181322485] [2022-01-31 11:37:07,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181322485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:37:07,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:37:07,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2022-01-31 11:37:07,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095820790] [2022-01-31 11:37:07,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:37:07,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 11:37:07,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:37:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 11:37:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=252, Unknown=5, NotChecked=180, Total=506 [2022-01-31 11:37:07,314 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:07,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:37:07,613 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2022-01-31 11:37:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 11:37:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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 55 [2022-01-31 11:37:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:37:07,614 INFO L225 Difference]: With dead ends: 115 [2022-01-31 11:37:07,614 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 11:37:07,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=345, Unknown=5, NotChecked=210, Total=650 [2022-01-31 11:37:07,614 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:37:07,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 243 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 370 Invalid, 0 Unknown, 295 Unchecked, 0.2s Time] [2022-01-31 11:37:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 11:37:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-01-31 11:37:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 96 states have internal predecessors, (116), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:37:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-01-31 11:37:07,616 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 55 [2022-01-31 11:37:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:37:07,616 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-01-31 11:37:07,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-01-31 11:37:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 11:37:07,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:37:07,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:37:07,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 11:37:07,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 11:37:07,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:37:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:37:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 167504157, now seen corresponding path program 6 times [2022-01-31 11:37:07,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:37:07,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477546524] [2022-01-31 11:37:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:37:07,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:37:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:37:08,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:37:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:37:08,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:37:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:37:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 11:37:08,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:37:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477546524] [2022-01-31 11:37:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477546524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:37:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814356087] [2022-01-31 11:37:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:37:08,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:37:08,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:37:08,536 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:37:08,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 11:37:08,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 11:37:08,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:37:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 11:37:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:37:08,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:37:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,743 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 11:37:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,754 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 11:37:08,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,767 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 11:37:08,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 11:37:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,838 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 11:37:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,898 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 11:37:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:08,945 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 11:37:09,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:09,037 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 11:37:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:09,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-01-31 11:37:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:09,322 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:37:09,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 43 [2022-01-31 11:37:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:09,461 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:37:09,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-01-31 11:37:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:09,622 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:37:09,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2022-01-31 11:37:09,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:09,769 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 11:37:09,769 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 1 case distinctions, treesize of input 67 treesize of output 23 [2022-01-31 11:37:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 11:37:09,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:37:30,553 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_main_~i~0_333 Int) (v_ArrVal_1107 (Array Int Int)) (v_main_~i~0_340 Int) (main_~a~0.offset Int) (v_main_~i~0_337 Int) (v_main_~i~0_335 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_1107))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse1 (select v_ArrVal_1107 (+ main_~a~0.offset (* 4 v_main_~i~0_340)))) (.