/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/prod4br-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:21:55,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:21:55,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:21:55,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 19:21:55,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 19:21:55,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 19:21:55,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 19:21:55,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 19:21:55,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 19:21:55,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 19:21:55,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 19:21:55,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 19:21:55,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 19:21:55,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 19:21:55,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 19:21:55,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 19:21:55,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 19:21:55,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 19:21:55,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 19:21:55,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 19:21:55,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 19:21:55,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 19:21:55,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 19:21:55,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 19:21:56,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 19:21:56,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:21:56,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:21:56,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:21:56,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:21:56,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:21:56,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:21:56,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:21:56,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:21:56,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:21:56,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:21:56,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:21:56,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:21:56,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:21:56,027 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:21:56,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:21:56,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:21:56,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:21:56,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:21:56,240 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:21:56,243 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:21:56,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-02-23 19:21:56,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4edc23359/0cc5ce909c0546318a8c9c0ff388838e/FLAG4c92799eb [2022-02-23 19:21:56,656 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:21:56,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-02-23 19:21:56,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4edc23359/0cc5ce909c0546318a8c9c0ff388838e/FLAG4c92799eb [2022-02-23 19:21:56,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4edc23359/0cc5ce909c0546318a8c9c0ff388838e [2022-02-23 19:21:56,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:21:56,673 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:21:56,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:21:56,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:21:56,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:21:56,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfbd306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56, skipping insertion in model container [2022-02-23 19:21:56,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:21:56,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:21:56,793 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/prod4br-ll_unwindbound2.c[524,537] [2022-02-23 19:21:56,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:21:56,817 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:21:56,827 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/prod4br-ll_unwindbound2.c[524,537] [2022-02-23 19:21:56,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:21:56,856 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:21:56,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56 WrapperNode [2022-02-23 19:21:56,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:21:56,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:21:56,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:21:56,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:21:56,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:21:56,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:21:56,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:21:56,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:21:56,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (1/1) ... [2022-02-23 19:21:56,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:21:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:21:56,913 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) [2022-02-23 19:21:56,920 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 [2022-02-23 19:21:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:21:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:21:56,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:21:56,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 19:21:56,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 19:21:56,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:21:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:21:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:21:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:21:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:21:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 19:21:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 19:21:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 19:21:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:21:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:21:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:21:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:21:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:21:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:21:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:21:56,988 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:21:56,989 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:21:57,114 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:21:57,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:21:57,118 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:21:57,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:21:57 BoogieIcfgContainer [2022-02-23 19:21:57,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:21:57,120 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:21:57,120 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:21:57,127 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:21:57,130 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:21:57" (1/1) ... [2022-02-23 19:21:57,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:21:57 BasicIcfg [2022-02-23 19:21:57,155 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:21:57,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:21:57,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:21:57,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:21:57,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:21:56" (1/4) ... [2022-02-23 19:21:57,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439d2ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:21:57, skipping insertion in model container [2022-02-23 19:21:57,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:21:56" (2/4) ... [2022-02-23 19:21:57,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439d2ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:21:57, skipping insertion in model container [2022-02-23 19:21:57,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:21:57" (3/4) ... [2022-02-23 19:21:57,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439d2ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:21:57, skipping insertion in model container [2022-02-23 19:21:57,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:21:57" (4/4) ... [2022-02-23 19:21:57,161 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.cJordan [2022-02-23 19:21:57,164 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:21:57,165 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:21:57,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:21:57,198 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 19:21:57,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:21:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:21:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 19:21:57,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:21:57,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:21:57,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:21:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:21:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2022-02-23 19:21:57,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:21:57,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912267183] [2022-02-23 19:21:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:57,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:21:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:57,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:21:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:57,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 19:21:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:57,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:21:57,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912267183] [2022-02-23 19:21:57,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912267183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:21:57,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:21:57,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 