/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-programs/partial_mod_count_limited_gen.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:31:25,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:31:25,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:31:25,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:31:25,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:31:25,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:31:25,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:31:25,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:31:25,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:31:25,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:31:25,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:31:25,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:31:25,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:31:25,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:31:25,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:31:25,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:31:25,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:31:25,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:31:25,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:31:25,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:31:25,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:31:25,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:31:25,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:31:25,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:31:25,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:31:25,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:31:25,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:31:25,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:31:25,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:31:25,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:31:25,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:31:25,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:31:25,576 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:31:25,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:31:25,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:31:25,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:31:25,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:31:25,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:31:25,579 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:31:25,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:31:25,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:31:25,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:31:25,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:31:25,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:31:25,773 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:31:25,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_gen.c [2022-01-31 09:31:25,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0c749a5f/7af585e304194226bd4bfe02393e1332/FLAG4b18e047f [2022-01-31 09:31:26,164 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:31:26,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_gen.c [2022-01-31 09:31:26,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0c749a5f/7af585e304194226bd4bfe02393e1332/FLAG4b18e047f [2022-01-31 09:31:26,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0c749a5f/7af585e304194226bd4bfe02393e1332 [2022-01-31 09:31:26,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:31:26,186 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:31:26,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:31:26,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:31:26,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:31:26,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d16db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26, skipping insertion in model container [2022-01-31 09:31:26,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:31:26,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:31:26,318 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-programs/partial_mod_count_limited_gen.c[333,346] [2022-01-31 09:31:26,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:31:26,362 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:31:26,374 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-programs/partial_mod_count_limited_gen.c[333,346] [2022-01-31 09:31:26,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:31:26,408 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:31:26,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26 WrapperNode [2022-01-31 09:31:26,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:31:26,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:31:26,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:31:26,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:31:26,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:31:26,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:31:26,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:31:26,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:31:26,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:31:26,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:31:26,471 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 09:31:26,495 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 09:31:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:31:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:31:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:31:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:31:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:31:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:31:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:31:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:31:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:31:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:31:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:31:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:31:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 09:31:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:31:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:31:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:31:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:31:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:31:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:31:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:31:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:31:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:31:26,569 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:31:26,570 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:31:26,722 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:31:26,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:31:26,726 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:31:26,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:31:26 BoogieIcfgContainer [2022-01-31 09:31:26,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:31:26,728 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:31:26,728 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:31:26,729 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:31:26,731 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:31:26" (1/1) ... [2022-01-31 09:31:26,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:31:26 BasicIcfg [2022-01-31 09:31:26,744 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:31:26,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:31:26,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:31:26,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:31:26,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:31:26" (1/4) ... [2022-01-31 09:31:26,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8c45ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:31:26, skipping insertion in model container [2022-01-31 09:31:26,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:31:26" (2/4) ... [2022-01-31 09:31:26,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8c45ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:31:26, skipping insertion in model container [2022-01-31 09:31:26,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:31:26" (3/4) ... [2022-01-31 09:31:26,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8c45ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:31:26, skipping insertion in model container [2022-01-31 09:31:26,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:31:26" (4/4) ... [2022-01-31 09:31:26,749 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_gen.cJordan [2022-01-31 09:31:26,752 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:31:26,753 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:31:26,792 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:31:26,805 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 09:31:26,805 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:31:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:31:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:31:26,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:31:26,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:31:26,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:31:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:31:26,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2030185852, now seen corresponding path program 1 times [2022-01-31 09:31:26,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:31:26,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286602676] [2022-01-31 09:31:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:26,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:31:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:31:27,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:31:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:31:27,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:31:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:31:27,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 09:31:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:31:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:31:27,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:31:27,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286602676] [2022-01-31 09:31:27,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286602676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:31:27,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:31:27,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:31:27,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158694586] [2022-01-31 09:31:27,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:31:27,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:31:27,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:31:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:31:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:31:27,083 INFO L87 Difference]: Start difference. First operand has 34 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:31:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:31:27,140 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-31 09:31:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:31:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-01-31 09:31:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:31:27,149 INFO L225 Difference]: With dead ends: 34 [2022-01-31 09:31:27,149 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 09:31:27,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 09:31:27,157 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:31:27,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:31:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 09:31:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 09:31:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:31:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 09:31:27,182 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 25 [2022-01-31 09:31:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:31:27,182 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 09:31:27,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:31:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 09:31:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:31:27,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:31:27,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:31:27,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:31:27,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:31:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:31:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1195016899, now