/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/egcd-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 16:50:56,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 16:50:56,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 16:50:56,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 16:50:56,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 16:50:56,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 16:50:56,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 16:50:56,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 16:50:56,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 16:50:56,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 16:50:56,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 16:50:56,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 16:50:56,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 16:50:56,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 16:50:56,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 16:50:56,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 16:50:56,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 16:50:56,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 16:50:56,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 16:50:56,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 16:50:56,707 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 16:50:56,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 16:50:56,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 16:50:56,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 16:50:56,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 16:50:56,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 16:50:56,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 16:50:56,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 16:50:56,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 16:50:56,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 16:50:56,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 16:50:56,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 16:50:56,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 16:50:56,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 16:50:56,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 16:50:56,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:50:56,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 16:50:56,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 16:50:56,758 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 16:50:56,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 16:50:56,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 16:50:56,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 16:50:56,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 16:50:56,963 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 16:50:56,964 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 16:50:56,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2022-03-17 16:50:57,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e0ce6d0/7c17da58bd5a4390a5c8d87eff2f6680/FLAG0fcc87547 [2022-03-17 16:50:57,329 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 16:50:57,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2022-03-17 16:50:57,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e0ce6d0/7c17da58bd5a4390a5c8d87eff2f6680/FLAG0fcc87547 [2022-03-17 16:50:57,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e0ce6d0/7c17da58bd5a4390a5c8d87eff2f6680 [2022-03-17 16:50:57,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 16:50:57,777 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 16:50:57,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 16:50:57,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 16:50:57,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 16:50:57,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f73a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57, skipping insertion in model container [2022-03-17 16:50:57,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 16:50:57,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 16:50:57,925 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/egcd-ll_unwindbound5.c[489,502] [2022-03-17 16:50:57,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:50:57,942 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 16:50:57,950 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/egcd-ll_unwindbound5.c[489,502] [2022-03-17 16:50:57,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:50:57,966 INFO L208 MainTranslator]: Completed translation [2022-03-17 16:50:57,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57 WrapperNode [2022-03-17 16:50:57,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 16:50:57,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 16:50:57,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 16:50:57,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 16:50:57,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 16:50:57,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 16:50:57,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 16:50:57,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 16:50:57,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (1/1) ... [2022-03-17 16:50:57,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:50:58,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:50:58,024 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 16:50:58,040 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 16:50:58,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 16:50:58,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 16:50:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 16:50:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 16:50:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 16:50:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 16:50:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 16:50:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 16:50:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 16:50:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 16:50:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 16:50:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 16:50:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 16:50:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 16:50:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 16:50:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 16:50:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 16:50:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 16:50:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 16:50:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 16:50:58,105 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 16:50:58,106 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 16:50:58,208 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 16:50:58,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 16:50:58,213 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 16:50:58,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:50:58 BoogieIcfgContainer [2022-03-17 16:50:58,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 16:50:58,215 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 16:50:58,215 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 16:50:58,216 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 16:50:58,218 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:50:58" (1/1) ... [2022-03-17 16:50:58,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:50:58 BasicIcfg [2022-03-17 16:50:58,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 16:50:58,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 16:50:58,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 16:50:58,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 16:50:58,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 04:50:57" (1/4) ... [2022-03-17 16:50:58,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167bffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:50:58, skipping insertion in model container [2022-03-17 16:50:58,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:50:57" (2/4) ... [2022-03-17 16:50:58,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167bffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:50:58, skipping insertion in model container [2022-03-17 16:50:58,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:50:58" (3/4) ... [2022-03-17 16:50:58,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167bffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:50:58, skipping insertion in model container [2022-03-17 16:50:58,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:50:58" (4/4) ... [2022-03-17 16:50:58,236 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.cJordan [2022-03-17 16:50:58,239 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 16:50:58,240 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 16:50:58,268 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 16:50:58,274 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 16:50:58,274 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 16:50:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 16:50:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 16:50:58,301 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:50:58,302 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 16:50:58,302 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:50:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:50:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2022-03-17 16:50:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:50:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490475557] [2022-03-17 16:50:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:50:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:50:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 