/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/nla-digbench-scaling/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:02:32,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:02:32,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:02:32,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:02:32,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:02:32,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:02:32,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:02:32,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:02:32,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:02:32,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:02:32,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:02:32,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:02:32,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:02:32,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:02:32,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:02:32,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:02:32,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:02:32,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:02:32,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:02:32,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:02:32,507 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:02:32,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:02:32,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:02:32,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:02:32,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:02:32,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:02:32,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:02:32,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:02:32,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:02:32,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:02:32,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:02:32,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:02:32,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:02:32,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:02:32,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:02:32,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:02:32,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:02:32,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:02:32,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:02:32,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:02:32,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:02:32,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:02:32,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:02:32,539 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:02:32,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:02:32,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:02:32,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:02:32,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:02:32,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:02:32,713 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:02:32,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-03-17 17:02:32,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1055c8681/0447944d984d4e2dafa4926c591d144a/FLAG050709112 [2022-03-17 17:02:33,033 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:02:33,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-03-17 17:02:33,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1055c8681/0447944d984d4e2dafa4926c591d144a/FLAG050709112 [2022-03-17 17:02:33,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1055c8681/0447944d984d4e2dafa4926c591d144a [2022-03-17 17:02:33,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:02:33,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:02:33,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:02:33,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:02:33,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:02:33,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16557052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33, skipping insertion in model container [2022-03-17 17:02:33,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:02:33,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:02:33,621 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2022-03-17 17:02:33,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:02:33,638 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:02:33,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2022-03-17 17:02:33,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:02:33,674 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:02:33,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33 WrapperNode [2022-03-17 17:02:33,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:02:33,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:02:33,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:02:33,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:02:33,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:02:33,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:02:33,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:02:33,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:02:33,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:33,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:02:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:33,729 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) [2022-03-17 17:02:33,746 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 [2022-03-17 17:02:33,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:02:33,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:02:33,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:02:33,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:02:33,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:02:33,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:02:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:02:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:02:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:02:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:02:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 17:02:33,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:02:33,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:02:33,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:02:33,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:02:33,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:02:33,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:02:33,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:02:33,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:02:33,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:02:33,826 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:02:33,827 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:02:33,977 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:02:33,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:02:33,981 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 17:02:33,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:02:33 BoogieIcfgContainer [2022-03-17 17:02:33,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:02:33,987 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:02:33,988 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:02:33,988 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:02:33,990 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:02:33" (1/1) ... [2022-03-17 17:02:34,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:02:34 BasicIcfg [2022-03-17 17:02:34,011 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:02:34,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:02:34,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:02:34,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:02:34,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:02:33" (1/4) ... [2022-03-17 17:02:34,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b81fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:02:34, skipping insertion in model container [2022-03-17 17:02:34,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:02:33" (2/4) ... [2022-03-17 17:02:34,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b81fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:02:34, skipping insertion in model container [2022-03-17 17:02:34,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:02:33" (3/4) ... [2022-03-17 17:02:34,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b81fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:02:34, skipping insertion in model container [2022-03-17 17:02:34,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:02:34" (4/4) ... [2022-03-17 17:02:34,025 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.cJordan [2022-03-17 17:02:34,028 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:02:34,028 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:02:34,062 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:02:34,066 INFO L340 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 [2022-03-17 17:02:34,067 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:02:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 17:02:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 17:02:34,087 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:34,087 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:34,088 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-03-17 17:02:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:34,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759123478] [2022-03-17 17:02:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:34,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:02:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:34,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:02:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:34,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 17:02:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:34,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759123478] [2022-03-17 17:02:34,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759123478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:34,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:34,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:02:34,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311050069] [2022-03-17 