19:21:57,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898578223] [2022-02-23 19:21:57,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:21:57,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 19:21:57,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:21:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 19:21:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:21:57,430 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:21:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:21:57,507 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-02-23 19:21:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 19:21:57,509 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 19:21:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:21:57,519 INFO L225 Difference]: With dead ends: 33 [2022-02-23 19:21:57,519 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 19:21:57,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:21:57,524 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:21:57,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:21:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 19:21:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-23 19:21:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 19:21:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-02-23 19:21:57,555 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-02-23 19:21:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:21:57,556 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-02-23 19:21:57,557 INFO L471 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:21:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-02-23 19:21:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 19:21:57,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:21:57,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:21:57,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:21:57,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:21:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:21:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2022-02-23 19:21:57,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:21:57,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78030841] [2022-02-23 19:21:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:57,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:21:57,591 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:21:57,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035026805] [2022-02-23 19:21:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:57,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:21:57,593 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) [2022-02-23 19:21:57,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 19:21:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:57,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 19:21:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:21:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:57,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:21:57,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:21:57,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78030841] [2022-02-23 19:21:57,764 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:21:57,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035026805] [2022-02-23 19:21:57,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035026805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:21:57,767 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:21:57,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:21:57,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21207505] [2022-02-23 19:21:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:21:57,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:21:57,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:21:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:21:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:21:57,771 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 19:21:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:21:57,785 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-02-23 19:21:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:21:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 19:21:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:21:57,788 INFO L225 Difference]: With dead ends: 29 [2022-02-23 19:21:57,788 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 19:21:57,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:21:57,792 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:21:57,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:21:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 19:21:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-23 19:21:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 19:21:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-02-23 19:21:57,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-02-23 19:21:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:21:57,796 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-02-23 19:21:57,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 19:21:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-02-23 19:21:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 19:21:57,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:21:57,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:21:57,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 19:21:58,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:58,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:21:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:21:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2022-02-23 19:21:58,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:21:58,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563017089] [2022-02-23 19:21:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:58,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:21:58,026 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:21:58,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723132402] [2022-02-23 19:21:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:58,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:21:58,031 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) [2022-02-23 19:21:58,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 19:21:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 19:21:58,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:21:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:58,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:21:58,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:21:58,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563017089] [2022-02-23 19:21:58,192 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:21:58,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723132402] [2022-02-23 19:21:58,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723132402] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:21:58,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:21:58,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:21:58,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619287396] [2022-02-23 19:21:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:21:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:21:58,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:21:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:21:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:21:58,194 INFO L87 Difference]: Start difference. First operand 29 states and 35 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:21:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:21:58,251 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-23 19:21:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:21:58,252 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 19:21:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:21:58,253 INFO L225 Difference]: With dead ends: 40 [2022-02-23 19:21:58,253 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 19:21:58,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:21:58,254 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:21:58,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:21:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 19:21:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-02-23 19:21:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:21:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-23 19:21:58,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-02-23 19:21:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:21:58,259 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-23 19:21:58,259 INFO L471 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 19:21:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-23 19:21:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:21:58,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:21:58,260 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:21:58,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 19:21:58,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 19:21:58,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:21:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:21:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2022-02-23 19:21:58,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:21:58,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309945045] [2022-02-23 19:21:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:58,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:21:58,481 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:21:58,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114800250] [2022-02-23 19:21:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:58,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:58,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:21:58,486 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) [2022-02-23 19:21:58,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 19:21:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 