16:50:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 16:50:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,513 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 16:50:58,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:50:58,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490475557] [2022-03-17 16:50:58,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490475557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:50:58,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:50:58,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:50:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339647737] [2022-03-17 16:50:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:50:58,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:50:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:50:58,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:50:58,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:50:58,540 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:50:58,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:50:58,598 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-03-17 16:50:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:50:58,600 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-17 16:50:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:50:58,605 INFO L225 Difference]: With dead ends: 36 [2022-03-17 16:50:58,605 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 16:50:58,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 16:50:58,609 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:50:58,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:50:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 16:50:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-17 16:50:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:50:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-17 16:50:58,635 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-17 16:50:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:50:58,636 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-17 16:50:58,636 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:50:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-17 16:50:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 16:50:58,637 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:50:58,638 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 16:50:58,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 16:50:58,638 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:50:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:50:58,639 INFO L85 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2022-03-17 16:50:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:50:58,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928940658] [2022-03-17 16:50:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:58,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:50:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:50:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 16:50:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 16:50:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,718 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 16:50:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:50:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928940658] [2022-03-17 16:50:58,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928940658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:50:58,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:50:58,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:50:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053973514] [2022-03-17 16:50:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:50:58,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:50:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:50:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:50:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:50:58,721 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:50:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:50:58,820 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-03-17 16:50:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:50:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 16:50:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:50:58,821 INFO L225 Difference]: With dead ends: 32 [2022-03-17 16:50:58,821 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 16:50:58,822 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 16:50:58,823 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:50:58,823 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:50:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 16:50:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 16:50:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 16:50:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-17 16:50:58,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-17 16:50:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:50:58,831 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-17 16:50:58,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:50:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-17 16:50:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 16:50:58,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:50:58,832 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 16:50:58,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 16:50:58,833 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:50:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:50:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2022-03-17 16:50:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:50:58,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466326922] [2022-03-17 16:50:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:50:58,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:50:58,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467810530] [2022-03-17 16:50:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:50:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:50:58,851 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 16:50:58,852 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 16:50:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 16:50:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:50:59,057 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 16:50:59,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:50:59,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:50:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466326922] [2022-03-17 16:50:59,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:50:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467810530] [2022-03-17 16:50:59,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467810530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:50:59,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:50:59,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:50:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350872488] [2022-03-17 16:50:59,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:50:59,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:50:59,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:50:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:50:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:50:59,060 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 16:50:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:50:59,096 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-03-17 16:50:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:50:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-03-17 16:50:59,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:50:59,097 INFO L225 Difference]: With dead ends: 47 [2022-03-17 16:50:59,097 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 16:50:59,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 16:50:59,098 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:50:59,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 155 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:50:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 16:50:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-17 16:50:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 16:50:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-17 16:50:59,106 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-17 16:50:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:50:59,107 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-17 16:50:59,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 16:50:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-17 16:50:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 16:50:59,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:50:59,108 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] [2022-03-17 16:50:59,131 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 16:50:59,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:50:59,327 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:50:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:50:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2022-03-17 16:50:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:50:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916028036] [2022-03-17 16:50:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:50:59,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:50:59,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696206452] [2022-03-17 16:50:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:59,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:50:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:50:59,346 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 16:50:59,347 