17:02:34,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:34,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:02:34,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:02:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:02:34,282 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-17 17:02:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:34,336 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-17 17:02:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:02:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22 [2022-03-17 17:02:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:34,342 INFO L225 Difference]: With dead ends: 41 [2022-03-17 17:02:34,342 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 17:02:34,343 INFO L911 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 [2022-03-17 17:02:34,345 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:34,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 17:02:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-17 17:02:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 17:02:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-17 17:02:34,368 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-17 17:02:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:34,368 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-17 17:02:34,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-17 17:02:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-17 17:02:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 17:02:34,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:34,370 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:34,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:02:34,370 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-03-17 17:02:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:34,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856917042] [2022-03-17 17:02:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:34,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:34,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:34,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711835622] [2022-03-17 17:02:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:34,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:34,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:34,384 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) [2022-03-17 17:02:34,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:02:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:02:34,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:34,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:34,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856917042] [2022-03-17 17:02:34,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711835622] [2022-03-17 17:02:34,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711835622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:34,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:34,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 17:02:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406482906] [2022-03-17 17:02:34,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:34,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:02:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:02:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:02:34,535 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-17 17:02:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:34,555 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-03-17 17:02:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:02:34,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 23 [2022-03-17 17:02:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:34,558 INFO L225 Difference]: With dead ends: 37 [2022-03-17 17:02:34,558 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 17:02:34,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:02:34,559 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:34,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 17:02:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-17 17:02:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 17:02:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-17 17:02:34,564 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-17 17:02:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:34,565 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-17 17:02:34,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-17 17:02:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-17 17:02:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 17:02:34,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:34,566 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:34,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:34,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:34,767 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-03-17 17:02:34,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:34,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124882958] [2022-03-17 17:02:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:34,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:34,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193583374] [2022-03-17 17:02:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:34,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:34,787 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) [2022-03-17 17:02:34,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:02:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:02:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 17:02:34,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124882958] [2022-03-17 17:02:34,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:34,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193583374] [2022-03-17 17:02:34,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193583374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:34,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:34,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:02:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857648257] [2022-03-17 17:02:34,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:34,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:02:34,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:02:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:02:34,904 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:02:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:34,995 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-03-17 17:02:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:02:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-17 17:02:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:34,999 INFO L225 Difference]: With dead ends: 50 [2022-03-17 17:02:34,999 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 17:02:35,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:02:35,002 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:35,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:02:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 17:02:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-03-17 17:02:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 17:02:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-03-17 17:02:35,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-03-17 17:02:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:35,014 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-03-17 17:02:35,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:02:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-03-17 17:02:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 17:02:35,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:35,017 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:35,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 17:02:35,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 17:02:35,233 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:35,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-03-17 17:02:35,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:35,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135890268] [2022-03-17 17:02:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:35,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:35,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397092783] [2022-03-17 17:02:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:35,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:35,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:35,254 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) [2022-03-17 17:02:35,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:02:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:02:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:35,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135890268] [2022-03-17 17:02:35,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397092783] [2022-03-17 17:02:35,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397092783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:35,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:35,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:02:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594558771] [2022-03-17 17:02:35,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:35,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:02:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:02:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:02:35,352 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-17 17:02:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:35,367 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-17 17:02:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:02:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 29 [2022-03-17 17:02:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:35,368 INFO L225 Difference]: With dead ends: 40 [2022-03-17 17:02:35,368 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 17:02:35,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:02:35,369 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:35,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 