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4))) c_main_~a~0.base) (+ (* 4 v_main_~i~0_337) main_~a~0.offset)))) (let ((.cse0 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_335))))) (let ((.cse2 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse0 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_333))))) (or (not (= 3 .cse0)) (not (= .cse1 3)) (not (= 3 .cse2)) (not (= 3 .cse3)) (= (+ .cse1 .cse2 .cse0 .cse4 .cse3) (* 3 ~N~0)))))))))) (< (+ c_main_~i~0 1) ~N~0) (not (< c_main_~i~0 ~N~0)))) is different from false [2022-01-31 11:37:30,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_333 Int) (v_ArrVal_1107 (Array Int Int)) (v_main_~i~0_340 Int) (~N~0 Int) (main_~a~0.offset Int) (v_main_~i~0_337 Int) (v_main_~i~0_335 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_1107))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse1 (select v_ArrVal_1107 (+ main_~a~0.offset (* 4 v_main_~i~0_340)))) (.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4))) c_main_~a~0.base) (+ (* 4 v_main_~i~0_337) main_~a~0.offset)))) (let ((.cse0 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_335))))) (let ((.cse2 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse0 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_333))))) (or (not (= 3 .cse0)) (not (= .cse1 3)) (not (= 3 .cse2)) (not (= 3 .cse3)) (= (+ .cse1 .cse2 .cse0 .cse4 .cse3) (* 3 ~N~0)) (not (< (+ c_main_~i~0 1) ~N~0)) (< (+ c_main_~i~0 2) ~N~0))))))))) is different from false [2022-01-31 11:37:32,300 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_333 Int) (v_ArrVal_1107 (Array Int Int)) (v_main_~i~0_340 Int) (~N~0 Int) (main_~a~0.offset Int) (v_main_~i~0_337 Int) (v_main_~i~0_335 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_1107))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse1 (select v_ArrVal_1107 (+ main_~a~0.offset (* 4 v_main_~i~0_340)))) (.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4))) c_main_~a~0.base) (+ (* 4 v_main_~i~0_337) main_~a~0.offset)))) (let ((.cse0 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_335))))) (let ((.cse2 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse0 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_333))))) (or (not (= 3 .cse0)) (< (+ c_main_~i~0 3) ~N~0) (not (< (+ c_main_~i~0 2) ~N~0)) (not (= .cse1 3)) (not (= 3 .cse2)) (not (= 3 .cse3)) (= (+ .cse1 .cse2 .cse0 .cse4 .cse3) (* 3 ~N~0)))))))))) is different from false [2022-01-31 11:37:33,559 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_333 Int) (v_ArrVal_1107 (Array Int Int)) (v_main_~i~0_340 Int) (~N~0 Int) (main_~a~0.offset Int) (v_main_~i~0_337 Int) (v_main_~i~0_335 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_1107))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse1 (select v_ArrVal_1107 (+ main_~a~0.offset (* 4 v_main_~i~0_340)))) (.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4))) c_main_~a~0.base) (+ (* 4 v_main_~i~0_337) main_~a~0.offset)))) (let ((.cse0 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_335))))) (let ((.cse2 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse0 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_333))))) (or (< (+ c_main_~i~0 4) ~N~0) (not (= 3 .cse0)) (not (< (+ c_main_~i~0 3) ~N~0)) (not (= .cse1 3)) (not (= 3 .cse2)) (not (= 3 .cse3)) (= (+ .cse1 .cse2 .cse0 .cse4 .cse3) (* 3 ~N~0)))))))))) is different from false [2022-01-31 11:37:34,920 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_333 Int) (v_ArrVal_1107 (Array Int Int)) (v_main_~i~0_340 Int) (~N~0 Int) (main_~a~0.offset Int) (v_main_~i~0_337 Int) (v_main_~i~0_335 Int)) (let ((.cse5 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_1107))) (let ((.cse6 (select .cse5 |c_main_~#sum~0.base|))) (let ((.cse1 (select v_ArrVal_1107 (+ main_~a~0.offset (* 4 v_main_~i~0_340)))) (.cse4 (select .cse6 |c_main_~#sum~0.offset|))) (let ((.cse3 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4))) c_main_~a~0.base) (+ (* 4 v_main_~i~0_337) main_~a~0.offset)))) (let ((.cse0 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_335))))) (let ((.cse2 (select (select (store .cse5 |c_main_~#sum~0.base| (store .cse6 |c_main_~#sum~0.offset| (+ .cse1 .cse0 .cse4 .cse3))) c_main_~a~0.base) (+ main_~a~0.offset (* 4 v_main_~i~0_333))))) (or (not (= 3 .cse0)) (< 4 ~N~0) (not (= .cse1 3)) (not (= 3 .cse2)) (not (< 3 ~N~0)) (not (= 3 .cse3)) (= (+ .cse1 .cse2 .cse0 .cse4 .cse3) (* 3 ~N~0)))))))))) is different from false [2022-01-31 11:37:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 22 not checked. [2022-01-31 11:37:39,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814356087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:37:39,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:37:39,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 22] total 62 [2022-01-31 11:37:39,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74756969] [2022-01-31 11:37:39,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:37:39,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 11:37:39,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:37:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 11:37:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2958, Unknown=16, NotChecked=570, Total=3782 [2022-01-31 11:37:39,770 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 62 states, 60 states have (on average 1.85) internal successors, (111), 59 states have internal predecessors, (111), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:37:43,724 INFO L93 Difference]: Finished