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 16:50:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 16:50:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:50:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 16:50:59,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:50:59,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:50:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916028036] [2022-03-17 16:50:59,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:50:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696206452] [2022-03-17 16:50:59,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696206452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 16:50:59,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:50:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 16:50:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025727625] [2022-03-17 16:50:59,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 16:50:59,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:50:59,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:50:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:50:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:50:59,610 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 16:50:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:50:59,716 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-03-17 16:50:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 16:50:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-17 16:50:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:50:59,718 INFO L225 Difference]: With dead ends: 51 [2022-03-17 16:50:59,718 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 16:50:59,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:50:59,719 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:50:59,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 209 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:50:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 16:50:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 16:50:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 16:50:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-17 16:50:59,725 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-17 16:50:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:50:59,725 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-17 16:50:59,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 16:50:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-17 16:50:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 16:50:59,726 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:50:59,726 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] [2022-03-17 16:50:59,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 16:50:59,942 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,SelfDestructingSolverStorable3 [2022-03-17 16:50:59,943 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:50:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:50:59,943 INFO L85 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2022-03-17 16:50:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:50:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373624275] [2022-03-17 16:50:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:50:59,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:50:59,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63928137] [2022-03-17 16:50:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:50:59,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:50:59,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:50:59,957 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 16:50:59,976 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 16:50:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:50:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 16:51:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 16:51:00,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:51:00,208 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 16:51:00,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:00,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373624275] [2022-03-17 16:51:00,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:00,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63928137] [2022-03-17 16:51:00,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63928137] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:51:00,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:51:00,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-17 16:51:00,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007408915] [2022-03-17 16:51:00,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:51:00,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:51:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:51:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:51:00,210 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 16:51:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:00,250 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2022-03-17 16:51:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:51:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 33 [2022-03-17 16:51:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:00,255 INFO L225 Difference]: With dead ends: 73 [2022-03-17 16:51:00,255 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 16:51:00,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 16:51:00,256 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:00,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:51:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 16:51:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-17 16:51:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 16:51:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-17 16:51:00,267 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-17 16:51:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:00,268 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-17 16:51:00,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 16:51:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-17 16:51:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 16:51:00,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:00,269 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] [2022-03-17 16:51:00,288 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 16:51:00,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:00,484 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2022-03-17 16:51:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:00,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345076079] [2022-03-17 16:51:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:00,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:00,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775436297] [2022-03-17 16:51:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:00,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:00,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:00,499 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 16:51:00,501 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 16:51:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:51:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 16:51:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:00,580 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 16:51:00,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:51:00,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:00,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345076079] [2022-03-17 16:51:00,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:00,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775436297] [2022-03-17 16:51:00,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775436297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:51:00,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:51:00,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:51:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429316551] [2022-03-17 16:51:00,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:51:00,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:51:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:51:00,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:51:00,583 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-17 16:51:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:00,617 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2022-03-17 16:51:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:51:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-17 16:51:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:00,622 INFO L225 Difference]: With dead ends: 85 [2022-03-17 16:51:00,622 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 16:51:00,622 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 16:51:00,625 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:00,625 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:51:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 16:51:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-17 16:51:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-17 16:51:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-17 16:51:00,637 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-17 16:51:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:00,637 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-17 16:51:00,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-17 16:51:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-17 16:51:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 16:51:00,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:00,639 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 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 16:51:00,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 