17:02:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-17 17:02:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 17:02:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-03-17 17:02:35,373 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-03-17 17:02:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:35,373 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-03-17 17:02:35,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-17 17:02:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-03-17 17:02:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 17:02:35,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:35,374 INFO L500 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] [2022-03-17 17:02:35,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:35,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:35,609 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-03-17 17:02:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:35,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857111482] [2022-03-17 17:02:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:35,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311463037] [2022-03-17 17:02:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:35,632 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) [2022-03-17 17:02:35,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:02:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 17:02:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 17:02:35,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:35,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857111482] [2022-03-17 17:02:35,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311463037] [2022-03-17 17:02:35,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311463037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:35,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:35,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-17 17:02:35,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512307745] [2022-03-17 17:02:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:35,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:02:35,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:02:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:02:35,888 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:02:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:36,037 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-03-17 17:02:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 17:02:36,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-17 17:02:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:36,038 INFO L225 Difference]: With dead ends: 66 [2022-03-17 17:02:36,038 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 17:02:36,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:02:36,039 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:36,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 290 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:02:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 17:02:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-03-17 17:02:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 17:02:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-17 17:02:36,044 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-17 17:02:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:36,044 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-17 17:02:36,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:02:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-17 17:02:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 17:02:36,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:36,045 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:36,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:36,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:36,260 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-03-17 17:02:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840495500] [2022-03-17 17:02:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:36,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:36,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536871382] [2022-03-17 17:02:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:36,280 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) [2022-03-17 17:02:36,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 17:02:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:02:36,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:36,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:36,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840495500] [2022-03-17 17:02:36,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536871382] [2022-03-17 17:02:36,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536871382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:36,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:36,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-17 17:02:36,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141679730] [2022-03-17 17:02:36,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:36,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:02:36,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:36,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:02:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:02:36,470 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2022-03-17 17:02:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:36,524 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-03-17 17:02:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:02:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 [2022-03-17 17:02:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:36,526 INFO L225 Difference]: With dead ends: 109 [2022-03-17 17:02:36,526 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 17:02:36,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:02:36,527 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 62 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:36,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 250 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 17:02:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2022-03-17 17:02:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.318840579710145) internal successors, (91), 72 states have internal predecessors, (91), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 17:02:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2022-03-17 17:02:36,534 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 30 [2022-03-17 17:02:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:36,534 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2022-03-17 17:02:36,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2022-03-17 17:02:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2022-03-17 17:02:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 17:02:36,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:36,551 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:36,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:36,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:36,767 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:36,767 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-03-17 17:02:36,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:36,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404068159] [2022-03-17 17:02:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:36,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:36,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717937899] [2022-03-17 17:02:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:36,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:36,784 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) [2022-03-17 17:02:36,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 17:02:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:02:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 17:02:36,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 17:02:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404068159] [2022-03-17 17:02:36,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717937899] [2022-03-17 17:02:36,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717937899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:36,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:36,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 17:02:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700186343] [2022-03-17 17:02:36,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:36,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:02:36,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:02:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:02:36,959 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:02:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:37,089 INFO L93 Difference]: Finished difference Result 174 states and 249 transitions. [2022-03-17 17:02:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 17:02:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 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 31 [2022-03-17 17:02:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:37,094 INFO L225 Difference]: With dead ends: 174 [2022-03-17 17:02:37,094 INFO L226 Difference]: Without dead ends: 174 [2022-03-17 17:02:37,094 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-17 17:02:37,095 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:37,095 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 362 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:02:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-17 17:02:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2022-03-17 17:02:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 17:02:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-03-17 17:02:37,104 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 31 [2022-03-17 17:02:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:37,105 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-03-17 17:02:37,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:02:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-03-17 17:02:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 17:02:37,105 