19:21:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:21:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:58,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:21:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:58,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:21:58,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309945045] [2022-02-23 19:21:58,947 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:21:58,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114800250] [2022-02-23 19:21:58,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114800250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:21:58,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:21:58,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-02-23 19:21:58,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378226713] [2022-02-23 19:21:58,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:21:58,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 19:21:58,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:21:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 19:21:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-23 19:21:58,949 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 19:21:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:21:59,149 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-02-23 19:21:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 19:21:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-02-23 19:21:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:21:59,154 INFO L225 Difference]: With dead ends: 53 [2022-02-23 19:21:59,154 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 19:21:59,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-23 19:21:59,157 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:21:59,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 139 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:21:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 19:21:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-02-23 19:21:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:21:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-02-23 19:21:59,165 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-02-23 19:21:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:21:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-02-23 19:21:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 19:21:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-02-23 19:21:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:21:59,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:21:59,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:21:59,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 19:21:59,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:59,372 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:21:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:21:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2022-02-23 19:21:59,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:21:59,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517372340] [2022-02-23 19:21:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:59,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:21:59,381 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:21:59,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805737665] [2022-02-23 19:21:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:59,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:21:59,383 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) [2022-02-23 19:21:59,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 19:21:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:59,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:21:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:21:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:59,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:21:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:21:59,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:21:59,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517372340] [2022-02-23 19:21:59,520 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:21:59,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805737665] [2022-02-23 19:21:59,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805737665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:21:59,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:21:59,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-02-23 19:21:59,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71096820] [2022-02-23 19:21:59,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:21:59,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:21:59,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:21:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:21:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:21:59,521 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 19:21:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:21:59,542 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-02-23 19:21:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 19:21:59,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-02-23 19:21:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:21:59,543 INFO L225 Difference]: With dead ends: 57 [2022-02-23 19:21:59,543 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 19:21:59,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:21:59,543 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:21:59,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:21:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 19:21:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-02-23 19:21:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:21:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-02-23 19:21:59,548 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 27 [2022-02-23 19:21:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:21:59,548 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-02-23 19:21:59,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 19:21:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-02-23 19:21:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:21:59,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:21:59,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:21:59,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 19:21:59,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:59,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:21:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:21:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2022-02-23 19:21:59,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:21:59,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281041086] [2022-02-23 19:21:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:59,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:21:59,788 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:21:59,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496484191] [2022-02-23 19:21:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:21:59,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:21:59,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:21:59,789 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) [2022-02-23 19:21:59,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 19:21:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:21:59,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 19:21:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:22:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:22:00,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:22:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:22:01,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:22:01,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281041086] [2022-02-23 19:22:01,288 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:22:01,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496484191] [2022-02-23 19:22:01,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496484191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:22:01,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:22:01,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-02-23 19:22:01,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807628807] [2022-02-23 19:22:01,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:22:01,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 19:22:01,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:22:01,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 19:22:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-23 19:22:01,292 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 19:22:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:22:02,907 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2022-02-23 19:22:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 19:22:02,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-02-23 19:22:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:22:02,909 INFO L225 Difference]: With dead ends: 74 [2022-02-23 19:22:02,909 INFO L226 Difference]: Without dead ends: 74 [2022-02-23 19:22:02,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-23 19:22:02,909 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 19:22:02,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 249 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 19:22:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-23 19:22:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2022-02-23 19:22:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:22:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-02-23 19:22:02,914 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 27 [2022-02-23 19:22:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:22:02,915 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-02-23 19:22:02,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 19:22:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-02-23 19:22:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:22:02,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:22:02,915 