16:51:00,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:00,840 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2022-03-17 16:51:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:00,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061976957] [2022-03-17 16:51:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:00,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:00,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249556512] [2022-03-17 16:51:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:00,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:00,899 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 16:51:00,924 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 16:51:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:51:00,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:51:00,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 16:51:01,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:51:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 16:51:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061976957] [2022-03-17 16:51:01,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249556512] [2022-03-17 16:51:01,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249556512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:51:01,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:51:01,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 16:51:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649846603] [2022-03-17 16:51:01,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:51:01,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:51:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:01,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:51:01,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:51:01,228 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 16:51:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:01,315 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2022-03-17 16:51:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 16:51:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2022-03-17 16:51:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:01,317 INFO L225 Difference]: With dead ends: 202 [2022-03-17 16:51:01,317 INFO L226 Difference]: Without dead ends: 200 [2022-03-17 16:51:01,318 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:51:01,318 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:01,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 176 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:51:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-17 16:51:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-03-17 16:51:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 120 states have internal predecessors, (133), 63 states have call successors, (63), 23 states have call predecessors, (63), 21 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-17 16:51:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2022-03-17 16:51:01,331 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 42 [2022-03-17 16:51:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:01,331 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 251 transitions. [2022-03-17 16:51:01,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 16:51:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions. [2022-03-17 16:51:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 16:51:01,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:01,332 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:51:01,355 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 16:51:01,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:01,548 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1627394196, now seen corresponding path program 1 times [2022-03-17 16:51:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150262106] [2022-03-17 16:51:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:01,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:01,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:01,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843296342] [2022-03-17 16:51:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:01,558 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 16:51:01,572 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 16:51:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:51:01,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 16:51:01,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 16:51:01,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:51:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150262106] [2022-03-17 16:51:01,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:01,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843296342] [2022-03-17 16:51:01,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843296342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:51:01,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:51:01,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:51:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768954745] [2022-03-17 16:51:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:51:01,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:51:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:51:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:51:01,703 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 16:51:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:01,727 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2022-03-17 16:51:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:51:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 42 [2022-03-17 16:51:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:01,729 INFO L225 Difference]: With dead ends: 206 [2022-03-17 16:51:01,729 INFO L226 Difference]: Without dead ends: 203 [2022-03-17 16:51:01,729 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 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 16:51:01,730 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:01,730 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:51:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-17 16:51:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-17 16:51:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 129 states have internal predecessors, (142), 60 states have call successors, (60), 26 states have call predecessors, (60), 24 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-17 16:51:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2022-03-17 16:51:01,741 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 42 [2022-03-17 16:51:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:01,742 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2022-03-17 16:51:01,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 16:51:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2022-03-17 16:51:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 16:51:01,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:01,743 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:51:01,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 16:51:01,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:01,960 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2022-03-17 16:51:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:01,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17301007] [2022-03-17 16:51:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:01,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:01,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579073317] [2022-03-17 16:51:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:01,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:01,971 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 16:51:01,972 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 16:51:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:51:02,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 16:51:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 16:51:02,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:51:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 16:51:02,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:02,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17301007] [2022-03-17 16:51:02,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579073317] [2022-03-17 16:51:02,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579073317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:51:02,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:51:02,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 16:51:02,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299742323] [2022-03-17 16:51:02,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:51:02,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 16:51:02,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:02,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 16:51:02,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:51:02,172 INFO L87 Difference]: Start difference. First operand 203 states and 254 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 16:51:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:02,275 INFO L93 Difference]: Finished difference Result 230 states and 285 transitions. [2022-03-17 16:51:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 16:51:02,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-17 16:51:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:02,277 INFO L225 Difference]: With dead ends: 230 [2022-03-17 16:51:02,277 INFO L226 Difference]: Without dead ends: 216 [2022-03-17 16:51:02,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 16:51:02,278 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:02,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 147 