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:37,105 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:37,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 17:02:37,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:37,326 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-03-17 17:02:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652783619] [2022-03-17 17:02:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:37,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:37,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246300895] [2022-03-17 17:02:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:37,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:37,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:37,337 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) [2022-03-17 17:02:37,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 17:02:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:37,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 17:02:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 17:02:37,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652783619] [2022-03-17 17:02:37,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246300895] [2022-03-17 17:02:37,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246300895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:37,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:37,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-17 17:02:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002698070] [2022-03-17 17:02:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:37,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:02:37,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:02:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:02:37,565 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:02:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:37,718 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2022-03-17 17:02:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 17:02:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-17 17:02:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:37,719 INFO L225 Difference]: With dead ends: 154 [2022-03-17 17:02:37,719 INFO L226 Difference]: Without dead ends: 154 [2022-03-17 17:02:37,720 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-17 17:02:37,720 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 67 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:37,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 309 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:02:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-17 17:02:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2022-03-17 17:02:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.3113207547169812) internal successors, (139), 108 states have internal predecessors, (139), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 17:02:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2022-03-17 17:02:37,727 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 34 [2022-03-17 17:02:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:37,727 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2022-03-17 17:02:37,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:02:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2022-03-17 17:02:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 17:02:37,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:37,729 INFO L500 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] [2022-03-17 17:02:37,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:37,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:37,962 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-03-17 17:02:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036420116] [2022-03-17 17:02:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:37,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:37,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119484099] [2022-03-17 17:02:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:37,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:37,973 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) [2022-03-17 17:02:37,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 17:02:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 17:02:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 17:02:38,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:38,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:38,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036420116] [2022-03-17 17:02:38,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:38,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119484099] [2022-03-17 17:02:38,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119484099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:38,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:38,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-17 17:02:38,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115637464] [2022-03-17 17:02:38,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:38,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 17:02:38,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 17:02:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:02:38,256 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:02:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:38,367 INFO L93 Difference]: Finished difference Result 176 states and 237 transitions. [2022-03-17 17:02:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:02:38,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-17 17:02:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:38,369 INFO L225 Difference]: With dead ends: 176 [2022-03-17 17:02:38,369 INFO L226 Difference]: Without dead ends: 176 [2022-03-17 17:02:38,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:02:38,370 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 84 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:38,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 388 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:02:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-17 17:02:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2022-03-17 17:02:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 129 states have internal predecessors, (170), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-17 17:02:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 234 transitions. [2022-03-17 17:02:38,377 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 234 transitions. Word has length 36 [2022-03-17 17:02:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:38,377 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 234 transitions. [2022-03-17 17:02:38,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:02:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 234 transitions. [2022-03-17 17:02:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 17:02:38,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:38,378 INFO L500 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] [2022-03-17 17:02:38,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:38,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 17:02:38,594 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-03-17 17:02:38,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:38,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805432153] [2022-03-17 17:02:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:38,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128934660] [2022-03-17 17:02:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:38,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:38,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:38,606 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) [2022-03-17 17:02:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 17:02:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:38,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:02:38,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:38,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805432153] [2022-03-17 17:02:38,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128934660] [2022-03-17 17:02:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128934660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:38,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:38,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:02:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288234264] [2022-03-17 17:02:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:38,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:02:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:02:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:02:38,707 INFO L87 Difference]: Start difference. First operand 173 states and 234 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-17 17:02:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:38,723 INFO L93 Difference]: Finished difference Result 173 states and 233 transitions. [2022-03-17 17:02:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:02:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 36 [2022-03-17 17:02:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:38,724 INFO L225 Difference]: With dead ends: 173 [2022-03-17 17:02:38,724 INFO L226 Difference]: Without dead ends: 173 [2022-03-17 17:02:38,725 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:02:38,725 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:38,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-17 17:02:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-17 17:02:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.330708661417323) internal successors, (169), 129 states have internal predecessors, (169), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-17 17:02:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2022-03-17 17:02:38,736 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 36 [2022-03-17 17:02:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:38,737 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2022-03-17 17:02:38,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-17 17:02:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2022-03-17 17:02:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 