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:22:02,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 19:22:03,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:22:03,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:22:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:22:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -410392694, now seen corresponding path program 1 times [2022-02-23 19:22:03,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:22:03,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018338297] [2022-02-23 19:22:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:22:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:22:03,140 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:22:03,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024449542] [2022-02-23 19:22:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:22:03,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:22:03,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:22:03,141 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) [2022-02-23 19:22:03,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 19:22:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:22:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 19:22:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:22:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:22:03,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:22:03,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:22:03,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018338297] [2022-02-23 19:22:03,230 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:22:03,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024449542] [2022-02-23 19:22:03,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024449542] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:22:03,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:22:03,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 19:22:03,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482867761] [2022-02-23 19:22:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:22:03,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 19:22:03,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:22:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 19:22:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-23 19:22:03,232 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 19:22:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:22:03,303 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-02-23 19:22:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 19:22:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-02-23 19:22:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:22:03,305 INFO L225 Difference]: With dead ends: 74 [2022-02-23 19:22:03,305 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 19:22:03,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:22:03,306 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:22:03,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 176 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:22:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 19:22:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-02-23 19:22:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:22:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-02-23 19:22:03,319 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 29 [2022-02-23 19:22:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:22:03,320 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-02-23 19:22:03,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 19:22:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-02-23 19:22:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 19:22:03,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:22:03,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:22:03,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 19:22:03,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:22:03,539 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:22:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:22:03,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1979136443, now seen corresponding path program 2 times [2022-02-23 19:22:03,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:22:03,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483462192] [2022-02-23 19:22:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:22:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:22:03,551 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:22:03,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174656036] [2022-02-23 19:22:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:22:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:22:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:22:03,554 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) [2022-02-23 19:22:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 19:22:03,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:22:03,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-23 19:22:03,589 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 19:22:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 19:22:03,614 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 19:22:03,614 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 19:22:03,615 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 19:22:03,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 19:22:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:22:03,819 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-02-23 19:22:03,821 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 19:22:03,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:22:03 BasicIcfg [2022-02-23 19:22:03,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 19:22:03,842 INFO L158 Benchmark]: Toolchain (without parser) took 7169.05ms. Allocated memory was 181.4MB in the beginning and 266.3MB in the end (delta: 84.9MB). Free memory was 125.2MB in the beginning and 169.9MB in the end (delta: -44.7MB). Peak memory consumption was 39.6MB. Max. memory is 8.0GB. [2022-02-23 19:22:03,843 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 181.4MB. Free memory was 141.9MB in the beginning and 141.8MB in the end (delta: 77.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:22:03,843 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.82ms. Allocated memory was 181.4MB in the beginning and 266.3MB in the end (delta: 84.9MB). Free memory was 125.0MB in the beginning and 239.9MB in the end (delta: -114.9MB). Peak memory consumption was 14.6MB. Max. memory is 8.0GB. [2022-02-23 19:22:03,843 INFO L158 Benchmark]: Boogie Preprocessor took 20.46ms. Allocated memory is still 266.3MB. Free memory was 239.9MB in the beginning and 238.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 19:22:03,843 INFO L158 Benchmark]: RCFGBuilder took 240.48ms. Allocated memory is still 266.3MB. Free memory was 238.4MB in the beginning and 225.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 19:22:03,843 INFO L158 Benchmark]: IcfgTransformer took 35.54ms. Allocated memory is still 266.3MB. Free memory was 225.8MB in the beginning and 224.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 19:22:03,844 INFO L158 Benchmark]: TraceAbstraction took 6685.62ms. Allocated memory is still 266.3MB. Free memory was 223.7MB in the beginning and 169.9MB in the end (delta: 53.8MB). Peak memory consumption was 54.9MB. Max. memory is 8.0GB. [2022-02-23 19:22:03,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 181.4MB. Free memory was 141.9MB in the beginning and 141.8MB in the end (delta: 77.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 182.82ms. Allocated memory was 181.4MB in the beginning and 266.3MB in the end (delta: 84.9MB). Free memory was 125.0MB in the beginning and 239.9MB in the end (delta: -114.9MB). Peak memory consumption was 14.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.46ms. Allocated memory is still 266.3MB. Free memory was 239.9MB in the beginning and 238.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.48ms. Allocated memory is still 266.3MB. Free memory was 238.4MB in the beginning and 225.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 35.54ms. Allocated memory is still 266.3MB. Free memory was 225.8MB in the beginning and 224.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 6685.62ms. Allocated memory is still 266.3MB. Free memory was 223.7MB in the beginning and 169.9MB in the end (delta: 53.8MB). Peak memory consumption was 54.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=7, counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=4, y=4] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [\old(counter)=0, a=4, b=4, counter=0, p=1, q=0, x=4, y=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=4, counter=1, counter++=0, p=1, q=0, x=4, y=4] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=2, b=2, counter=1, p=4, q=0, x=4, y=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=2, counter=2, counter++=1, p=4, q=0, x=4, y=4] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(counter)=0, a=2, b=2, counter=2, p=4, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [\old(counter)=0, a=2, b=2, counter=2, p=4, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [\old(counter)=0, a=1, b=1, counter=2, p=16, q=0, x=4, y=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, counter=3, counter++=2, p=16, q=0, x=4, y=4] [L33] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 212 mSDsluCounter, 883 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 689 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 711 IncrementalHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 194 mSDtfsCounter, 711 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, InterpolantAutomatonStates: 54, 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, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 1052 SizeOfPredicates, 20 NumberOfNonLiveVariables, 597 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 16/30 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! [2022-02-23 19:22:03,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...