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 16:51:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-17 16:51:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-03-17 16:51:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 128 states have (on average 1.1640625) internal successors, (149), 139 states have internal predecessors, (149), 59 states have call successors, (59), 27 states have call predecessors, (59), 26 states have return successors, (54), 47 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-17 16:51:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-03-17 16:51:02,298 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 44 [2022-03-17 16:51:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:02,299 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-03-17 16:51:02,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-17 16:51:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-03-17 16:51:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 16:51:02,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:02,299 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-03-17 16:51:02,318 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 16:51:02,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:02,517 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 2 times [2022-03-17 16:51:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:02,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077450650] [2022-03-17 16:51:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:02,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:02,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:02,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115924623] [2022-03-17 16:51:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:51:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:02,539 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 16:51:02,541 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 16:51:02,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 16:51:02,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:51:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 16:51:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 16:51:02,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:51:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 16:51:02,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077450650] [2022-03-17 16:51:02,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115924623] [2022-03-17 16:51:02,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115924623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:51:02,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:51:02,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 16:51:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430905915] [2022-03-17 16:51:02,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:51:02,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:51:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:51:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:51:02,853 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-17 16:51:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:03,353 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2022-03-17 16:51:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 16:51:03,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 47 [2022-03-17 16:51:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:03,356 INFO L225 Difference]: With dead ends: 251 [2022-03-17 16:51:03,357 INFO L226 Difference]: Without dead ends: 229 [2022-03-17 16:51:03,357 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:51:03,357 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:03,357 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-17 16:51:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-17 16:51:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-03-17 16:51:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.126865671641791) internal successors, (151), 142 states have internal predecessors, (151), 47 states have call successors, (47), 29 states have call predecessors, (47), 28 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 16:51:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-03-17 16:51:03,366 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 47 [2022-03-17 16:51:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:03,367 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-03-17 16:51:03,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-17 16:51:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-03-17 16:51:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 16:51:03,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:03,370 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:51:03,410 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 16:51:03,588 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,SelfDestructingSolverStorable9 [2022-03-17 16:51:03,589 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2022-03-17 16:51:03,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:03,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131756215] [2022-03-17 16:51:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:03,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:03,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734046910] [2022-03-17 16:51:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:03,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:03,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:03,598 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 16:51:03,599 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 16:51:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:51:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 16:51:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 16:51:03,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:51:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-17 16:51:03,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:03,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131756215] [2022-03-17 16:51:03,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:03,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734046910] [2022-03-17 16:51:03,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734046910] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:51:03,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:51:03,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-17 16:51:03,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52391646] [2022-03-17 16:51:03,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:51:03,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:51:03,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:51:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:51:03,921 INFO L87 Difference]: Start difference. First operand 210 states and 240 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 16:51:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:03,941 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2022-03-17 16:51:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:51:03,942 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), 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 61 [2022-03-17 16:51:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:03,944 INFO L225 Difference]: With dead ends: 214 [2022-03-17 16:51:03,944 INFO L226 Difference]: Without dead ends: 192 [2022-03-17 16:51:03,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 16:51:03,945 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:03,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:51:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-17 16:51:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-03-17 16:51:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.112) internal successors, (139), 129 states have internal predecessors, (139), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-17 16:51:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2022-03-17 16:51:03,953 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 61 [2022-03-17 16:51:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:03,953 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2022-03-17 16:51:03,953 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), 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 16:51:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2022-03-17 16:51:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-17 16:51:03,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:03,956 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:51:03,973 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 16:51:04,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:04,174 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 2 times [2022-03-17 16:51:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665980796] [2022-03-17 16:51:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:04,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377253212] [2022-03-17 16:51:04,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 16:51:04,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:04,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:04,183 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 16:51:04,218 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 16:51:04,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 16:51:04,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 16:51:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 16:51:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:51:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 16:51:04,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:51:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-17 16:51:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:51:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665980796] [2022-03-17 