17:02:38,740 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:38,740 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:38,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:38,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 17:02:38,955 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-03-17 17:02:38,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:38,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286484184] [2022-03-17 17:02:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:38,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:38,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:38,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891219064] [2022-03-17 17:02:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:38,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:38,965 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) [2022-03-17 17:02:38,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 17:02:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:02:39,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 17:02:39,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286484184] [2022-03-17 17:02:39,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891219064] [2022-03-17 17:02:39,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891219064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:39,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:39,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:02:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190750771] [2022-03-17 17:02:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:39,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:02:39,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:02:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:02:39,104 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:02:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:39,143 INFO L93 Difference]: Finished difference Result 236 states and 329 transitions. [2022-03-17 17:02:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:02:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-17 17:02:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:39,157 INFO L225 Difference]: With dead ends: 236 [2022-03-17 17:02:39,157 INFO L226 Difference]: Without dead ends: 236 [2022-03-17 17:02:39,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:02:39,157 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:39,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-17 17:02:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2022-03-17 17:02:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 160 states have (on average 1.3625) internal successors, (218), 162 states have internal predecessors, (218), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 17:02:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2022-03-17 17:02:39,164 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 39 [2022-03-17 17:02:39,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:39,164 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2022-03-17 17:02:39,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:02:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2022-03-17 17:02:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 17:02:39,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:39,165 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:39,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:39,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 17:02:39,366 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-03-17 17:02:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:39,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950335827] [2022-03-17 17:02:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:39,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:39,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433243937] [2022-03-17 17:02:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:39,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:39,381 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) [2022-03-17 17:02:39,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 17:02:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-17 17:02:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:39,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:39,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950335827] [2022-03-17 17:02:39,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433243937] [2022-03-17 17:02:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433243937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:39,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:39,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 17:02:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121669503] [2022-03-17 17:02:39,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:39,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:02:39,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:02:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:02:39,681 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 17:02:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:40,312 INFO L93 Difference]: Finished difference Result 389 states and 574 transitions. [2022-03-17 17:02:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 17:02:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-17 17:02:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:40,314 INFO L225 Difference]: With dead ends: 389 [2022-03-17 17:02:40,314 INFO L226 Difference]: Without dead ends: 389 [2022-03-17 17:02:40,315 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-17 17:02:40,315 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 166 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:40,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 370 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 17:02:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-17 17:02:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 376. [2022-03-17 17:02:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 265 states have (on average 1.4226415094339622) internal successors, (377), 267 states have internal predecessors, (377), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-17 17:02:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 561 transitions. [2022-03-17 17:02:40,330 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 561 transitions. Word has length 41 [2022-03-17 17:02:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:40,330 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 561 transitions. [2022-03-17 17:02:40,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 17:02:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 561 transitions. [2022-03-17 17:02:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 17:02:40,334 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:40,334 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:40,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:40,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 17:02:40,553 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-03-17 17:02:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:40,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667371168] [2022-03-17 17:02:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:40,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:40,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75215043] [2022-03-17 17:02:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:40,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:40,562 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) [2022-03-17 17:02:40,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 17:02:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:02:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:02:40,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:40,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667371168] [2022-03-17 17:02:40,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75215043] [2022-03-17 17:02:40,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75215043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:40,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:40,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:02:40,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805474471] [2022-03-17 17:02:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:40,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:02:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:02:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:02:40,655 INFO L87 Difference]: Start difference. First operand 376 states and 561 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 17:02:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:40,679 INFO L93 Difference]: Finished difference Result 558 states and 875 transitions. [2022-03-17 17:02:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:02:40,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-17 17:02:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:40,682 INFO L225 Difference]: With dead ends: 558 [2022-03-17 17:02:40,682 INFO L226 Difference]: Without dead ends: 558 [2022-03-17 17:02:40,682 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:02:40,683 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:40,683 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-17 17:02:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 494. [2022-03-17 17:02:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 306 states have (on average 1.4248366013071896) internal successors, (436), 327 states have internal predecessors, (436), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 147 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-17 17:02:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 772 transitions. [2022-03-17 17:02:40,720 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 772 transitions. Word has length 44 [2022-03-17 17:02:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:40,720 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 772 transitions. [2022-03-17 17:02:40,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 17:02:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 772 transitions. [2022-03-17 