difference Result 197 states and 243 transitions. [2022-01-31 11:37:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 11:37:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 1.85) internal successors, (111), 59 states have internal predecessors, (111), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-01-31 11:37:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:37:43,725 INFO L225 Difference]: With dead ends: 197 [2022-01-31 11:37:43,725 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 11:37:43,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 17 SemanticMatches, 77 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=502, Invalid=4904, Unknown=16, NotChecked=740, Total=6162 [2022-01-31 11:37:43,727 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1099 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 11:37:43,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 309 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1262 Invalid, 0 Unknown, 1099 Unchecked, 0.7s Time] [2022-01-31 11:37:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 11:37:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2022-01-31 11:37:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 167 states have (on average 1.251497005988024) internal successors, (209), 167 states have internal predecessors, (209), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:37:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-01-31 11:37:43,730 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 55 [2022-01-31 11:37:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:37:43,730 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-01-31 11:37:43,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 1.85) internal successors, (111), 59 states have internal predecessors, (111), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:37:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-01-31 11:37:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 11:37:43,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:37:43,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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 11:37:43,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 11:37:43,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:37:43,943 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:37:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:37:43,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1225567900, now seen corresponding path program 3 times [2022-01-31 11:37:43,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:37:43,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222486491] [2022-01-31 11:37:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:37:43,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:37:43,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:37:43,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346177638] [2022-01-31 11:37:43,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:37:43,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:37:43,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:37:43,964 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:37:43,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 11:37:44,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 11:37:44,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:37:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 11:37:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:37:44,160 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 37 treesize of output 17 [2022-01-31 11:37:44,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:44,203 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 25 treesize of output 24 [2022-01-31 11:37:44,250 INFO L353 Elim1Store]: treesize reduction 32, result has 30.4 percent of original size [2022-01-31 11:37:44,250 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 44 treesize of output 33 [2022-01-31 11:37:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:37:44,317 INFO L353 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2022-01-31 11:37:44,317 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 3 case distinctions, treesize of input 34 treesize of output 50 [2022-01-31 11:37:44,476 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 15 treesize of output 7 [2022-01-31 11:37:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 11:37:44,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:37:46,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (< (+ main_~i~0 1) c_~N~0) (forall ((v_ArrVal_1185 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) v_ArrVal_1185) c_main_~a~0.offset) 3)))) is different from false [2022-01-31 11:37:47,497 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1185 Int) (v_main_~i~0_363 Int) (v_main_~i~0_361 Int) (v_ArrVal_1180 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset) v_ArrVal_1180)) (.cse2 (+ c_main_~a~0.offset (* 4 v_main_~i~0_363)))) (let ((.cse0 (select .cse1 .cse2))) (or (not (= .cse0 1)) (= 3 (select (store (store .cse1 .cse2 (+ 2 .cse0)) (+ c_main_~a~0.offset (* 4 v_main_~i~0_361)) v_ArrVal_1185) c_main_~a~0.offset)) (< (+ v_main_~i~0_361 1) c_~N~0))))) is different from false [2022-01-31 11:37:49,599 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_364 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_364)) (forall ((v_ArrVal_1185 Int) (v_main_~i~0_363 Int) (v_main_~i~0_361 Int) (v_ArrVal_1180 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 4 v_main_~i~0_364)) v_ArrVal_1180)) (.cse2 (+ c_main_~a~0.offset (* 4 v_main_~i~0_363)))) (let ((.cse0 (select .cse1 .cse2))) (or (< (+ v_main_~i~0_361 1) c_~N~0) (not (= .cse0 1)) (= 3 (select (store (store .cse1 .cse2 (+ 2 .cse0)) (+ c_main_~a~0.offset (* 4 v_main_~i~0_361)) v_ArrVal_1185) c_main_~a~0.offset)))))))) is different from false [2022-01-31 11:37:51,794 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 128 treesize of output 114 [2022-01-31 11:37:51,817 INFO L353 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-01-31 11:37:51,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4564 treesize of output 4278