16:51:04,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:51:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377253212] [2022-03-17 16:51:04,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377253212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:51:04,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:51:04,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-17 16:51:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125307429] [2022-03-17 16:51:04,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:51:04,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 16:51:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:51:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 16:51:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 16:51:04,596 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2022-03-17 16:51:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:51:04,671 INFO L93 Difference]: Finished difference Result 242 states and 272 transitions. [2022-03-17 16:51:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 16:51:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) Word has length 99 [2022-03-17 16:51:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:51:04,673 INFO L225 Difference]: With dead ends: 242 [2022-03-17 16:51:04,673 INFO L226 Difference]: Without dead ends: 242 [2022-03-17 16:51:04,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-17 16:51:04,674 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:51:04,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:51:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-17 16:51:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-03-17 16:51:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 160 states have (on average 1.10625) internal successors, (177), 165 states have internal predecessors, (177), 49 states have call successors, (49), 33 states have call predecessors, (49), 32 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-17 16:51:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 272 transitions. [2022-03-17 16:51:04,680 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 272 transitions. Word has length 99 [2022-03-17 16:51:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:51:04,680 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 272 transitions. [2022-03-17 16:51:04,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2022-03-17 16:51:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 272 transitions. [2022-03-17 16:51:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-17 16:51:04,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:51:04,681 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:51:04,711 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 16:51:04,899 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,SelfDestructingSolverStorable11 [2022-03-17 16:51:04,899 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:51:04,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:51:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1621622896, now seen corresponding path program 3 times [2022-03-17 16:51:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:51:04,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316980922] [2022-03-17 16:51:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:51:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:51:04,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:51:04,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499978405] [2022-03-17 16:51:04,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 16:51:04,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:51:04,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:51:04,909 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 16:51:04,910 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 16:51:04,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-17 16:51:04,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-17 16:51:04,976 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 16:51:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 16:51:05,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 16:51:05,078 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 16:51:05,079 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 16:51:05,113 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 16:51:05,299 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,SelfDestructingSolverStorable12 [2022-03-17 16:51:05,301 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:51:05,304 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 16:51:05,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:51:05 BasicIcfg [2022-03-17 16:51:05,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 16:51:05,357 INFO L158 Benchmark]: Toolchain (without parser) took 7580.44ms. Allocated memory was 204.5MB in the beginning and 276.8MB in the end (delta: 72.4MB). Free memory was 152.2MB in the beginning and 210.1MB in the end (delta: -57.8MB). Peak memory consumption was 15.9MB. Max. memory is 8.0GB. [2022-03-17 16:51:05,357 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 204.5MB. Free memory was 168.5MB in the beginning and 168.4MB in the end (delta: 79.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 16:51:05,358 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.55ms. Allocated memory is still 204.5MB. Free memory was 152.0MB in the beginning and 177.4MB in the end (delta: -25.4MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2022-03-17 16:51:05,358 INFO L158 Benchmark]: Boogie Preprocessor took 19.96ms. Allocated memory is still 204.5MB. Free memory was 177.4MB in the beginning and 175.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 16:51:05,358 INFO L158 Benchmark]: RCFGBuilder took 226.41ms. Allocated memory is still 204.5MB. Free memory was 175.8MB in the beginning and 164.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 16:51:05,358 INFO L158 Benchmark]: IcfgTransformer took 15.81ms. Allocated memory is still 204.5MB. Free memory was 164.8MB in the beginning and 163.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 16:51:05,358 INFO L158 Benchmark]: TraceAbstraction took 7125.23ms. Allocated memory was 204.5MB in the beginning and 276.8MB in the end (delta: 72.4MB). Free memory was 163.2MB in the beginning and 210.1MB in the end (delta: -46.9MB). Peak memory consumption was 25.4MB. Max. memory is 8.0GB. [2022-03-17 16:51:05,359 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 204.5MB. Free memory was 168.5MB in the beginning and 168.4MB in the end (delta: 79.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.55ms. Allocated memory is still 204.5MB. Free memory was 152.0MB in the beginning and 177.4MB in the end (delta: -25.4MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.96ms. Allocated memory is still 204.5MB. Free memory was 177.4MB in the beginning and 175.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 226.41ms. Allocated memory is still 204.5MB. Free memory was 175.8MB in the beginning and 164.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.81ms. Allocated memory is still 204.5MB. Free memory was 164.8MB in the beginning and 163.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7125.23ms. Allocated memory was 204.5MB in the beginning and 276.8MB in the end (delta: 72.4MB). Free memory was 163.2MB in the beginning and 210.1MB in the end (delta: -46.9MB). Peak memory consumption was 25.4MB. 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)=11, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [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=7, y=1] [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=7, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=7, b=1, counter=0, p=1, q=0, r=0, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=7, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=6, b=1, counter=1, p=1, q=0, r=-1, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=6, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=5, b=1, counter=2, p=1, q=0, r=-2, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=4, b=1, counter=3, p=1, q=0, r=-3, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=4, counter++=3, p=1, q=0, r=-3, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=4, p=1, q=0, r=-4, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=5, counter++=4, p=1, q=0, r=-4, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L36] 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] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L37] 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] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=5, p=1, q=0, r=-5, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=6, counter++=5, p=1, q=0, r=-5, s=1, x=7, y=1] [L34] COND FALSE !(counter++<5) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 13, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 192 mSDsluCounter, 1736 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1248 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 627 IncrementalHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 488 mSDtfsCounter, 627 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 819 GetRequests, 731 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=242occurred in iteration=12, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 40 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 621 NumberOfCodeBlocks, 621 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 811 ConstructedInterpolants, 0 QuantifiedInterpolants, 2393 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1453 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 790/1151 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 16:51:05,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...