17:02:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 17:02:40,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:40,721 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:40,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:40,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 17:02:40,938 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-03-17 17:02:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:40,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585002439] [2022-03-17 17:02:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:40,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:40,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:40,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686121004] [2022-03-17 17:02:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:40,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:40,948 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) [2022-03-17 17:02:40,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 17:02:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:02:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 17:02:41,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 17:02:41,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:41,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585002439] [2022-03-17 17:02:41,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:41,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686121004] [2022-03-17 17:02:41,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686121004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:41,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:41,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-17 17:02:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511705407] [2022-03-17 17:02:41,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:41,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:02:41,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:02:41,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:02:41,149 INFO L87 Difference]: Start difference. First operand 494 states and 772 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 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) [2022-03-17 17:02:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:41,201 INFO L93 Difference]: Finished difference Result 502 states and 778 transitions. [2022-03-17 17:02:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:02:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 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 42 [2022-03-17 17:02:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:41,203 INFO L225 Difference]: With dead ends: 502 [2022-03-17 17:02:41,203 INFO L226 Difference]: Without dead ends: 502 [2022-03-17 17:02:41,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:02:41,204 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:41,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-03-17 17:02:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2022-03-17 17:02:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 310 states have (on average 1.4161290322580644) internal successors, (439), 330 states have internal predecessors, (439), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-17 17:02:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 775 transitions. [2022-03-17 17:02:41,219 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 775 transitions. Word has length 42 [2022-03-17 17:02:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:41,219 INFO L478 AbstractCegarLoop]: Abstraction has 498 states and 775 transitions. [2022-03-17 17:02:41,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 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) [2022-03-17 17:02:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 775 transitions. [2022-03-17 17:02:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 17:02:41,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:41,220 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-03-17 17:02:41,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:41,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 17:02:41,436 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2022-03-17 17:02:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783106684] [2022-03-17 17:02:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:41,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:41,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:41,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630771414] [2022-03-17 17:02:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:41,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:41,456 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) [2022-03-17 17:02:41,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 17:02:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 17:02:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:41,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:02:41,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783106684] [2022-03-17 17:02:41,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630771414] [2022-03-17 17:02:41,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630771414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:41,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:41,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-17 17:02:41,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733970679] [2022-03-17 17:02:41,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:41,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 17:02:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 17:02:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:02:41,652 INFO L87 Difference]: Start difference. First operand 498 states and 775 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:02:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:41,716 INFO L93 Difference]: Finished difference Result 504 states and 778 transitions. [2022-03-17 17:02:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:02:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-03-17 17:02:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:41,718 INFO L225 Difference]: With dead ends: 504 [2022-03-17 17:02:41,718 INFO L226 Difference]: Without dead ends: 504 [2022-03-17 17:02:41,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:02:41,719 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:41,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 214 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-17 17:02:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-03-17 17:02:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 314 states have (on average 1.4044585987261147) internal successors, (441), 334 states have internal predecessors, (441), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-17 17:02:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 777 transitions. [2022-03-17 17:02:41,731 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 777 transitions. Word has length 42 [2022-03-17 17:02:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:41,731 INFO L478 AbstractCegarLoop]: Abstraction has 502 states and 777 transitions. [2022-03-17 17:02:41,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:02:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 777 transitions. [2022-03-17 17:02:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 17:02:41,732 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:41,732 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:41,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:41,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:41,947 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2022-03-17 17:02:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820632208] [2022-03-17 17:02:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:41,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:41,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816535541] [2022-03-17 17:02:41,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:02:41,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:41,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:41,957 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) [2022-03-17 17:02:41,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 17:02:41,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:02:41,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:02:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:02:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 17:02:42,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:42,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820632208] [2022-03-17 17:02:42,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816535541] [2022-03-17 17:02:42,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816535541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:42,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:42,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:02:42,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771092961] [2022-03-17 17:02:42,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:42,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:02:42,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:02:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:02:42,051 INFO L87 Difference]: Start difference. First operand 502 states and 777 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:02:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:42,110 INFO L93 Difference]: Finished difference Result 760 states and 1199 transitions. [2022-03-17 17:02:42,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:02:42,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-03-17 17:02:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:42,113 INFO L225 Difference]: With dead ends: 760 [2022-03-17 17:02:42,113 INFO L226 Difference]: Without dead ends: 760 [2022-03-17 17:02:42,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 17:02:42,113 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:42,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 198 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-17 17:02:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 523. [2022-03-17 