seen corresponding path program 1 times [2022-01-31 09:31:27,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:31:27,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939392012] [2022-01-31 09:31:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:27,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:31:27,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:31:27,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446431450] [2022-01-31 09:31:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:27,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:31:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:31:27,217 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 09:31:27,218 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 09:31:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:31:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:31:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:31:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:31:27,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:31:27,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:31:27,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939392012] [2022-01-31 09:31:27,376 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:31:27,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446431450] [2022-01-31 09:31:27,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446431450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:31:27,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:31:27,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:31:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117124569] [2022-01-31 09:31:27,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:31:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:31:27,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:31:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:31:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:31:27,378 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:31:41,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 14.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:31:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:31:41,817 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-31 09:31:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:31:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-01-31 09:31:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:31:41,819 INFO L225 Difference]: With dead ends: 43 [2022-01-31 09:31:41,819 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 09:31:41,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:31:41,820 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:31:41,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 14.4s Time] [2022-01-31 09:31:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 09:31:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-01-31 09:31:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:31:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 09:31:41,825 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 25 [2022-01-31 09:31:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:31:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 09:31:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:31:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 09:31:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:31:41,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:31:41,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:31:41,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 09:31:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:31:42,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:31:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:31:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 221617122, now seen corresponding path program 1 times [2022-01-31 09:31:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:31:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420968701] [2022-01-31 09:31:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:42,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:31:42,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:31:42,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589830801] [2022-01-31 09:31:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:31:42,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:31:42,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:31:42,044 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 09:31:42,045 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 09:31:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:31:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:31:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:31:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:31:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:31:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:31:42,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:31:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420968701] [2022-01-31 09:31:42,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:31:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589830801] [2022-01-31 09:31:42,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589830801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:31:42,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:31:42,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 09:31:42,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132842524] [2022-01-31 09:31:42,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:31:42,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:31:42,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:31:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:31:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:31:42,271 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 09:31:48,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.71s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:31:52,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:31:57,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.82s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:31:59,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:01,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:32:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:01,810 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-01-31 09:32:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:32:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-01-31 09:32:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:01,811 INFO L225 Difference]: With dead ends: 59 [2022-01-31 09:32:01,811 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 09:32:01,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:32:01,812 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:01,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 82 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 71 Invalid, 5 Unknown, 0 Unchecked, 19.5s Time] [2022-01-31 09:32:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 09:32:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-01-31 09:32:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-01-31 09:32:01,820 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 30 [2022-01-31 09:32:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:01,821 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-01-31 09:32:01,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 09:32:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-01-31 09:32:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 09:32:01,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:01,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:32:01,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 09:32:02,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 09:32:02,026 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2088533629, now seen corresponding path program 2 times [2022-01-31 09:32:02,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:02,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033509213] [2022-01-31 09:32:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:02,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:02,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:32:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533884796] [2022-01-31 09:32:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:32:02,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:02,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:02,045 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 09:32:02,046 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 09:32:02,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:32:02,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:32:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:32:02,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:32:02,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033509213] [2022-01-31 09:32:02,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:32:02,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533884796] [2022-01-31 09:32:02,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533884796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:02,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:32:02,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:32:02,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939544107] [2022-01-31 09:32:02,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:02,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:32:02,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:32:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:32:02,460 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 09:32:04,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 09:32:08,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 09:32:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:08,220 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2022-01-31 09:32:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:32:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2022-01-31 09:32:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:08,221 INFO L225 Difference]: With dead ends: 109 [2022-01-31 09:32:08,221 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 09:32:08,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:32:08,222 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 267 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:08,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 109 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 09:32:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 09:32:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2022-01-31 09:32:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-01-31 09:32:08,231 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 45 [2022-01-31 09:32:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:08,232 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-01-31 09:32:08,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 09:32:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-01-31 09:32:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 09:32:08,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:08,235 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:32:08,252 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 09:32:08,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:08,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:08,437 INFO L85 PathProgramCache]: Analyzing trace with hash -186606685, now seen corresponding path program 3 times [2022-01-31 09:32:08,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:08,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727707084] [2022-01-31 09:32:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:08,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:08,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:32:08,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157361310] [2022-01-31 09:32:08,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:32:08,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:08,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:08,472 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 09:32:08,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process