17:02:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 351 states have (on average 1.396011396011396) internal successors, (490), 369 states have internal predecessors, (490), 153 states have call successors, (153), 19 states have call predecessors, (153), 18 states have return successors, (151), 134 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-17 17:02:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 794 transitions. [2022-03-17 17:02:42,129 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 794 transitions. Word has length 43 [2022-03-17 17:02:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:42,129 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 794 transitions. [2022-03-17 17:02:42,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:02:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 794 transitions. [2022-03-17 17:02:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 17:02:42,130 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:42,130 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:42,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:42,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 17:02:42,345 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-03-17 17:02:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575185563] [2022-03-17 17:02:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:42,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:42,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:42,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228837989] [2022-03-17 17:02:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:42,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:42,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:42,353 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) [2022-03-17 17:02:42,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 17:02:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:02:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-17 17:02:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:02:42,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:02:43,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575185563] [2022-03-17 17:02:43,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228837989] [2022-03-17 17:02:43,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228837989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:02:43,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:02:43,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-17 17:02:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163819564] [2022-03-17 17:02:43,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:43,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 17:02:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 17:02:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-17 17:02:43,513 INFO L87 Difference]: Start difference. First operand 523 states and 794 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-17 17:02:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:47,396 INFO L93 Difference]: Finished difference Result 836 states and 1287 transitions. [2022-03-17 17:02:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 17:02:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-03-17 17:02:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:47,399 INFO L225 Difference]: With dead ends: 836 [2022-03-17 17:02:47,399 INFO L226 Difference]: Without dead ends: 834 [2022-03-17 17:02:47,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 17:02:47,400 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 163 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:47,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 815 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-17 17:02:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-03-17 17:02:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 673. [2022-03-17 17:02:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 474 states have (on average 1.40084388185654) internal successors, (664), 486 states have internal predecessors, (664), 177 states have call successors, (177), 22 states have call predecessors, (177), 21 states have return successors, (175), 164 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-17 17:02:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1016 transitions. [2022-03-17 17:02:47,416 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1016 transitions. Word has length 58 [2022-03-17 17:02:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:47,417 INFO L478 AbstractCegarLoop]: Abstraction has 673 states and 1016 transitions. [2022-03-17 17:02:47,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-17 17:02:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1016 transitions. [2022-03-17 17:02:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-17 17:02:47,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:47,417 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2022-03-17 17:02:47,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:47,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 17:02:47,631 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2022-03-17 17:02:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090522312] [2022-03-17 17:02:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:47,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:47,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238767348] [2022-03-17 17:02:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:47,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:47,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:47,647 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) [2022-03-17 17:02:47,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 17:02:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 17:02:47,689 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 17:02:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 17:02:47,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 17:02:47,730 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 17:02:47,730 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 17:02:47,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:47,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 17:02:47,951 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:47,953 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 17:02:47,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:02:47 BasicIcfg [2022-03-17 17:02:47,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 17:02:47,992 INFO L158 Benchmark]: Toolchain (without parser) took 14510.03ms. Allocated memory was 221.2MB in the beginning and 324.0MB in the end (delta: 102.8MB). Free memory was 172.8MB in the beginning and 142.3MB in the end (delta: 30.6MB). Peak memory consumption was 134.7MB. Max. memory is 8.0GB. [2022-03-17 17:02:47,992 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 221.2MB. Free memory is still 188.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:02:47,992 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.27ms. Allocated memory is still 221.2MB. Free memory was 172.6MB in the beginning and 197.5MB in the end (delta: -24.9MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. [2022-03-17 17:02:47,993 INFO L158 Benchmark]: Boogie Preprocessor took 30.37ms. Allocated memory is still 221.2MB. Free memory was 197.5MB in the beginning and 196.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 17:02:47,993 INFO L158 Benchmark]: RCFGBuilder took 281.18ms. Allocated memory is still 221.2MB. Free memory was 196.1MB in the beginning and 184.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 17:02:47,993 INFO L158 Benchmark]: IcfgTransformer took 23.67ms. Allocated memory is still 221.2MB. Free memory was 184.6MB in the beginning and 183.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 17:02:47,993 INFO L158 Benchmark]: TraceAbstraction took 13979.93ms. Allocated memory was 221.2MB in the beginning and 324.0MB in the end (delta: 102.8MB). Free memory was 182.8MB in the beginning and 142.3MB in the end (delta: 40.6MB). Peak memory consumption was 143.9MB. Max. memory is 8.0GB. [2022-03-17 17:02:47,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 221.2MB. Free memory is still 188.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.27ms. Allocated memory is still 221.2MB. Free memory was 172.6MB in the beginning and 197.5MB in the end (delta: -24.9MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.37ms. Allocated memory is still 221.2MB. Free memory was 197.5MB in the beginning and 196.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 281.18ms. Allocated memory is still 221.2MB. Free memory was 196.1MB in the beginning and 184.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 23.67ms. Allocated memory is still 221.2MB. Free memory was 184.6MB in the beginning and 183.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 13979.93ms. Allocated memory was 221.2MB in the beginning and 324.0MB in the end (delta: 102.8MB). Free memory was 182.8MB in the beginning and 142.3MB in the end (delta: 40.6MB). Peak memory consumption was 143.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=10, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.9s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1000 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 943 mSDsluCounter, 4316 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3465 mSDsCounter, 556 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2475 IncrementalHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 556 mSolverCounterUnsat, 851 mSDtfsCounter, 2475 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 914 GetRequests, 747 SyntacticMatches, 7 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=673occurred in iteration=17, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 578 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 666 NumberOfCodeBlocks, 666 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 859 ConstructedInterpolants, 0 QuantifiedInterpolants, 3848 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2313 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 246/348 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-17 17:02:48,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...